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1.
Genes Dev ; 33(21-22): 1575-1590, 2019 11 01.
Artículo en Inglés | MEDLINE | ID: mdl-31537626

RESUMEN

PIWI proteins utilize small RNAs called piRNAs to silence transposable elements, thereby protecting germline integrity. In planarian flatworms, PIWI proteins are essential for regeneration, which requires adult stem cells termed neoblasts. Here, we characterize planarian piRNAs and examine the roles of PIWI proteins in neoblast biology. We find that the planarian PIWI proteins SMEDWI-2 and SMEDWI-3 cooperate to degrade active transposons via the ping-pong cycle. Unexpectedly, we discover that SMEDWI-3 plays an additional role in planarian mRNA surveillance. While SMEDWI-3 degrades numerous neoblast mRNAs in a homotypic ping-pong cycle, it is also guided to another subset of neoblast mRNAs by antisense piRNAs and binds these without degrading them. Mechanistically, the distinct activities of SMEDWI-3 are primarily dictated by the degree of complementarity between target mRNAs and antisense piRNAs. Thus, PIWI proteins enable planarians to repurpose piRNAs for potentially critical roles in neoblast mRNA turnover.


Asunto(s)
Células Madre Adultas/metabolismo , Proteínas del Helminto/metabolismo , Planarias/citología , Planarias/metabolismo , ARN Mensajero/metabolismo , ARN Interferente Pequeño/metabolismo , Animales , Emparejamiento Base , Elementos Transponibles de ADN , Inmunoprecipitación , Unión Proteica , Estabilidad del ARN
2.
Birth ; 2024 Jun 19.
Artículo en Inglés | MEDLINE | ID: mdl-38898696

RESUMEN

BACKGROUND: The impact of midwifery, and especially Indigenous midwifery, care for Indigenous women and communities has not been comprehensively reviewed. To address this knowledge gap, we conducted a mixed-methods systematic review to understand Indigenous maternal and infant outcomes and women's' experiences with midwifery care. METHODS: We searched nine databases to identify primary studies reporting on midwifery and Indigenous maternal and infant birth outcomes and experiences, published in English since 2000. We synthesized quantitative and qualitative outcome data using a convergent segregated mixed-methods approach and used a mixed-methods appraisal tool (MMAT) to assess the methodological quality of included studies. The Aboriginal and Torres Strait Islander Quality Appraisal Tool (ATSI QAT) was used to appraise the inclusion of Indigenous perspectives in the evidence. RESULTS: Out of 3044 records, we included 35 individual studies with 55% (19 studies) reporting on maternal and infant health outcomes. Comparative studies (n = 13) showed no significant differences in mortality rates but identified reduced preterm births, earlier prenatal care, and an increased number of prenatal visits for Indigenous women receiving midwifery care. Quality of care studies indicated a preference for midwifery care among Indigenous women. Sixteen qualitative studies highlighted three key findings - culturally safe care, holistic care, and improved access to care. The majority of studies were of high methodological quality (91% met ≥80% criteria), while only 14% of studies were considered to have appropriately included Indigenous perspectives. CONCLUSION: This review demonstrates the value of midwifery care for Indigenous women, providing evidence to support policy recommendations promoting midwifery care as a physically and culturally safe model for Indigenous women and families.

3.
Health Expect ; 27(1): e13994, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38389163

RESUMEN

INTRODUCTION: Throughout the coronavirus disease 2019 (COVID-19) pandemic, parents and children faced significant challenges as a result of prevention measures implemented to control the spread of the disease. Ensuring that families have access to essential health information is critical for improving health outcomes and adherence to public health recommendations. Understanding parents' experiences and information needs related to the pandemic and associated health measures (e.g., vaccination, mask wearing, social distancing, etc.) will inform the development and dissemination of resources tailored to parents' needs to support informed decision making. METHODS: We conducted a qualitative descriptive study. Between September and November 2021, parents across Canada were recruited online via social media and community organisation newsletters and listservs to participate in focus groups via Zoom. Focus groups were audio-recorded and transcribed verbatim. Data were coded and analysed using thematic analysis. Participants completed a demographic questionnaire before the focus groups (via SimpleSurveys). RESULTS: Sixty-seven parents participated in 12 focus groups between October and November 2021. In relation to experiences, parents felt they were (1) constantly trying to balance everything, and (2) trying to do their best with the information they had at the time when making decisions. Regarding information needs, parents reflected on (1) how difficult it was navigating copious amounts of changing information and finding credible sources to rely on, (2) the need for resources that were easily accessible, credible and in plain language and (3) the need for resources that were tailored to their needs to support them and their children make informed decisions. CONCLUSIONS: Trying to mitigate the risk of COVID-19 infection and adhere to public health recommendations, while balancing various factors (work, online learning, and social interactions) and navigating changing information, was overwhelming for many parents. Reflecting on their needs, parents suggested tailored resources that provided concise, credible information in plain language to help them make informed decisions and navigate conflicting information. These findings reveal important knowledge gaps and highlight areas that need to be addressed to support parents during the pandemic period and beyond. PATIENT OR PUBLIC CONTRIBUTION: Members of our established Paediatric Parent Advisory Group (P-PAG) were involved as collaborators throughout the planning (grant proposal), development and execution of the study. P-PAG members gave input on the design of the questionnaire, interview guide, recruitment strategy and interpretation of findings.


