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1.
Cereb Cortex ; 33(14): 9144-9153, 2023 07 05.
Artículo en Inglés | MEDLINE | ID: mdl-37259175

RESUMEN

The default mode network is essential for higher-order cognitive processes and is composed of an extensive network of functional and structural connections. Early in fetal life, the default mode network shows strong connectivity with other functional networks; however, the association with structural development is not well understood. In this study, resting-state functional magnetic resonance imaging and anatomical images were acquired in 30 pregnant women with singleton pregnancies. Participants completed 1 or 2 MR imaging sessions, on average 3 weeks apart (43 data sets), between 28- and 39-weeks postconceptional ages. Subcortical volumes were automatically segmented. Activation time courses from resting-state functional magnetic resonance imaging were extracted from the default mode network, medial temporal lobe network, and thalamocortical network. Generalized estimating equations were used to examine the association between functional connectivity strength between default mode network-medial temporal lobe, default mode network-thalamocortical network, and subcortical volumes, respectively. Increased functional connectivity strength in the default mode network-medial temporal lobe network was associated with smaller right hippocampal, left thalamic, and right caudate nucleus volumes, but larger volumes of the left caudate. Increased functional connectivity strength in the default mode network-thalamocortical network was associated with smaller left thalamic volumes. The strong associations seen among the default mode network functional connectivity networks and regionally specific subcortical volume development indicate the emergence of short-range connectivity in the third trimester.


Asunto(s)
Red en Modo Predeterminado , Lóbulo Temporal , Embarazo , Humanos , Femenino , Imagen por Resonancia Magnética/métodos , Hipocampo , Encéfalo/diagnóstico por imagen , Mapeo Encefálico
2.
J Res Adolesc ; 34(1): 85-95, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-37975498

RESUMEN

Peer victimization can negatively impact emotion regulation in youth and is associated with harmful mental health outcomes. One protective factor against the impacts of peer victimization is a strong attachment to family and positive peer relationships. Given that pets are commonly seen as family members and that youth report turning to their pet for emotional comfort, companion animals could provide an avenue of support for youth experiencing victimization. A geographically diverse sample of 5725 adolescents in the United States from the Adolescent Brain Cognitive Development (ABCD) Study® was used to explore whether the relationship between peer victimization and emotion regulation was moderated by whether a pet lives in the home. Having a pet in the home did not moderate the relationship between peer victimization and emotion regulation; however, mean-level differences were present across types of household pet (i.e., youth with no pets, youth with at least one dog, and youth with non-dog pets). Participants who did not live with a companion animal showed higher levels of both maladaptive emotion regulation (expressive suppression) and adaptive emotion regulation (cognitive reappraisal), suggesting that having a pet might lower overall emotion regulation pathways regardless of adaptive directionality. Relational victimization was a significant predictor of expressive suppression regardless of whether there was a pet in the home, although overt victimization was not a predictor of either kind of emotion regulation. This research demonstrates the complex nature of human-animal relationships and suggests more research is needed to understand the nuanced relationship between pets, peer victimization, and emotion regulation.


Asunto(s)
Víctimas de Crimen , Regulación Emocional , Humanos , Adolescente , Estados Unidos/epidemiología , Animales , Perros , Mascotas , Emociones , Grupo Paritario , Víctimas de Crimen/psicología
3.
J Adolesc ; 95(6): 1152-1167, 2023 08.
Artículo en Inglés | MEDLINE | ID: mdl-37165514

