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1.
Am J Obstet Gynecol ; 228(2): 161-177, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-36027953

RESUMO

OBJECTIVE: This sequential, prospective meta-analysis sought to identify risk factors among pregnant and postpartum women with COVID-19 for adverse outcomes related to disease severity, maternal morbidities, neonatal mortality and morbidity, and adverse birth outcomes. DATA SOURCES: We prospectively invited study investigators to join the sequential, prospective meta-analysis via professional research networks beginning in March 2020. STUDY ELIGIBILITY CRITERIA: Eligible studies included those recruiting at least 25 consecutive cases of COVID-19 in pregnancy within a defined catchment area. METHODS: We included individual patient data from 21 participating studies. Data quality was assessed, and harmonized variables for risk factors and outcomes were constructed. Duplicate cases were removed. Pooled estimates for the absolute and relative risk of adverse outcomes comparing those with and without each risk factor were generated using a 2-stage meta-analysis. RESULTS: We collected data from 33 countries and territories, including 21,977 cases of SARS-CoV-2 infection in pregnancy or postpartum. We found that women with comorbidities (preexisting diabetes mellitus, hypertension, cardiovascular disease) vs those without were at higher risk for COVID-19 severity and adverse pregnancy outcomes (fetal death, preterm birth, low birthweight). Participants with COVID-19 and HIV were 1.74 times (95% confidence interval, 1.12-2.71) more likely to be admitted to the intensive care unit. Pregnant women who were underweight before pregnancy were at higher risk of intensive care unit admission (relative risk, 5.53; 95% confidence interval, 2.27-13.44), ventilation (relative risk, 9.36; 95% confidence interval, 3.87-22.63), and pregnancy-related death (relative risk, 14.10; 95% confidence interval, 2.83-70.36). Prepregnancy obesity was also a risk factor for severe COVID-19 outcomes including intensive care unit admission (relative risk, 1.81; 95% confidence interval, 1.26-2.60), ventilation (relative risk, 2.05; 95% confidence interval, 1.20-3.51), any critical care (relative risk, 1.89; 95% confidence interval, 1.28-2.77), and pneumonia (relative risk, 1.66; 95% confidence interval, 1.18-2.33). Anemic pregnant women with COVID-19 also had increased risk of intensive care unit admission (relative risk, 1.63; 95% confidence interval, 1.25-2.11) and death (relative risk, 2.36; 95% confidence interval, 1.15-4.81). CONCLUSION: We found that pregnant women with comorbidities including diabetes mellitus, hypertension, and cardiovascular disease were at increased risk for severe COVID-19-related outcomes, maternal morbidities, and adverse birth outcomes. We also identified several less commonly known risk factors, including HIV infection, prepregnancy underweight, and anemia. Although pregnant women are already considered a high-risk population, special priority for prevention and treatment should be given to pregnant women with these additional risk factors.


Assuntos
COVID-19 , Doenças Cardiovasculares , Infecções por HIV , Hipertensão , Complicações na Gravidez , Nascimento Prematuro , Gravidez , Recém-Nascido , Feminino , Humanos , COVID-19/epidemiologia , Nascimento Prematuro/epidemiologia , Estudos Prospectivos , Magreza , SARS-CoV-2 , Resultado da Gravidez/epidemiologia , Fatores de Risco , Complicações na Gravidez/epidemiologia , Período Pós-Parto
2.
Pediatr Res ; 93(5): 1141-1148, 2023 04.
Artigo em Inglês | MEDLINE | ID: mdl-34743180

RESUMO

INTRODUCTION: Neonatal sepsis is a leading cause of infant mortality worldwide with non-specific and varied presentation. We aimed to catalogue the current definitions of neonatal sepsis in published randomised controlled trials (RCTs). METHOD: A systematic search of the Embase and Cochrane databases was performed for RCTs which explicitly stated a definition for neonatal sepsis. Definitions were sub-divided into five primary criteria for infection (culture, laboratory findings, clinical signs, radiological evidence and risk factors) and stratified by qualifiers (early/late-onset and likelihood of sepsis). RESULTS: Of 668 papers screened, 80 RCTs were included and 128 individual definitions identified. The single most common definition was neonatal sepsis defined by blood culture alone (n = 35), followed by culture and clinical signs (n = 29), and then laboratory tests/clinical signs (n = 25). Blood culture featured in 83 definitions, laboratory testing featured in 48 definitions while clinical signs and radiology featured in 80 and 8 definitions, respectively. DISCUSSION: A diverse range of definitions of neonatal sepsis are used and based on microbiological culture, laboratory tests and clinical signs in contrast to adult and paediatric sepsis which use organ dysfunction. An international consensus-based definition of neonatal sepsis could allow meta-analysis and translate results to improve outcomes.