Asunto(s)
COVID-19 , Pandemias , Niño , Humanos , COVID-19/epidemiología , COVID-19/prevención & control , Padres , Investigación Cualitativa , Grupos Focales
4.
J Health Commun ; 29(3): 211-219, 2024 Mar 03.
Artículo en Inglés | MEDLINE | ID: mdl-38354266

RESUMEN

The objective of this study was to understand how youth search for mental health information online. Youth partners were engaged at the onset of the project and provided input throughout on the design, conduct and analysis. Individual, semi-structured interviews with Canadian youth with experience searching for mental health information online were conducted. Data collection and reflexive thematic analysis proceeded concurrently. Fourteen youth were interviewed. Four main themes related to how youth search online emerged: mind-set shapes the search process; external factors shape the search process; key attributes of helpful information; and cues affecting trustworthiness of online information. Findings can inform the development of youth-friendly online mental health information that is perceived as helpful and trustworthy by youth. Ensuring youth have access to quality online mental health information, accessible to how they search for it, is critical to the mental health and development of youth.


Asunto(s)
Salud Mental , Adolescente , Humanos , Canadá , Investigación Cualitativa , Conducta en la Búsqueda de Información
5.
Eur J Nutr ; 61(4): 1849-1861, 2022 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-34928408

RESUMEN

PURPOSE: Dietary intake can affect energy homeostasis and influence body weight control. The aim of this study was to compare the impact of high-protein total diet replacement (HP-TDR) versus a control (CON) diet in the regulation of food intake and energy homeostasis in healthy, normal-weight adults. METHODS: In this acute randomized controlled, cross-over study, participants completed two isocaloric arms: a) HP-TDR: 35% carbohydrate, 40% protein, and 25% fat; b) CON: 55% carbohydrate, 15% protein, and 30% fat. The diets were provided for 32 h while inside a whole-body calorimetry unit. Appetite sensations, appetite-related hormones, and energy metabolism were assessed. RESULTS: Forty-three healthy, normal-weight adults (19 females) participated. Appetite sensations did not differ between diets (all p > 0.05). Compared to the CON diet, the change in fasting blood markers during the HP-TDR intervention was smaller for peptide tyrosine-tyrosine (PYY; - 18.9 ± 7.9 pg/mL, p = 0.02) and greater for leptin (1859 ± 652 pg/mL, p = 0.007). Moreover, postprandial levels of glucagon-like peptide 1 (1.62 ± 0.36 pM, p < 0.001) and PYY (31.37 ± 8.05 pg/mL, p < 0.001) were higher in the HP-TDR. Significant correlations were observed between energy balance and satiety (r = - 0.41, p = 0.007), and energy balance and PFC (r = 0.33, p = 0.033) in the HP-TDR. CONCLUSION: Compared to the CON diet, the HP-TDR increased blood levels of anorexigenic hormones. Moreover, females and males responded differently to the intervention in terms of appetite sensations and appetite-related hormones. TRIAL REGISTRATION: NCT02811276 (retrospectively registered on 16 June 2016) and NCT03565510 (retrospectively registered on 11 June 2018).


Asunto(s)
Apetito , Ingestión de Energía , Adulto , Apetito/fisiología , Carbohidratos , Estudios Cruzados , Dieta , Ingestión de Alimentos , Metabolismo Energético/fisiología , Femenino , Ghrelina , Homeostasis , Humanos , Masculino , Péptido YY
6.
BMC Med Res Methodol ; 21(1): 169, 2021 08 16.
Artículo en Inglés | MEDLINE | ID: mdl-34399684

RESUMEN

BACKGROUND: Machine learning tools that semi-automate data extraction may create efficiencies in systematic review production. We evaluated a machine learning and text mining tool's ability to (a) automatically extract data elements from randomized trials, and (b) save time compared with manual extraction and verification. METHODS: For 75 randomized trials, we manually extracted and verified data for 21 data elements. We uploaded the randomized trials to an online machine learning and text mining tool, and quantified performance by evaluating its ability to identify the reporting of data elements (reported or not reported), and the relevance of the extracted sentences, fragments, and overall solutions. For each randomized trial, we measured the time to complete manual extraction and verification, and to review and amend the data extracted by the tool. We calculated the median (interquartile range [IQR]) time for manual and semi-automated data extraction, and overall time savings. RESULTS: The tool identified the reporting (reported or not reported) of data elements with median (IQR) 91% (75% to 99%) accuracy. Among the top five sentences for each data element at least one sentence was relevant in a median (IQR) 88% (83% to 99%) of cases. Among a median (IQR) 90% (86% to 97%) of relevant sentences, pertinent fragments had been highlighted by the tool; exact matches were unreliable (median (IQR) 52% [33% to 73%]). A median 48% of solutions were fully correct, but performance varied greatly across data elements (IQR 21% to 71%). Using ExaCT to assist the first reviewer resulted in a modest time savings compared with manual extraction by a single reviewer (17.9 vs. 21.6 h total extraction time across 75 randomized trials). CONCLUSIONS: Using ExaCT to assist with data extraction resulted in modest gains in efficiency compared with manual extraction. The tool was reliable for identifying the reporting of most data elements. The tool's ability to identify at least one relevant sentence and highlight pertinent fragments was generally good, but changes to sentence selection and/or highlighting were often required. PROTOCOL: https://doi.org/10.7939/DVN/RQPJKS.