RESUMEN

INTRODUCTION: Relationships with companion animals have been associated with higher levels of prosocial behavior and lower levels of socioemotional difficulties for children and adolescents. Companion animals may be supportive of developing prosocial behavior in youth through practice with positive social interactions and the development of empathy and reciprocity skills. The goal of this study was to use a person-centered approach to investigate if living with a pet (including pet species) is associated with profiles of adolescent peer social behaviors (i.e., prosocial, aggressive), and size of their peer network. METHODS: This study used data from the Adolescent Brain Cognitive Development (ABCD) Study®, a large, nationally representative data set of American adolescents. RESULTS: In a cross-sectional sample of 5218 adolescents, we found that youth clustered into four different distinct profiles of peer social behavior. Female youth living with dogs were less likely to be in the High Aggression profile as compared to youth without pets or youth with other types of pets. However, having a pet was not associated with whether youth were in the profiles characterized by prosocial behaviors or size of peer network. CONCLUSIONS: Overall, future research should explore how gender intersects with companion animal interactions-both in terms of frequency of interactions as well as relationship quality/emotional attachment-as well as examine these relationships over time to assess causality.


Asunto(s)
Conducta del Adolescente , Mascotas , Humanos , Femenino , Animales , Perros , Adolescente , Estudios Transversales , Conducta Social , Grupo Paritario , Agresión/psicología , Conducta del Adolescente/psicología
4.
Appetite ; 173: 105976, 2022 06 01.
Artículo en Inglés | MEDLINE | ID: mdl-35245643

RESUMEN

The COVID-19 pandemic caused widespread non-essential business closures in the U.S., which may have disproportionately impacted food consumption in lower-income communities, in part due to reduced access to healthy and affordable foods, as well as occupations that may have required working outside the home. The aims of this study were to examine restaurant dining behaviors (including drive-through, takeout, and delivery) at fast-food and non-fast-food (i.e., fast casual and full-service ['other']) restaurants and the impact on diet quality among racially/ethnically diverse low-income adults during the early months of the pandemic. Participants completed an online survey using CloudResearch regarding restaurant dining behaviors in the past week (during June 2020) and during a typical week prior to the pandemic. Diet quality was measured using the Prime Diet Quality Score (PDQS). Surveys from 1,756 low-income adults (incomes <250% of the Federal Poverty Level) were analyzed using chi-squared tests to examine differences in demographic characteristics among those dining at restaurants during the pandemic, as well as to examine differences in dining frequency compared with prior to COVID-19. Negative binomial regressions were used to examine the mean frequency of eating food from fast-food and other restaurants, adjusted for socio-demographic characteristics. This study found reductions in fast-food and other restaurant dining compared with prior to COVID-19, although overall restaurant consumption remained high with over half of participants reporting fast-food consumption in the week prior (average consumption of twice per week). Greater fast-food consumption was associated with poorer diet quality. In conclusion, while fast-food consumption was slightly lower during the pandemic, the overall high levels observed among socioeconomically disadvantaged adults remains concerning, highlighting the continued need for initiatives and policies to encourage greater access to and consumption of affordable and healthier foods.


Asunto(s)
COVID-19 , Restaurantes , Adulto , COVID-19/epidemiología , Ingestión de Energía , Comida Rápida , Humanos , Pandemias , Pobreza , Estados Unidos/epidemiología
5.
Curr Sports Med Rep ; 21(1): 18-27, 2022 Jan 01.
Artículo en Inglés | MEDLINE | ID: mdl-35018895

RESUMEN

ABSTRACT: Higher youth physical activity (PA) is associated with favorable health outcomes. The PA Guidelines for Americans recommend school-aged children complete at least 60 minutes of daily PA. Only one in three children meet these guidelines. Dog walking and play are potential strategies to increase youth PA. This scoping review summarizes the existing literature on familial dog ownership and youth PA levels and identifies gaps in the literature to inform future studies. Of nine studies that compared PA levels among youth with and without dogs, 77.8% reported a positive association between dog ownership and PA. The majority of studies investigating dog ownership and youth PA are cross-sectional and suggest dog ownership is associated with increased youth PA. Longitudinal studies are needed to determine whether the relationship is causal. Interventions to increase dog-facilitated PA in youth also are needed. Future studies should examine the dog ownership-PA relationship in low-income and minority youth.