Assuntos
Sepse Neonatal , Adulto , Criança , Humanos , Lactente , Recém-Nascido , Mortalidade Infantil , Sepse Neonatal/diagnóstico , Ensaios Clínicos Controlados Aleatórios como Assunto , Sepse/diagnóstico , Sepse/terapia
3.
Subst Use Misuse ; 58(9): 1152-1158, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37204213

RESUMO

Background: Methamphetamine use disorder (MUD) has become more and more common. Some studies have shown that Transcranial Direct Current stimulation (tDCS) may reduce craving when stimulating the dorsal lateral prefrontal cortex. Objectives: The aim of this systematic review was to evaluate the effect of transcranial direct current stimulation (tDCS) on MUD. Databases were searched through May 2022. Randomized Controlled Trials (RCT) and pre-post studies investigating the efficacy of tDCS in MUD were included. The Cochrane Manual of Systematic Evaluation 6.3 bias risk assessment tool was used to assess the risk of bias. For each article, where possible, we extracted the population(s), standardized mean differences (SMD), standard deviations, and other study metrics (design, year, randomization, and details) on efficacy and tolerability outcomes. We assessed each article's quality via the GRADE assessment protocol. Results: Six studies involving 220 patients were included. All six studies included reported continuous data on craving. Results from craving favored active tDCS over sham tDCS at the end of treatment (SMD -0.58, 95% CI -0.85 to -0.30; studies = 6, participants = 220; I2 = 60%). Tolerability data showed that tDCS does not cause more tingling or itching sensation compared to sham tDCS. Conclusions: Further trials with larger sample sizes and longer durations are needed to determine whether tDCS is a valuable tool in treating MUD.


Assuntos
Estimulação Transcraniana por Corrente Contínua , Humanos , Estimulação Transcraniana por Corrente Contínua/métodos , Fissura , Projetos de Pesquisa
4.
Pediatr Res ; 91(2): 432-439, 2022 01.
Artigo em Inglês | MEDLINE | ID: mdl-34961785

RESUMO

The SARS-CoV-2 pandemic has had a significant impact worldwide, particularly in middle- and low-income countries. While this impact has been well-recognized in certain age groups, the effects, both direct and indirect, on the neonatal population remain largely unknown. There are placental changes associated, though the contributions to maternal and fetal illness have not been fully determined. The rate of premature delivery has increased and SARS-CoV-2 infection is proportionately higher in premature neonates, which appears to be related to premature delivery for maternal reasons rather than an increase in spontaneous preterm labor. There is much room for expansion, including long-term data on outcomes for affected babies. Though uncommon, there has been evidence of adverse events in neonates, including Multisystem Inflammatory Syndrome in Children, associated with COVID-19 (MIS-C). There are recommendations for reduction of viral transmission to neonates, though more research is required to determine the role of passive immunization of the fetus via maternal vaccination. There is now considerable evidence suggesting that the severe visitation restrictions implemented early in the pandemic have negatively impacted the care of the neonate and the experiences of both parents and healthcare professionals alike. Ongoing collaboration is required to determine the full impact, and guidelines for future management. IMPACT: Comprehensive review of current available evidence related to impact of the COVID-19 pandemic on neonates, effects on their health, impact on their quality of care and indirect influences on their clinical course, including comparisons with other age groups. Reference to current evidence for maternal experience of infection and how it impacts the fetus and then neonate. Outline of the need for ongoing research, including specific areas in which there are significant gaps in knowledge.