Asunto(s)
Minería de Datos , Aprendizaje Automático , Humanos , Lenguaje , Ensayos Clínicos Controlados Aleatorios como Asunto , Proyectos de Investigación
7.
Health Expect ; 24(5): 1763-1779, 2021 10.
Artículo en Inglés | MEDLINE | ID: mdl-34288282

RESUMEN

BACKGROUND: Engaging youth throughout the research process improves research quality and outcomes. Youth advisory groups provide one way for youth to express their opinions on relevant issues. OBJECTIVE: This study aimed to identify research- and health-related youth advisory groups ('groups') in Canada and understand the best practices of these groups. METHODS: Google searches and supplementary methods were used to identify relevant groups in Canada. Group information was extracted from websites or through interviews with key informants. RESULTS: We identified 40 groups. Groups were commonly part of a hospital/healthcare facility, nonprofit/health organization or research group. The majority focused on a specific content area, most commonly, mental health. Over half the groups advised on health services. Members' ages ranged from 9 to 35 years. The number of members ranged from 5 to 130. Interviews (n = 12) identified seven categories relating to group practices: (a) group purpose/objectives, (b) group development, (c) group operations, (d) group structure, (e) adult involvement, (f) membership and recruitment and (g) group access. Challenges and facilitators to the success of groups were described within the following themes: (a) retaining engagement, (b) creating a safe environment and (c) putting youth in positions of influence. Advice and recommendations were provided regarding the development of a new group. CONCLUSION: This study provides a comprehensive overview of research- and health-related youth advisory groups in Canada. This information can be used to identify groups that stakeholders could access as well as inform the development of a new group. PATIENT OR PUBLIC CONTRIBUTION: Youth advisory group representatives were interviewed as part of the study.


Asunto(s)
Salud Mental , Adolescente , Adulto , Canadá , Niño , Humanos , Adulto Joven
8.
Paediatr Child Health ; 26(5): 310-316, 2021 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-34336060

RESUMEN

BACKGROUND: Childhood overweight and obesity are associated with adverse physical, social, and psychological outcomes. OBJECTIVES: We conducted an overview of Cochrane systematic reviews on the effectiveness and risks of interventions to treat overweight and obesity in children and adolescents. METHODS: In June 2019, we searched the Cochrane Database of Systematic Reviews for eligible reviews. The primary outcomes were change in adiposity (body mass and body mass index [BMI] z-score) and adverse events. Two reviewers screened studies and one reviewer extracted and another verified data. Two reviewers assessed methodological quality and reached consensus. Data were synthesized narratively. RESULTS: We included seven Cochrane reviews published between 2011 and 2017 containing evidence from 167 randomized controlled trials with 21,050 participants. Lifestyle and behavioural interventions more effectively reduced weight compared with no intervention, usual care, or another behavioural treatment (three reviews, low-to-moderate certainty). Parent-child lifestyle and behavioural interventions more effectively reduced BMI z-score compared with no intervention (one review, low certainty). Decision support tools for healthcare providers more effectively limited increases in BMI z-score compared with usual care (one review, moderate certainty). Pharmacologic treatments combined with behavioural modification more effectively reduced adiposity compared with placebo or usual care (one review, low certainty), but the risk of adverse events was greater than non-pharmacologic therapy. Surgical interventions (e.g., LAP-BAND) combined with behavioural modification more effectively reduced adiposity compared with behavioural modification alone (one review, low certainty). Those who underwent surgery reported a higher number of adverse events compared with those treated with lifestyle modification. CONCLUSIONS: There is low-certainty evidence that lifestyle and behavioural interventions, pharmacologic interventions, and surgical interventions are effective in weight management for children with overweight and obesity. Safety data remain lacking across all intervention modalities. Future research should focus on implementation strategies. Further, a focus on overall well-being may be more beneficial than weight management specifically.