Asunto(s)
Propiedad , Mascotas , Animales , Estudios Transversales , Perros , Grupos Minoritarios , Caminata
6.
Anthrozoos ; 35(5): 693-712, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36387418

RESUMEN

The COVID-19 pandemic has resulted in significant social disruptions for youth caused by lockdowns, school closures, and a lack of in-person social interactions. Companion animals are prevalent in US households and may provide a source of emotional support and motivation for youth to engage in adaptive coping behaviors during social challenges. The goals of this study were to assess if dog owners, non-dog pet owners, and non-pet owners differed in stress levels, positive affect, and use of adaptive coping strategies such as increased time outdoors, regular walking, and healthy behaviors. This study used data collected during the COVID-19 pandemic from the Adolescent Brain Cognitive DevelopmentSM (ABCD) Study, a large, nationally representative dataset of American youth. In a cross-sectional sample of 6,069 adolescents, there were significant, but small, relationships between owning a non-dog pet and lower levels of positive affect, and both dog owners and non-dog pet owners reported higher perceived stress compared with non-pet owners. Dog ownership was associated with higher odds of using healthy coping strategies compared with non-pet owners, but this relationship was not significant when controlling for demographic variables. Dog owners reported higher odds of having a walking routine and spending time outdoors compared with non-pet owners. Overall, the results suggest no buffering effect of pet ownership on youth mental wellbeing, but dog ownership is associated with some healthy coping behaviors linked to walking.

7.
Perception ; 50(5): 387-398, 2021 May.
Artículo en Inglés | MEDLINE | ID: mdl-33951950

RESUMEN

Adults describe abstract shapes moving in a goal-directed manner using animate terms. This study tested which variables affect school-aged children's descriptions of moving geometrical shapes. Children aged 5 to 9 years were shown displays of interacting geometrical shapes and were asked to describe them. Across participants, instructions, number of moving figures, whether a figure caught another, and complexity of the scene were manipulated. Nine-year-olds used significantly more animate phrases than 5-year-olds. Furthermore, we found an Age by Condition interaction. Five-year-olds made significantly more animate statements in the animate condition, while 7-year-olds and 9-year-olds were less affected by instructions. Scene complexity increased children's use of animate phrases. Number of agents present on the screen and whether a catch occurred did not impact children's animate attributions. Our results support the hypothesis that children, like adults, are attuned to animacy cues and describe chasing agents in animate terms.


Asunto(s)
Percepción de Movimiento , Adulto , Niño , Preescolar , Señales (Psicología) , Humanos , Motivación , Percepción Social
8.
J Nutr ; 150(2): 404-410, 2020 02 01.
Artículo en Inglés | MEDLINE | ID: mdl-31586209

RESUMEN

BACKGROUND: Quick-service restaurants (QSRs) serve one-third of US children on any given day, yet no methods can directly measure energy (kcal) consumed in QSRs. Weighed plate waste is one feasible option, but the accuracy is unknown. OBJECTIVE: The objective of this study was to determine the accuracy of weighed plate waste for measuring children's energy consumption in QSRs. METHODS: Children's plate waste (entrées and sides) was collected for a larger study assessing a community-wide health messaging campaign to inform parents' orders for children in QSRs; a subsample (n = 194) was used for validation. Gross energy left over estimated by weighed plate waste combined with restaurant-stated nutrition information was compared to gross energy determined by bomb calorimetry, the gold-standard energy assessment technique. Analyses were conducted at the meal level (all food items, combined) and stratified by the number of items per meal (1, 2, or 3). Pearson correlations and paired t tests analyzed agreement; Bland-Altman statistics examined differences between energy estimations for the total and stratified subsample. RESULTS: Overall, significant agreement was observed between weighed plate waste and bomb calorimetry (r = 0.99, P < 0.001). On average, weighed plate waste underestimated energy content by <2 kcal compared with bomb calorimetry (mean percent difference ± SD of 0.3% ± 10.7%); 94% of estimations fell within the limits of agreement (-23.5 to 26.8 kcal), and 63% and 24% of estimations differed by <10 or <20 net kcal, respectively. Although stratification by item number showed slight variation, mean differences for all strata were <5 kcal (t test P > 0.80), suggesting the accuracy of weighed plate waste for measuring meals of various sizes. CONCLUSIONS: Weighed plate waste is an accurate and valid field technique for measuring children's energy consumption from food in QSRs. Future improvements to capturing beverages, self-serve condiments, and sharing behaviors may improve the overall feasibility and accuracy.