Assuntos
COVID-19/complicações , Doenças do Recém-Nascido , COVID-19/prevenção & controle , COVID-19/virologia , Feminino , Humanos , Recém-Nascido , Transmissão Vertical de Doenças Infecciosas , Troca Materno-Fetal , Placenta/virologia , Gravidez , Nascimento Prematuro , SARS-CoV-2/isolamento & purificação , Síndrome de Resposta Inflamatória Sistêmica/complicações
5.
Pediatr Res ; 91(4): 735-742, 2022 03.
Artigo em Inglês | MEDLINE | ID: mdl-34997225

RESUMO

BACKGROUND: The lack of a consensus definition of neonatal sepsis and a core outcome set (COS) proves a substantial impediment to research that influences policy and practice relevant to key stakeholders, patients and parents. METHODS: A systematic review of the literature was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. In the included studies, the described outcomes were extracted in accordance with the provisions of the Core Outcome Measures in Effectiveness Trials (COMET) handbook and registered. RESULTS: Among 884 abstracts identified, 90 randomised controlled trials (RCTs) were included in this review. Only 30 manuscripts explicitly stated the primary and/or secondary outcomes. A total of 88 distinct outcomes were recorded across all 90 studies included. These were then assigned to seven different domains in line with the taxonomy for classification proposed by the COMET initiative. The most frequently reported outcome was survival with 74% (n = 67) of the studies reporting an outcome within this domain. CONCLUSIONS: This systematic review constitutes one of the initial phases in the protocol for developing a COS in neonatal sepsis. The paucity of standardised outcome reporting in neonatal sepsis hinders comparison and synthesis of data. The final phase will involve a Delphi Survey to generate a COS in neonatal sepsis by consensus recommendation. IMPACT: This systematic review identified a wide variation of outcomes reported among published RCTs on the management of neonatal sepsis. The paucity of standardised outcome reporting hinders comparison and synthesis of data and future meta-analyses with conclusive recommendations on the management of neonatal sepsis are unlikely. The final phase will involve a Delphi Survey to determine a COS by consensus recommendation with input from all relevant stakeholders.


Assuntos
Sepse Neonatal , Projetos de Pesquisa , Técnica Delphi , Humanos , Recém-Nascido , Sepse Neonatal/diagnóstico , Sepse Neonatal/terapia , Avaliação de Resultados em Cuidados de Saúde , Ensaios Clínicos Controlados Aleatórios como Assunto , Resultado do Tratamento
6.
Acta Obstet Gynecol Scand ; 101(4): 461-470, 2022 04.
Artigo em Inglês | MEDLINE | ID: mdl-35213734

RESUMO

INTRODUCTION: There is a lack of population level data on risk factors and impact of severe COVID-19 in pregnancy. The aims of this study were to determine the characteristics, and maternal and perinatal outcomes associated with severe COVID-19 in pregnancy compared with those with mild and moderate COVID-19 and to explore the impact of timing of birth. MATERIAL AND METHODS: This was a secondary analysis of a national, prospective cohort study. All pregnant women admitted to hospital in the UK with symptomatic SARS-CoV-2 from March 1, 2020 to October 31, 2021 were included. The severity of maternal infection (need for high flow or invasive ventilation, intensive care admission or died), pregnancy and perinatal outcomes, and the impact of timing of birth were analyzed using multivariable logistic regression. RESULTS: Of 4436 pregnant women, 13.9% (n = 616) had severe infection. Women with severe infection were more likely to be aged ≥30 years (adjusted odds ratio [aOR] aged 30-39 1.48, 95% confidence interval [CI] 1.20-1.83), be overweight or obese (aOR 1.73, 95% CI 1.34-2.25 and aOR 2.52 95% CI 1.97-3.23, respectively), be of mixed ethnicity (aOR 1.93, 95% CI 1.17-3.21) or have gestational diabetes (aOR 1.43, 95% CI 1.09-1.87) compared with those with mild or moderate infection. Women with severe infection were more likely to have a pre-labor cesarean birth (aOR 8.84, 95% CI 6.61-11.83), a very or extreme preterm birth (28-31+ weeks' gestation, aOR 18.97, 95% CI 7.78-14.85; <28 weeks' gestation, aOR 12.35, 95% CI 6.34-24.05) and their babies were more likely to be stillborn (aOR 2.51, 95% CI 1.35-4.66) or admitted to a neonatal unit (aOR 11.61, 95% CI 9.28-14.52). Of 112 women with severe infection who were discharged and gave birth at a later admission, the majority gave birth ≥36 weeks (85.7%), noting that three women in this group (2.7%) had a stillbirth. CONCLUSIONS: Severe COVID-19 in pregnancy increases the risk of adverse outcomes. Information to promote uptake of vaccination should specifically target those at greatest risk of severe outcomes. Decisions about timing of birth should be informed by multidisciplinary team discussion; however, our data suggest that women with severe infection who do not require early delivery have mostly good outcomes but that those with severe infection at term may warrant rapid delivery.