9.
Development ; 144(18): 3211-3223, 2017 09 15.
Artículo en Inglés | MEDLINE | ID: mdl-28807895

RESUMEN

Brain regeneration in planarians is mediated by precise spatiotemporal control of gene expression and is crucial for multiple aspects of neurogenesis. However, the mechanisms underpinning the gene regulation essential for brain regeneration are largely unknown. Here, we investigated the role of the miR-124 family of microRNAs in planarian brain regeneration. The miR-124 family (miR-124) is highly conserved in animals and regulates neurogenesis by facilitating neural differentiation, yet its role in neural wiring and brain organization is not known. We developed a novel method for delivering anti-miRs using liposomes for the functional knockdown of microRNAs. Smed-miR-124 knockdown revealed a key role for these microRNAs in neuronal organization during planarian brain regeneration. Our results also demonstrated an essential role for miR-124 in the generation of eye progenitors. Additionally, miR-124 regulates Smed-slit-1, which encodes an axon guidance protein, either by targeting slit-1 mRNA or, potentially, by modulating the canonical Notch pathway. Together, our results reveal a role for miR-124 in regulating the regeneration of a functional brain and visual system.


Asunto(s)
Encéfalo/fisiología , MicroARNs/metabolismo , Planarias/genética , Planarias/fisiología , Regeneración , Vías Visuales/fisiología , Animales , Fenómenos Biofísicos , Ganglios de Invertebrados/fisiología , Regulación del Desarrollo de la Expresión Génica , Técnicas de Silenciamiento del Gen , Liposomas/química , Fusión de Membrana , MicroARNs/genética , Modelos Biológicos , Neuronas/metabolismo , Penetrancia , Fenotipo , Receptores Notch/metabolismo , Reproducibilidad de los Resultados , Transducción de Señal , Virus/metabolismo
10.
BMC Med Res Methodol ; 20(1): 139, 2020 06 03.
Artículo en Inglés | MEDLINE | ID: mdl-32493228

RESUMEN

BACKGROUND: We investigated the feasibility of using a machine learning tool's relevance predictions to expedite title and abstract screening. METHODS: We subjected 11 systematic reviews and six rapid reviews to four retrospective screening simulations (automated and semi-automated approaches to single-reviewer and dual independent screening) in Abstrackr, a freely-available machine learning software. We calculated the proportion missed, workload savings, and time savings compared to single-reviewer and dual independent screening by human reviewers. We performed cited reference searches to determine if missed studies would be identified via reference list scanning. RESULTS: For systematic reviews, the semi-automated, dual independent screening approach provided the best balance of time savings (median (range) 20 (3-82) hours) and reliability (median (range) proportion missed records, 1 (0-14)%). The cited references search identified 59% (n = 10/17) of the records missed. For the rapid reviews, the fully and semi-automated approaches saved time (median (range) 9 (2-18) hours and 3 (1-10) hours, respectively), but less so than for the systematic reviews. The median (range) proportion missed records for both approaches was 6 (0-22)%. CONCLUSION: Using Abstrackr to assist one of two reviewers in systematic reviews saves time with little risk of missing relevant records. Many missed records would be identified via other means.


Asunto(s)
Aprendizaje Automático , Automatización , Humanos , Reproducibilidad de los Resultados , Estudios Retrospectivos , Revisiones Sistemáticas como Asunto
11.
J Med Internet Res ; 22(7): e15121, 2020 07 23.
Artículo en Inglés | MEDLINE | ID: mdl-32706653

RESUMEN

BACKGROUND: Despite extensive literature describing the use of social media in health research, a gap exists around best practices in establishing, implementing, and evaluating an effective social media knowledge translation (KT) and exchange strategies. OBJECTIVE: This study aims to examine successes, challenges, and lessons learned from using social media within health research and to create practical considerations to guide other researchers. METHODS: The Knowledge Translation Platform of the Alberta Strategy for Patient-Oriented Research SUPPORT Unit formed a national working group involving platform staff, academics, and a parent representative with experience using social media for health research. We collected and analyzed 4 case studies that used a variety of social media platforms and evaluation methods. The case studies covered a spectrum of initiatives from participant recruitment and data collection to dissemination, engagement, and evaluation. Methods and findings from each case study as well as barriers and facilitators encountered were summarized. Through iterative discussions, we converged on recommendations and considerations for health researchers planning to use social media for KT. RESULTS: We provide recommendations for elements to consider when developing a social media KT strategy: (1) set a clear goal and identify a theory, framework, or model that aligns with the project goals and objectives; (2) understand the intended audience (use social network mapping to learn what platforms and social influences are available); (3) choose a platform or platforms that meet the needs of the intended audience and align well with the research team's capabilities (can you tap into an existing network, and what mode of communication does it support?); (4) tailor messages to meet user needs and platform requirements (eg, plain language and word restrictions); (5) consider timing, frequency, and duration of messaging as well as the nature of interactions (ie, social filtering and negotiated awareness); (6) ensure adequate resources and personnel are available (eg, content creators, project coordinators, communications experts, and audience stakeholder or patient advocate); (7) develop an evaluation plan a priori driven by goals and types of data available (ie, quantitative and qualitative); and (8) consider ethical approvals needed (driven by evaluation and type of data collection). CONCLUSIONS: In the absence of a comprehensive framework to guide health researchers using social media for KT, we provide several key considerations. Future research will help validate the proposed components and create a body of evidence around best practices for using and evaluating social media as part of a KT strategy.