Asunto(s)
Ingestión de Energía , Comidas , Restaurantes , Niño , Preescolar , Promoción de la Salud , Humanos
9.
Am J Public Health ; 109(2): 267-269, 2019 02.
Artículo en Inglés | MEDLINE | ID: mdl-30571297

RESUMEN

OBJECTIVES: To describe time trends in the availability of healthier children's menu items in the top selling quick service restaurant (QSR) chains. METHODS: We used Technomic Inc.'s MenuMonitor to construct a data set of side and beverage items available on children's menus from 2004 to 2015 at 20 QSR chains in the United States. We evaluated the significance of time trends in the average availability of healthier fruit and nonfried vegetable sides and nonsugary beverages offered as options and by default in children's meal bundles. RESULTS: Healthier sides and beverages offered as options increased by 57.5 and 25.0 percentage points, respectively, from 2004 to 2015 but leveled off starting in 2013. Healthier items bundled by default also increased during this time frame, with most adoption occurring after 2010. However, these items remain relatively uncommon, with less than 20% of meal bundles including healthier items by default. All tests evaluating time trends in the availability of healthier items in meal bundles were significant at P < .001. CONCLUSIONS: The QSRs evaluated made improvements in the quality of sides and beverages offered on children's menus from 2004 to 2015. Additional efforts are needed to increase the percentage of healthier options offered by default.


Asunto(s)
Comida Rápida/estadística & datos numéricos , Promoción de la Salud/estadística & datos numéricos , Restaurantes/estadística & datos numéricos , Bebidas , Niño , Abastecimiento de Alimentos/estadística & datos numéricos , Frutas , Promoción de la Salud/métodos , Humanos , Verduras
10.
J Vet Med Educ ; 46(2): 145-152, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-30565979

RESUMEN

Wellness and work-life balance are prominent concerns in the veterinary profession and data suggest that personal relationship-building with peers and family assist veterinary trainees and veterinarians with wellness. The demographics of veterinary medical trainees (students, interns, and residents) have shifted to a female-dominated cohort and veterinary training overlaps with peak reproductive age for the majority of trainees. Despite a robust body of literature in the human medical profession surrounding pregnancy, parenting, and family planning (PPFP) among human medical students, interns, and residents, no comparable data exist within the United States veterinary medical community. This study reviewed policies and support services in place to support PPFP at accredited United States veterinary medical training institutions through the use of an online administrator survey and the review of handbooks and relevant written material. Results from this study highlight a lack of consistency across veterinary medical training institutions for policy and support services for PPFP for trainees, especially related to lactation support and parental leave. Our data can help facilitate the development of standards or best practices for policies and support services that support PPFP among veterinary medical trainees, and opens the dialogue to consider the unique needs of our shifted trainee demographics.


Asunto(s)
Educación en Veterinaria , Internado y Residencia , Estudiantes de Medicina , Equilibrio entre Vida Personal y Laboral , Femenino , Humanos , Masculino , Responsabilidad Parental , Embarazo , Estados Unidos , Veterinarios/psicología
11.
BMC Public Health ; 18(1): 305, 2018 03 09.
Artículo en Inglés | MEDLINE | ID: mdl-29519232