Assuntos
COVID-19 , Nascimento Prematuro , Adulto , COVID-19/epidemiologia , Estudos de Coortes , Feminino , Humanos , Recém-Nascido , Gravidez , Resultado da Gravidez/epidemiologia , Nascimento Prematuro/epidemiologia , Estudos Prospectivos , SARS-CoV-2 , Natimorto/epidemiologia , Reino Unido/epidemiologia
7.
Heart Vessels ; 37(8): 1291-1298, 2022 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-35089380

RESUMO

Chronic kidney disease (CKD) increases the risk of adverse outcomes in acute coronary syndrome (ACS). The optimal regimen of dual antiplatelet therapy (DAPT) post-percutaneous coronary intervention (PCI) in CKD poses a challenge due to the increased bleeding and clotting tendencies, particularly since patients with CKD were underrepresented in randomized controlled trials. We examined the practice patterns of DAPT prescription stratified by the presence of CKD. The multicentre prospective Canadian Observational Antiplatelet Study (COAPT) enrolled patients with ACS between December 2011 and May 2013. The present study is a subgroup analysis comparing type and duration of DAPT and associated outcomes among patients with and without CKD (eGFR < 60 ml/min/1.73 m2, calculated by CKD-EPI). Patients with CKD (275/1921, 14.3%) were prescribed prasugrel/ticagrelor less (18.5% vs 25.8%, p = 0.01) and had a shorter duration of DAPT therapy versus patients without CKD (median 382 vs 402 days, p = 0.003). CKD was associated with major adverse cardiovascular events (MACE) at 12 months (p < 0.001) but not bleeding when compared to patients without CKD. CKD was associated with MACE in both patients on prasugrel/ticagrelor (p = 0.017) and those on clopidogrel (p < 0.001) (p for heterogeneity = 0.70). CKD was associated with increased bleeding only among patients receiving prasugrel/ticagrelor (p = 0.007), but not among those receiving clopidogrel (p = 0.64) (p for heterogeneity = 0.036). Patients with CKD had a shorter DAPT duration and were less frequently prescribed potent P2Y12 inhibitors than patients without CKD. Overall, compared with patients without CKD, patients with CKD had higher rates of MACE and similar bleeding rates. However, among those prescribed more potent P2Y12 inhibitors, CKD was associated with more bleeding than those without CKD. Further studies are needed to better define the benefit/risk evaluation, and establish a more tailored and evidence-based DAPT regimen for this high-risk patient group.


Assuntos
Síndrome Coronariana Aguda , Intervenção Coronária Percutânea , Insuficiência Renal Crônica , Síndrome Coronariana Aguda/complicações , Síndrome Coronariana Aguda/tratamento farmacológico , Canadá/epidemiologia , Clopidogrel/efeitos adversos , Hemorragia/induzido quimicamente , Hemorragia/epidemiologia , Humanos , Intervenção Coronária Percutânea/efeitos adversos , Inibidores da Agregação Plaquetária/efeitos adversos , Cloridrato de Prasugrel/efeitos adversos , Estudos Prospectivos , Insuficiência Renal Crônica/complicações , Insuficiência Renal Crônica/diagnóstico , Insuficiência Renal Crônica/epidemiologia , Ticagrelor , Resultado do Tratamento
8.
Acta Paediatr ; 109(11): 2192-2207, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-32716579

RESUMO

AIM: This review examined how applicable national and regional clinical practice guidelines and recommendations for managing neonates born to mothers with COVID-19 mothers were to the evolving pandemic. METHODS: A systematic search and review identified 20 guidelines and recommendations that had been published by May 25, 2020. We analysed documents from 17 countries: Australia, Brazil, Canada, China, France, India, Italy, Japan, Saudi Arabia, Singapore, South Africa, South Korea, Spain, Sweden, Switzerland, the UK and the United States. RESULTS: The documents were based on expert consensus with limited evidence and were of variable, low methodological rigour. Most did not provide recommendations for delivery methods or managing symptomatic infants. None provided recommendations for post-discharge assimilation of potentially infected infants into the community. The majority encouraged keeping mothers and infants together, subject to infection control measures, but one-third recommended separation. Although breastfeeding or using breastmilk was widely encouraged, two countries specifically prohibited this. CONCLUSION: The guidelines and recommendations for managing infants affected by COVID-19 were of low, variable quality and may be unsustainable. It is important that transmission risks are not increased when new information is incorporated into clinical recommendations. Practice guidelines should emphasise the extent of uncertainty and clearly define gaps in the evidence.