Asunto(s)
Investigadores/normas , Medios de Comunicación Sociales , Investigación Biomédica Traslacional/métodos , Recursos en Salud , Humanos , Investigadores/psicología
12.
Br J Nutr ; 121(10): 1137-1145, 2019 05.
Artículo en Inglés | MEDLINE | ID: mdl-30178726

RESUMEN

The aim of this study was to characterise changes in lean soft tissue (LST) and examine the contributions of energy intake, physical activity and breast-feeding practices to LST changes at 3 and 9 months postpartum. We examined current weight, LST (via dual-energy X-ray absorptiometry), dietary intake (3-d food diary), physical activity (Baecke questionnaire) and breast-feeding practices (3-d breast-feeding diary) in forty-nine women aged 32·9 (sd 3·8) years. Changes in LST varied from -2·51 to +2·50 kg with twenty-nine women gaining LST (1·1 (sd 0·7) kg, P<0·001) and twenty women losing LST (-0·9 (sd 0·8) kg, P<0·001). Energy intake (133 (SD 42) v. 109 (SD 33) kJ/kg, P=0·019) and % kJ from fat at 3 months postpartum was higher in women who gained LST at 9 months postpartum (gained LST=34 (sd 5) % kJ; lost LST=29 (sd 4) % kJ, P=0·002). Women who gained LST reported breast-feeding their infants more frequently (gained LST=8 (sd 3) feeds/d; lost LST=5 (sd 1) feeds/d, P=0·014) and for more time per d (gained LST=115 (sd 78) min/d; lost LST=59 (sd 34) min/d, P=0·016) at 9 months postpartum. Energy intake and % kJ from fat at 3 months were significant predictors of LST gain (ß=0·08 (se 0·04) and 0·24 (se 0·09), respectively). This suggests that gain in LST may be associated with more frequent and longer episodes of breast-feeding at 9 months postpartum as well as dietary intake early in the postpartum period.


Asunto(s)
Tejido Adiposo/fisiología , Peso Corporal/fisiología , Ingestión de Energía/fisiología , Ejercicio Físico/fisiología , Periodo Posparto/fisiología , Absorciometría de Fotón , Adiposidad , Adulto , Lactancia Materna , Encuestas sobre Dietas , Femenino , Humanos , Embarazo
13.
BMC Med Res Methodol ; 18(1): 99, 2018 10 01.
Artículo en Inglés | MEDLINE | ID: mdl-30285643

RESUMEN

BACKGROUND: Consumers, clinicians, policymakers and researchers require high quality evidence to guide decision-making in child health. Though Cochrane systematic reviews (SRs) are a well-established source of evidence, little is known about the characteristics of non-Cochrane child-relevant SRs. To complement published descriptions of Cochrane SRs, we aimed to characterize the epidemiologic, methodological, and reporting qualities of non-Cochrane child-relevant SRs published in 2014. METHODS: English-language child-relevant SRs of quantitative primary research published outside the Cochrane Library in 2014 were eligible for this descriptive analysis. A research librarian searched MEDLINE, CINAHL, Web of Science, and PubMed in August 2015. A single reviewer screened articles for inclusion; a second verified the excluded studies. Reviewers extracted: general characteristics of the review; included study characteristics; methodological approaches. We performed univariate analyses and presented the findings narratively. RESULTS: We identified 1598 child-relevant SRs containing a median (IQR) 19 (11, 33) studies. These originated primarily from high-income countries (n = 1247, 78.0%) and spanned 47 of the 53 Cochrane Review Groups. Most synthesized therapeutic (n = 753, 47.1%) or epidemiologic (n = 701, 43.8%) evidence. Though 39.3% (n = 628) of SRs included evidence related to children only, few were published in pediatric-specific journals (n = 283, 17.7%). Reporting quality seemed poor based on the items we assessed; few reviews mentioned an a-priori protocol (n = 246, 15.4%) or registration (n = 111, 6.9%), and only 23.4% (n = 374) specified a primary outcome. Many SRs relied solely on evidence from non-RCTs (n = 796, 49.8%). Less than two-thirds (n = 953, 59.6%) appraised the quality of included studies and assessments of the certainty of the body of evidence were rare (n = 102, 6.4%). CONCLUSIONS: Child-relevant Cochrane SRs are a known source of high quality evidence in pediatrics. There exists, however, an abundance of evidence from non-Cochrane SRs that may be complementary. Our findings show that high-quality non-Cochrane SRs may not be practical nor easy for knowledge users to find. Improvements are needed to ensure that evidence syntheses published outside of the Cochrane Library adhere to the high standard of conduct and reporting characteristic of Cochrane SRs.