RESUMEN

BACKGROUND: We focused on human-animal interaction (HAI) as an important aspect of social functioning at the individual level, framing this emerging field from a public health perspective. METHODS: Using data from the Health and Retirement Study (HRS) 2012 HAI module, we describe the characteristics of pet ownership in a population of older adults, and examine the relation between pet ownership and multiple mental and physical health indicators such as health status, depression, and physical activity. RESULTS: Of the 1657 participants in our subsample, approximately half (51.5%) reported being pet owners; the majority owned dogs or cats, and most had only one pet. Pet ownership was significantly associated with a higher likelihood of ever having had depression, with pet owners being 1.89 times more likely to have experienced depression. However, pet ownership was not associated with having experienced depression within the last week. CONCLUSIONS: The findings from this study could indicate a relationship between pet ownership and depression, but it is impossible to determine the directionality of that relationship. It is possible that owning a pet may put a person at an increased risk of developing depression, or individuals who are at risk, or who have already developed depression, may acquire a pet as a way of managing their depressive symptoms. The findings of this study provide an initial step in contributing to our understanding of the relationship between companion animals and the social, physical, and mental well-being of the HRS study population. Future research should include measures of HAI in longitudinal, population-based surveys.


Asunto(s)
Depresión/epidemiología , Vínculo Humano-Animal , Propiedad/estadística & datos numéricos , Determinantes Sociales de la Salud , Anciano , Anciano de 80 o más Años , Animales , Gatos , Perros , Femenino , Humanos , Estudios Longitudinales , Masculino , Persona de Mediana Edad , Estados Unidos/epidemiología
12.
BMC Public Health ; 18(1): 992, 2018 Aug 30.
Artículo en Inglés | MEDLINE | ID: mdl-30165828

RESUMEN

BACKGROUND: The majority of US children do not meet physical activity recommendations. Schools are an important environment for promoting physical activity in children, yet most school districts do not offer enough physical activity opportunities to meet recommendations. This study aimed to identify school districts across the country that demonstrated exemplary efforts to provide students with many physical activity opportunities and to understand the factors that facilitated their programmatic success. METHODS: A total of 59 districts were identified as model districts by members of the Physical Activity and Health Innovation Collaborative, an ad hoc activity associated with the Roundtable on Obesity Solutions at the National Academies of Sciences, Engineering, and Medicine. Semi-structured interviews were conducted with consenting stakeholders from 23 school districts to understand physical education and activity efforts and elucidate factors that led to the success of these districts' physical activity programming. Districts were geographically and socioeconomically diverse and varied in their administrative and funding structure. RESULTS: Most districts did not offer the recommended 150 or 225 min of physical activity a week through physical education alone; yet all districts offered a range of programs outside of physical education that provided additional opportunities for students to be physically active. The average number of school-based physical activity programs offered was 5.5, 3.5 and 2.1 for elementary, middle and high schools, respectively. Three overarching and broadly relevant themes were identified that were associated with successfully enhancing physical activity opportunities for students: soliciting and maintaining the support of champions, securing funding and/or tangible support, and fostering bi-directional partnerships between the district and community organizations and programs. Not only were these three themes critical for the development of physical activity opportunities, but they also remained important for the implementation, evaluation and sustainability of programs. These themes also did not differ substantially by the socioeconomic status of districts. CONCLUSIONS: These findings demonstrate the success of school districts across the nation in providing ample opportunities for physical activity despite considerable variability in socioeconomic status and resources. These results can inform future research and provide actionable evidence for school districts to enhance physical activity opportunities to students.


Asunto(s)
Ejercicio Físico , Política de Salud , Educación y Entrenamiento Físico/organización & administración , Instituciones Académicas/organización & administración , Adolescente , Niño , Humanos , Evaluación de Programas y Proyectos de Salud , Investigación Cualitativa , Instituciones Académicas/estadística & datos numéricos , Factores Socioeconómicos , Estados Unidos
13.
Public Health Nutr ; 20(5): 774-785, 2017 04.
Artículo en Inglés | MEDLINE | ID: mdl-27745562