Assuntos
COVID-19 , Assistência Perinatal/normas , Complicações Infecciosas na Gravidez , Feminino , Humanos , Recém-Nascido , Guias de Prática Clínica como Assunto , Gravidez
9.
JAMA ; 316(10): 1073-82, 2016 Sep 13.
Artigo em Inglês | MEDLINE | ID: mdl-27574717

RESUMO

IMPORTANCE: International studies report a decline in mortality following non-ST-elevation myocardial infarction (NSTEMI). Whether this is due to lower baseline risk or increased utilization of guideline-indicated treatments is unknown. OBJECTIVE: To determine whether changes in characteristics of patients with NSTEMI are associated with improvements in outcomes. DESIGN, SETTING, AND PARTICIPANTS: Data on patients with NSTEMI in 247 hospitals in England and Wales were obtained from the Myocardial Ischaemia National Audit Project between January 1, 2003, and June 30, 2013 (final follow-up, December 31, 2013). EXPOSURES: Baseline demographics, clinical risk (GRACE risk score), and pharmacological and invasive coronary treatments. MAIN OUTCOMES AND MEASURES: Adjusted all-cause 180-day postdischarge mortality time trends estimated using flexible parametric survival modeling. RESULTS: Among 389 057 patients with NSTEMI (median age, 72.7 years [IQR, 61.7-81.2 years]; 63.1% men), there were 113 586 deaths (29.2%). From 2003-2004 to 2012-2013, proportions with intermediate to high GRACE risk decreased (87.2% vs 82.0%); proportions with lowest risk increased (4.2% vs 7.6%; P= .01 for trend). The prevalence of diabetes, hypertension, cerebrovascular disease, chronic obstructive pulmonary disease, chronic renal failure, previous invasive coronary strategy, and current or ex-smoking status increased (all P < .001). Unadjusted all-cause mortality rates at 180 days decreased from 10.8% to 7.6% (unadjusted hazard ratio [HR], 0.968 [95% CI, 0.966-0.971]; difference in absolute mortality rate per 100 patients [AMR/100], -1.81 [95% CI, -1.95 to -1.67]). These findings were not substantially changed when adjusted additively by baseline GRACE risk score (HR, 0.975 [95% CI, 0.972-0.977]; AMR/100, -0.18 [95% CI, -0.21 to -0.16]), sex and socioeconomic status (HR, 0.975 [95% CI, 0.973-0.978]; difference in AMR/100, -0.24 [95% CI, -0.27 to -0.21]), comorbidities (HR, 0.973 [95% CI, 0.970-0.976]; difference in AMR/100, -0.44 [95% CI, -0.49 to -0.39]), and pharmacological therapies (HR, 0.972 [95% CI, 0.964-0.980]; difference in AMR/100, -0.53 [95% CI, -0.70 to -0.36]). However, the direction of association was reversed after further adjustment for use of an invasive coronary strategy (HR, 1.02 [95% CI, 1.01-1.03]; difference in AMR/100, 0.59 [95% CI, 0.33-0.86]), which was associated with a relative decrease in mortality of 46.1% (95% CI, 38.9%-52.0%). CONCLUSIONS AND RELEVANCE: Among patients hospitalized with NSTEMI in England and Wales, improvements in all-cause mortality were observed between 2003 and 2013. This was significantly associated with use of an invasive coronary strategy and not entirely related to a decline in baseline clinical risk or increased use of pharmacological therapies.


Assuntos
Infarto do Miocárdio/mortalidade , Infarto do Miocárdio/terapia , Idoso , Idoso de 80 Anos ou mais , Transtornos Cerebrovasculares/epidemiologia , Transtornos Cerebrovasculares/terapia , Estudos de Coortes , Diabetes Mellitus/epidemiologia , Tratamento Farmacológico , Inglaterra , Feminino , Humanos , Hipertensão/epidemiologia , Masculino , Pessoa de Meia-Idade , Prevalência , Prognóstico , Doença Pulmonar Obstrutiva Crônica/epidemiologia , Estudos Retrospectivos , Fatores de Risco , País de Gales
10.
Issues Ment Health Nurs ; 37(7): 507-16, 2016 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-27127851