Asunto(s)
Investigación Biomédica/estadística & datos numéricos , Salud Infantil/estadística & datos numéricos , Estado de Salud , Publicaciones/estadística & datos numéricos , Proyectos de Investigación/estadística & datos numéricos , Revisiones Sistemáticas como Asunto , Niño , Humanos , MEDLINE , PubMed
14.
Can J Diet Pract Res ; 79(4): 191-195, 2018 11 01.
Artículo en Inglés | MEDLINE | ID: mdl-30014722

RESUMEN

PURPOSE: Energy metabolism is at the core of maintaining healthy body weights. Likewise, the assessment of energy needs is essential for providing adequate dietary advice. We explored differences in energy metabolism of a primigravid woman (age: 30 years) at 1 month prepregnancy ("baseline"), during pregnancy (33 weeks), and at 3 and 9 months postpartum. Measured versus estimated energy expenditure were compared using equations commonly used in clinical practice. METHODS: Energy metabolism was measured using a state-of-the-art whole body calorimetry unit (WBCU). Body composition (dual-energy X-ray absorptiometry), energy intake (3-day food records), physical activity (Baecke questionnaire), and breastmilk volume/breastfeeding energy expenditure (24-hours of infant test-retest weighing) were assessed. RESULTS: This case report is the first to assess energy expenditure in 3 different stages of a woman's life (prepregnancy, pregnancy, and postpartum) using WBCU. We noticed that weight and energy needs returned to prepregnancy values at 9 months postpartum, although a pattern of altered body composition emerged (higher fat/lean ratio) without changes in physical activity and energy intake. For this woman, current recommendations for energy overestimated actual needs by 350 kcal/day (9 months postpartum). CONCLUSION: It is likely that more accurate approaches are needed to estimate energy needs during and postpregnancy, with targeted interventions to optimize body composition.


Asunto(s)
Metabolismo Energético/fisiología , Edad Gestacional , Periodo Posparto/fisiología , Atención Preconceptiva , Adulto , Composición Corporal , Lactancia Materna , Calorimetría/métodos , Ingestión de Energía , Ejercicio Físico , Femenino , Humanos , Lactancia/fisiología , Leche Humana/fisiología , Embarazo
15.
Curr Oncol Rep ; 18(2): 8, 2016 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-26769113

RESUMEN

Measures of body weight and anthropometrics such as body mass index (BMI) are commonly used to assess nutritional status in clinical conditions including cancer. Extensive research has evaluated associations between body weight and prognosis in ovarian cancer patients, yet little is known about the potential impact of body composition (fat mass (FM) and fat-free mass (FFM)) in these patients. Thus, the purpose of this publication was to review the literature (using PubMed and EMBASE) evaluating the impact of body weight and particularly body composition on surgical complications, morbidity, chemotherapy dosing and toxicity (as predictors of prognosis), and survival in ovarian cancer patients. Body weight is rarely associated with intra-operative complications, but obesity predicts higher rates of venous thromboembolism and wound complications post-operatively in ovarian cancer patients. Low levels of FM and FFM are superior predictors of length of hospital stay compared to measures of body weight alone, but the role of body composition on other surgical morbidities is unknown. Obesity complicates chemotherapy dosing due to altered pharmacokinetics, imprecise dosing strategies, and wide variability in FM and FFM. Measurement of body composition has the potential to reduce toxicity if the results are incorporated into chemotherapy dosing calculations. Some findings suggest that excess body weight adversely affects survival, while others find no such association. Limited studies indicate that FM is a better predictor of survival than body weight in ovarian cancer patients, but the direction of this relationship has not been determined. In conclusion, body composition as an indicator of nutritional status is a better prognostic tool than body weight or BMI alone in ovarian cancer patients.


Asunto(s)
Antineoplásicos/administración & dosificación , Composición Corporal , Peso Corporal , Complicaciones Intraoperatorias/etiología , Obesidad/complicaciones , Neoplasias Ováricas/mortalidad , Antineoplásicos/farmacocinética , Índice de Masa Corporal , Relación Dosis-Respuesta a Droga , Femenino , Humanos , Complicaciones Intraoperatorias/mortalidad , Estado Nutricional , Obesidad/mortalidad , Obesidad/patología , Neoplasias Ováricas/tratamiento farmacológico , Neoplasias Ováricas/patología , Pronóstico
16.
Can J Diet Pract Res ; 77(2): 98-102, 2016 06.
Artículo en Inglés | MEDLINE | ID: mdl-26568150

RESUMEN

PURPOSE: To describe body composition (fat mass (FM) and fat-free mass (FFM)), strength, and nutritional characteristics of patients with hip or knee osteoarthritis undergoing total joint arthroplasty. METHODS: In this prospective pilot study, osteoarthritic patients underwent body composition assessment using bioelectrical impedance analysis, grip strength measurement, and completed a 24-h dietary recall during their pre-operative assessment. RESULTS: Fifty-five patients were included (∼66% females, age 43-89 years). Mean ± SD body mass index (BMI) was 32.79 ± 6.48 kg/m(2) and 62% were obese. Compared with hip osteoarthritis patients, knee osteoarthritis patients had a higher BMI (P = 0.018) and males with knee osteoarthritis had a lower grip strength (P = 0.028). There was a wide range in FM and FFM values across the BMI spectrum. Patients with a higher FM index (FMI, FM/height in m(2)) had higher levels of pain (P = 0.036) and females with higher FMI had a lower grip strength (P = 0.048). Dietary under-reporting was common and many patients did not meet recommendations for protein, vitamins C and E, or omega-3 fatty acids. Those who consumed less protein than the recommended dietary allowance were older (P = 0.018). CONCLUSIONS: A wide variability of body composition and dietary intake was observed which may impact strength and ultimately affect physical function. As such, patients with osteoarthritis may benefit from targeted nutrition and physical activity interventions before and after surgery.