RESUMEN

OBJECTIVE: The present study investigated whether parent/child pairs would select more healthful foods when: (i) products were labelled with front-of-package (FOP) nutrition labels relative to packages without labels; (ii) products were labelled with colour-coded Multiple Traffic Light (MTL) FOP labels relative to monochromatic Facts up Front (FuF) FOP labels; and (iii) FOP labels were explained via in-aisle signage v. unexplained. DESIGN: Participants were randomly assigned to one of five conditions: (i) FuF labels with in-aisle signs explaining the labels; (ii) FuF labels, no signage; (iii) MTL labels with in-aisle signage; (iv) MTL labels, no signage; (v) control group, no labels/signage. Saturated fat, sodium, sugar and energy (calorie) content were compared across conditions. SETTING: The study took place in a laboratory grocery aisle. SUBJECTS: Parent/child pairs (n 153) completed the study. RESULTS: Results did not support the hypothesis that MTL labels would lead to more healthful choices than FuF labels. The presence of FOP labels did little to improve the healthfulness of selected foods, with few exceptions (participants with v. without access to FOP labels selected lower-calorie cereals, participants with access to both FOP labels and in-aisle explanatory signage selected products with less saturated fat v. participants without explanatory signage). CONCLUSIONS: Neither MTL nor FuF FOP labels led to food choices with significantly lower saturated fat, sodium or sugar. In-aisle signs explaining the FOP labels were somewhat helpful to consumers in making more healthful dietary decisions. New FOP labelling programmes could benefit from campaigns to increase consumer awareness and understanding of the labels.


Asunto(s)
Conducta de Elección , Comportamiento del Consumidor , Etiquetado de Alimentos , Preferencias Alimentarias , Valor Nutritivo , Adulto , Niño , Dieta Saludable , Femenino , Conductas Relacionadas con la Salud , Conocimientos, Actitudes y Práctica en Salud , Humanos , Masculino , Persona de Mediana Edad , Padres , Factores Socioeconómicos
14.
BMC Public Health ; 17(1): 259, 2017 03 15.
Artículo en Inglés | MEDLINE | ID: mdl-28298184

RESUMEN

BACKGROUND: Children regularly consume foods from quick-service restaurants (QSR), but little is known about the foods that children order, the calories and nutrients consumed, the accuracy of stated calorie information, or the ability to assess food orders and consumption in QSRs. This study evaluated the feasibility of plate waste collection in QSRs and examined children's orders and consumption of meals from the standard and children's menus. Additional aims were to examine if the meals ordered met healthier standards for children's menu items and determine the accuracy of the QSR-stated energy content of foods. METHODS: Fifteen QSRs, two malls, and 116 eligible parents were approached to participate in the study in 2015. Among the families recruited, children's meal orders and consumption were analyzed using plate waste methodology, and a subsample of foods was analyzed using bomb calorimetry in 2015. RESULTS: Two individual QSRs and one mall food court with two QSRs agreed to participate, and n = 50 participants (parents with children between the ages of 5-10 years) were recruited. Children consumed on average 519 calories, 5.7 g saturated fat, 957 mg sodium, 3.7 g fiber, and 22.7 g sugar. Children ordered and consumed significantly fewer calories and less sodium and sugar with meals ordered exclusively from the children's menu compared with the standard menu. Overall there were no significant differences between the measured and stated energy contents of the QSR foods. CONCLUSIONS: Conducting plate waste research in QSRs is feasible and there is concordance with stated calorie information. Consuming foods exclusively from the children's menu may help limit overconsumption in QSRs.


Asunto(s)
Ingestión de Alimentos , Comida Rápida/análisis , Conducta Alimentaria , Residuos de Alimentos , Restaurantes/estadística & datos numéricos , Niño , Ingestión de Energía , Estudios de Factibilidad , Femenino , Humanos , Masculino , Comidas , Proyectos Piloto
15.
J Vet Med Educ ; 44(2): 229-233, 2017.
Artículo en Inglés | MEDLINE | ID: mdl-27415036