RESUMO

Patient or client aggression towards staff is a risk in healthcare. Healthcare takes place in a variety of settings, including hospitals, community, and Aged Care facilities. A minimal amount is known regarding the existence of safety and training measures available throughout the broad range of hospital and community healthcare services. A web-based survey of the type and frequency of violence experienced by healthcare staff was sent to unit managers working in mental health and older peoples' services of District Health Boards, Non-Governmental Organisations, and Aged Care facilities across New Zealand. One hundred and forty-one managers responded to the survey with a response rate of 79.21%. Managers reported high rates of verbal aggression and assaults against staff within their services. A total of 60% of respondents stated that an increase in assaults against staff was due to an increase in violent events and 43.1% related this to increased staff awareness and reporting of violent events to management. Communication skills and de-escalation training were provided across approximately 95% of organisations. The availability of safety measures including panic buttons, personal alarms, use of security personnel, and police assistance were more widely available and accessible within hospital settings and the community sector was found to mostly rely on police for assistance when violence occurs. The perception of violence is high in healthcare. Prevention and management training is provided in public hospital and aged care setting but not so much in NGOs. All areas of healthcare provision could benefit from increased evidence based aggression prevention programmes.


Assuntos
Agressão , Atitude do Pessoal de Saúde , Violência no Trabalho/prevenção & controle , Estudos Transversais , Humanos , Nova Zelândia , Recursos Humanos de Enfermagem Hospitalar , Saúde Ocupacional
11.
Age Ageing ; 43(4): 450-5, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-24742588

RESUMO

Advancing age is a risk factor for the development of coronary artery disease and is an important indicator of outcome after acute coronary syndrome. As the number of older adults increases, the burden of cardiovascular disease is set to grow particularly as older adults remain disadvantaged in the delivery of acute cardiac care. This article reviews the temporal changes in the provision of guideline recommended therapies for the management of acute coronary syndrome, discusses reasons for age-dependent inequalities in care and the challenges facing clinicians.


Assuntos
Síndrome Coronariana Aguda/terapia , Síndrome Coronariana Aguda/epidemiologia , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Gerenciamento Clínico , Serviços de Saúde para Idosos , Humanos , Guias de Prática Clínica como Assunto , Fatores de Risco
12.
J Phys Chem B ; 128(5): 1317-1324, 2024 Feb 08.
Artigo em Inglês | MEDLINE | ID: mdl-38288994

RESUMO

The core-shell assembly motif is ubiquitous in chemistry. While the most obvious examples are core/shell-type nanoparticles, many other examples exist. The shape of the core/shell constructs is poorly understood, making it impossible to separate chemical effects from geometric effects. Here, we create a model for the core/shell construct and develop proof for how the eccentricity is expected to change as a function of the shell. We find that the addition of a constant thickness shell always creates a relatively more spherical shape for all shapes covered by our model unless the shape is already spherical or has some underlying radial symmetry. We apply this work to simulated AOT reverse micelles and demonstrate that it is remarkably successful at explaining the observed shapes of the chemical systems. We identify the three specific cases where the model breaks down and how this impacts eccentricity.

13.
J Phys Chem B ; 128(26): 6410-6421, 2024 Jul 04.
Artigo em Inglês | MEDLINE | ID: mdl-38900154

RESUMO

AOT reverse micelles are a common and convenient model system for studying the effects of nanoconfinement on aqueous solutions. The reverse micelle shape is important to understanding how the constituent components come together to form the coherent whole and the unique properties observed there. The shape of reverse micelles impacts the amount of interface present and the distance of the solute from the interface and is therefore vital to understanding interfacial properties and the behavior of solutes in the polar core. In this work, we use previously introduced measures of shape, the coordinate-pair eccentricity (CPE) and convexity, and apply them to a series of simulations of AOT reverse micelles. We simulate the most commonly used force field for AOT reverse micelles, the CHARMM force field, but we also adapt the OPLS force field for use with AOT, the first work to do so, in addition to using both 3- and 4-site water models. Altogether, these simulations are designed to examine the impact of the force field on the shape of the reverse micelles in detail. We also study the time autocorrelation of shape, the water rotational anisotropy decay, and how the CPE changes between the water pool and AOT tail groups. We find that although the force field changes the shape noticeably, AOT reverse micelles are always amorphous particles. The shape of the micelles changes on the order of 10 ns. The water rotational dynamics observed match the experiment and demonstrate slower dynamics relative to bulk water, suggesting a two-population model that fits a core/shell hypothesis. Taken together, our results indicate that it is likely not possible to create a perfect force field that can reproduce every aspect of the AOT reverse micelle accurately. However, the magnitude of the differences between simulations appears relatively small, suggesting that any reasonably derived force field should provide an acceptable model for most work on AOT reverse micelles.