Asunto(s)
Composición Corporal , Dieta , Fuerza de la Mano , Osteoartritis de la Cadera/fisiopatología , Osteoartritis de la Rodilla/fisiopatología , Adulto , Anciano , Anciano de 80 o más Años , Ácido Ascórbico/administración & dosificación , Ácido Ascórbico/análisis , Índice de Masa Corporal , Proteínas en la Dieta/administración & dosificación , Proteínas en la Dieta/análisis , Impedancia Eléctrica , Ejercicio Físico , Ácidos Grasos Omega-3/administración & dosificación , Ácidos Grasos Omega-3/análisis , Femenino , Humanos , Masculino , Recuerdo Mental , Persona de Mediana Edad , Estado Nutricional , Obesidad/fisiopatología , Proyectos Piloto , Estudios Prospectivos , Ingesta Diaria Recomendada , Vitamina E/administración & dosificación , Vitamina E/análisis
17.
Eur J Nutr ; 54(8): 1323-32, 2015 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-25504446

RESUMEN

PURPOSE: In Caucasian women, research has shown that energy balance and taste preference change throughout the menstrual cycle. However, the contributory role of the menstrual cycle to obesity and insulin resistance among Asian women remains unclear. We investigate the impact of the menstrual cycle on energy balance and taste preference in Singaporean Chinese females. METHODS: Thirty-one healthy young Chinese female subjects with regular menstrual cycles were recruited. Anthropometrics, body composition, energy intake, resting metabolic rate, premenstrual syndrome (PMS) severity and taste preference to sucrose were assessed during three phases (menses, follicular and luteal), over one (N = 18) to two (N = 13) menstrual cycles. RESULTS: For all subjects (N = 31), we found significant reductions in energy, fat intake (p < 0.05) and taste preference for sucrose (p < 0.05) in the luteal phase compared to early follicular phase as far as Cycle 1 is concerned. No significant differences were observed for carbohydrate and protein intake as well as PMS score. In those evaluated for two full cycles (N = 13), we found that taste preference for sucrose and PMS score were significantly higher in the menstrual phase in Cycle 2 (p < 0.05). No significant differences were observed in energy and macronutrient intake throughout Cycle 2. RMR was similar across the three phases. However, non-significant cyclic variations were noted within and between the cycles. CONCLUSION: Cyclic variations in energy intake and expenditure contributed by sensory and behavioural changes occur during the menstrual cycle. Whether this contributes to cyclic weight gain is speculative and remains to be proven. Further research in non-Caucasians spanning more than one menstrual cycle is needed to establish the impact of the menstrual cycle on taste preference and energy balance.


Asunto(s)
Pueblo Asiatico , Ingestión de Energía , Metabolismo Energético , Ciclo Menstrual/fisiología , Gusto , Adulto , Metabolismo Basal , Composición Corporal , Carbohidratos de la Dieta/administración & dosificación , Grasas de la Dieta/administración & dosificación , Proteínas en la Dieta/administración & dosificación , Femenino , Fase Folicular/fisiología , Humanos , Resistencia a la Insulina , Fase Luteínica/fisiología , Síndrome Premenstrual/diagnóstico , Singapur , Sacarosa/administración & dosificación , Encuestas y Cuestionarios , Adulto Joven
18.
JMIR Form Res ; 8: e53593, 2024 Mar 20.
Artículo en Inglés | MEDLINE | ID: mdl-38506915

RESUMEN

BACKGROUND: The eCOVID19 Recommendations Map & Gateway to Contextualization (RecMap) website was developed to identify all COVID-19 guidelines, assess the credibility and trustworthiness of the guidelines, and make recommendations understandable to various stakeholder groups. To date, little has been done to understand and explore parents' experiences when accessing and using the RecMap website for COVID-19 health decision-making. OBJECTIVE: To explore (1) where parents look for COVID-19 health information and why, (2) parents' user experience when accessing and using the RecMap website to make health decisions, and (3) what knowledge mobilization activities are needed to increase parents' awareness, use, and engagement with the RecMap website. METHODS: We conducted a qualitative descriptive study using semistructured interviews and a think-aloud activity with parents of children aged 18 years or younger living in Canada. Participants were asked to provide feedback on the RecMap website and to "think aloud" as they navigated the website to find relevant COVID-19 health recommendations. Demographic information was collected using a web-based questionnaire. A hybrid deductive and inductive thematic approach guided analysis and data synthesis. RESULTS: A total of 21 participants (13/21, 62% mothers) were interviewed and participated in a think-aloud activity. The data were categorized into four sections, representative of key elements that deductively and inductively emerged from the data: (1) parent information seeking behaviors and preferences for COVID-19, (2) RecMap website usability, (3) perceived usefulness of the RecMap website, and (4) knowledge mobilization strategies to increase awareness, use, and engagement of the RecMap website. Parents primarily used the internet to find COVID-19 information and focused on sources that they determined to be credible, trustworthy, simple, and engaging. As the pandemic evolved, participants' information-seeking behaviors changed, specifically their topics of interest and search frequency. Most parents were not aware of the RecMap website before this study but found satisfaction with its concept and layout and expressed intentions to use and share it with others. Parents experienced some barriers to using the RecMap website and suggested key areas for improvement to facilitate its usability and perceived usefulness. Recommendations included a more user-friendly home page for lay audiences (separate public-facing user interface), improving the search and filter options, quicker navigation, clearer titles, more family-friendly graphics, and improving mobile-friendly access. Several strategies to disseminate the RecMap website were also expressed, including a mix of traditional and nontraditional methods (handouts and social media) in credible and high-traffic locations that parents frequent often. CONCLUSIONS: Overall, parents liked the concept of the RecMap website but had some suggestions to improve its usability (language, navigation, and website interface). These findings can be used to improve the RecMap website for parents and offer insight for the development and dissemination of effective web-based health information tools and resources for the general public.