RESUMEN

Animal-assisted activities (AAA) and animal-assisted therapy (AAT) programs are increasing in popularity, but current programs vary in their safety and health policies. Veterinarians can have an important role in ensuring the safety of both the animals and humans involved, but it is unclear how best to educate veterinary students to serve effectively in this role. Therefore, the goal of this study was to assess the knowledge gaps and perceptions of first-year veterinary students on health and safety aspects of AAA/AAT programs by administering a survey. This information could then guide future educational training in veterinary schools to address the knowledge gaps in this area. Formal education during the veterinary curriculum had not yet been provided to these students on AAA/AAT before the survey. Of 98 first-year veterinary students, 91 completed the survey. When asked about policies on visiting animals, 58% of students responded that nursing homes are required to have a policy and 67% responded that hospitals are required to have one. Three quarters of students reported that veterinarians, animal handlers, and facilities should share the responsibility for ensuring safe human-animal interaction in AAA/AAT programs. Most (82%) of the students responded that all or most national and local therapy animal groups prohibit animals that consume raw meat diets from participating in AAA/AAT programs. The results of this survey will help veterinary schools better identify knowledge gaps that can be addressed in veterinary curricula so future veterinarians will be equipped to provide appropriate public health information regarding AAA/AAT programs.


Asunto(s)
Terapia Asistida por Animales , Bienestar del Animal , Educación en Veterinaria , Vínculo Humano-Animal , Rol del Médico , Animales , Hospitales , Humanos , Casas de Salud , Estudiantes de Medicina
16.
Curr Psychol ; : 1-5, 2022 Jan 20.
Artículo en Inglés | MEDLINE | ID: mdl-35075340
17.
Int J Behav Nutr Phys Act ; 13: 39, 2016 Mar 22.
Artículo en Inglés | MEDLINE | ID: mdl-27000400

RESUMEN

BACKGROUND: Increasing physical activity (PA) during the school day and out-of-school time are critical strategies for preventing childhood obesity and improving overall health. The purpose of the present investigation was to examine schoolchildren's volume and type of PA during school-time and out-of-school, compared to national recommendations and differences by sex and weight status. METHODS: This cross-sectional analysis included 517 3(rd)-5(th) grade schoolchildren from 13 New England elementary schools (October 2013-January 2014). Demographics were collected by parent questionnaire. Measured height and weight were used to categorize child weight status. Accelerometer data were collected over 7 days. PA was coded as total activity counts and minutes of sedentary, light, and moderate-to-vigorous physical activity (SED, LPA, MVPA) during 1) school, 2) weekday out-of-school, 3) weekend, and 4) total daily time. Multivariable mixed models were used to examine associations between sex and weight status and total counts, SED, LPA, and MVPA, controlling for demographics, wear-time, and clustering within schools. RESULTS: 453 participants (60.5% girls; mean age 9.1 years; 30.5% overweight/obese) had valid accelerometer wear time (≥3 days, ≥ 10 h/day). Few children achieved 60 min total daily (15.0%) or school-time (8.0 %) MVPA recommendations. For all time-of-day categories, girls achieved fewer MVPA minutes than boys (p < .0001), and overweight/obese participants achieved fewer MVPA minutes than normal/underweight participants (p = 0.05). Minutes of LPA declined by grade-level (p < .05) and were lower in girls than boys during school-time only (p < .05). CONCLUSION: Disparities in MVPA by sex and weight status across school and out-of-school time highlight the need for programs with equitable reach.


Asunto(s)
Ejercicio Físico , Actividades Recreativas , Obesidad Infantil , Instituciones Académicas , Peso Corporal , Niño , Estudios Transversales , Femenino , Humanos , Masculino , Actividad Motora , New England , Sobrepeso , Obesidad Infantil/prevención & control , Esfuerzo Físico , Factores Sexuales , Delgadez
18.
Proc Biol Sci ; 281(1794): 20141799, 2014 Nov 07.
Artículo en Inglés | MEDLINE | ID: mdl-25232140

RESUMEN

Pollinators contribute around 10% of the economic value of crop production globally, but the contribution of these pollinators to human nutrition is potentially much higher. Crops vary in the degree to which they benefit from pollinators, and many of the most pollinator-dependent crops are also among the richest in micronutrients essential to human health. This study examines regional differences in the pollinator dependence of crop micronutrient content and reveals overlaps between this dependency and the severity of micronutrient deficiency in people around the world. As much as 50% of the production of plant-derived sources of vitamin A requires pollination throughout much of Southeast Asia, whereas other essential micronutrients such as iron and folate have lower dependencies, scattered throughout Africa, Asia and Central America. Micronutrient deficiencies are three times as likely to occur in areas of highest pollination dependence for vitamin A and iron, suggesting that disruptions in pollination could have serious implications for the accessibility of micronutrients for public health. These regions of high nutritional vulnerability are understudied in the pollination literature, and should be priority areas for research related to ecosystem services and human well-being.


Asunto(s)
Productos Agrícolas/provisión & distribución , Abastecimiento de Alimentos/estadística & datos numéricos , Salud Global , Desnutrición/epidemiología , Micronutrientes/deficiencia , Polinización , Deficiencia de Ácido Fólico , Humanos , Deficiencias de Hierro , Micronutrientes/metabolismo , Prevalencia , Oligoelementos/deficiencia , Oligoelementos/metabolismo , Deficiencia de Vitamina A/epidemiología
19.
J Youth Adolesc ; 43(1): 81-91, 2014 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-23430563

RESUMEN

Entrepreneurship represents a form of adaptive developmental regulation through which both entrepreneurs and their ecologies benefit. We describe entrepreneurship from the perspective of relational developmental systems theory, and examine the joint role of personal attributes, contextual attributes, and characteristics of person-context relationships in predicting entrepreneurial intent in a sample 3,461 college students enrolled in colleges and universities in the United States (60 % female; 61 % European American). Specifically, we tested whether personal characteristics (i.e., gender, intentional self-regulation skills, innovation orientation) and contextual factors (i.e., entrepreneurial parents) predicted college students' intentions to pursue an entrepreneurial career. Our findings suggest that self-regulation, innovation orientation, and having entrepreneurial role models (i.e., parents) predict entrepreneurial intent. Limitations and future directions for the study of youth entrepreneurship are discussed.


Asunto(s)
Conducta del Adolescente , Emprendimiento , Intención , Psicología del Adolescente , Controles Informales de la Sociedad , Adolescente , Análisis Factorial , Femenino , Humanos , Masculino , Modelos Psicológicos , Modelos Estadísticos , Padres , Análisis de Regresión , Factores Sexuales , Adulto Joven
20.
J Youth Adolesc ; 43(6): 933-49, 2014 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-24557779

RESUMEN

As developmental scientists cease to perceive adolescence as a period of inevitable turmoil and adopt the Positive Youth Development (PYD) perspective, psychometrically sound measurement tools will be needed to assess adolescents' positive attributes. In this article we examine the longitudinal stability of the very short version of the PYD scale developed as part of the 4-H Study of PYD. Using a sample of 7,071 adolescents (60% female) followed between Grades 5 and 12, our results suggest general stability of PYD across adolescence, both in terms of mean levels and rank-order stability. We also show that both a global measure of PYD and the individual Five Cs of PYD consistently correlate with important criterion measures (i.e., contribution, depressive symptoms, and problem behaviors) in expected ways. Although our results suggest weak relationships among our three criteria, we especially note that across adolescence PYD becomes more strongly correlated with contribution but less strongly correlated with depressive symptoms, and that confidence becomes more strongly related to depressive symptoms. We discuss implications for use of the present PYD measure in youth development programs.


Asunto(s)
Conducta del Adolescente , Desarrollo del Adolescente , Pruebas Psicológicas , Psicología del Adolescente/métodos , Encuestas y Cuestionarios , Adolescente , Niño , Análisis Factorial , Femenino , Encuestas Epidemiológicas , Humanos , Estudios Longitudinales , Masculino , Modelos Psicológicos , Modelos Estadísticos , Psicometría , Reproducibilidad de los Resultados , Estados Unidos
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