19.
Arch Public Health ; 82(1): 111, 2024 Jul 22.
Artículo en Inglés | MEDLINE | ID: mdl-39034399

RESUMEN

BACKGROUND: Connecting end-users to research evidence has the power to improve patient knowledge and inform health decision-making. Differences in the culture and language of the end users may shape the effectiveness of knowledge mobilization (KMb). This scoping review set out to understand current approaches and methods when creating or adapting KMb products for culturally and linguistically diverse (CALD) audiences. METHODS: We searched 3 databases (Ovid Medline, CINAHL via EBSCOhost, PsychINFO) from 2011 until August 2023. We included any literature about KMb product creation or adaptation processes serving CALD communities. A primary reviewer screened all identified publications and a second reviewer screened publications excluded by the primary. Data were extracted using a standardized form by one reviewer and verified by a second reviewer. Studies were categorized by type of adaptations ('surface' and/or 'deep' structure) and mapped based on type of stakeholder engagement used in the research approach (i2S model), and end-user involvement (content, design, evaluation and dissemination) in KMb product creation or adaptation. RESULTS: Ten thousand two hundred ninety-nine unique titles and abstracts were reviewed, 670 full-text studies were retrieved and reviewed, and 78 studies were included in final data extraction and mapping. Twenty-four studies (31%) created or adapted exclusively text-based KMb products such as leaflets and pamphlets and 49 (63%) produced digital products such as videos (n = 16, 33%), mobile applications (n = 14, 29%), and eHealth websites (n = 7, 14%). Twenty-five studies (32%) reported following a framework or theory for their creation or adaptation efforts. Twenty-eight studies (36%) engaged stakeholders in the research approach. Nearly all (96%) involved end-users in creating or adapting the KMb products through involvement in content development (n = 64), design features (n = 52), evaluation (n = 44) and dissemination (n = 20). Thirty-two (41%) studies included reflections from the research teams on the processes for creating or adapting KMb products for CALD communities. CONCLUSION: Included studies cited a variety of methods to create or adapt KMb products for CALD communities. Successful uptake of created or adapted KMb products was often the result of collaboration and involvement with end-users for more applicable, accessible and meaningful products. Further research developing guidance and best practices is needed to support the creation or adaptation of KMb products with CALD communities. REGISTRATION: Protocol submitted to Open Science Framework on August 16, 2022 ( https://osf.io/9jcw4/ ).

20.
J Child Health Care ; : 13674935241238794, 2024 Mar 19.
Artículo en Inglés | MEDLINE | ID: mdl-38503453

RESUMEN

Effects of the Coronavirus disease 2019 (COVID-19) pandemic on children stem beyond immediate infectious and post-infectious risks. Our aim was to conduct a scoping review and produce an online Interactive Evidence Map (IEM) highlighting available literature around unintended effects of the pandemic on children's and adolescents' mental, psychosocial, and physical health. A search was run monthly in MEDLINE, PsycINFO, CENTRAL, and Cochrane COVID-19 Study Register from May 1st 2021 through April 30th 2022. All articles involving children and adolescents under 18 years of age relating to any unintended mental, psychosocial, and physical health consequences of the pandemic and resultant restrictions were included. Data were extracted and topics categorized, with corresponding data uploaded into EPPI-Reviewer and transferred to EPPI-Mapper for visualization. A total of 14,555 citations were screened and 826 (6%) articles included. Most articles reported on mental health outcomes, particularly anxiety (n = 309, 37%) and depression (n = 294, 36%). Psychosocial outcomes related to lockdowns such as loneliness (n = 120, 15%) and impact on adolescent relationships with others (n = 149, 18%) were also reported. Fewer articles examined physical consequences, but those that did mostly focused on child abuse (n = 73, 9%). Overall, currently mapped literature focuses on consequences related to mental health outcomes such as anxiety and depression.

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