14.
Australas Psychiatry ; 20(4): 313-7, 2012 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-22767940

RESUMO

OBJECTIVE: Suicidality among patients with schizophrenia remains a major concern. The consumer-oriented concept of recovery has been recognised as important in recent years. We aimed to assess whether there was any relationship between stages of recovery and suicidality among people with schizophrenia in community care. METHOD: In a community mental health service, 85 patients with schizophrenia consented to an interview during which their stages of recovery were assessed using the Stages of Recovery Instrument. They were asked about suicidality and screened for depression using the Revised Clinical Interview Schedule. Insight was assessed via the Insight and Treatment Attitudes Questionnaire. Data analysis involved logistic regression. RESULTS: In the past year 14% of the patients reported having wanted to die and 13% had considered suicide. Scores indicating the highest stage of recovery were associated with lower odds of suicidal thoughts. In contrast, suicidality was not significantly associated with depression or stage of insight. CONCLUSION: The link found between suicidality and stages of recovery has practical implications for suicide prevention among those with schizophrenia in community care. Approaches that facilitate the recovery process may reduce suicidal thoughts in this population.


Assuntos
Depressão , Esquizofrenia/reabilitação , Ideação Suicida , Adulto , Idoso , Centros Comunitários de Saúde Mental , Feminino , Humanos , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Transtornos Psicóticos/reabilitação , Inquéritos e Questionários
15.
J Phys Chem B ; 126(4): 953-963, 2022 02 03.
Artigo em Inglês | MEDLINE | ID: mdl-35080415

RESUMO

Aerosol-OT reverse micelles represent a chemical construct where surfactant molecules self-assemble to stabilize water nanodroplets 1-10 nm in diameter. Although commonly assumed to adopt a spherical shape, all-atom molecular dynamics simulations and some experimental studies predict a nonspherical shape. If these aggregates are not spherical, then what shape do they take? Because the tools needed to evaluate the shape of something that lacks regular structure, order, or symmetry are not well developed, we present a set of three intuitive metrics─coordinate-pair eccentricity, convexity, and the curvature distribution─that estimate the shape of an amorphous object, and we demonstrate their use on a simulated aerosol-OT reverse micelle. These metrics are all well-established methods and principles in mathematics, and each provides unique information about the shape. Together, these metrics provide intuitive descriptions of amorphous shapes, facilitate ways to quantify those shapes, and follow their changes over time.


Assuntos
Ácido Dioctil Sulfossuccínico , Micelas , Ácido Dioctil Sulfossuccínico/química , Simulação de Dinâmica Molecular , Tensoativos/química , Água/química
16.
Explor Res Clin Soc Pharm ; 5: 100100, 2022 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-35478502

RESUMO

Background: High levels of aggression towards staff in healthcare settings have been reported. It seems likely that workers in Opioid Substitution Therapy (OST) would be at increased risk of adverse events and their consequences. Objectives: This study aimed to establish if practitioners who provide OST are experiencing negative outcomes, specifically aggression, distress, and burnout, and to identify if workload and professional affiliation were associated with these risks. Methods: A survey was conducted of OST practitioners in a single geographical region of New Zealand (population approx. 344,000). The survey asked for demographics (including caseloads), Perception of Patient Aggression Scale New Zealand Revision (POPAS-NZ), Kessler 10 (K10), Short Post-Traumatic Stress Disorder Rating Interview (SPRINT), and Abbreviated Maslach Burnout Inventory (aMBI) and two qualitative questions asking about the best and worst aspects of working in OST. Results: All recorded OST workers in the region (n = 181) were invited to participate, 95 practitioners responded to the survey (52.4%). This group included pharmacists, doctors, nurses, social workers and addiction workers. Results indicated aggression, distress, and burnout were being experienced by practitioners. Number of patients seen by a practitioner significantly increased risk of aggression (F(1,90) = 14.14, p < 0.001). Psychiatrists were the most at risk profession (p = 0.016). Burnout responses were high for around 20% of practitioners, with low numbers meeting criteria for distress and PTSD. Positive things about working in OST were relationships with patients, appreciating patient outcomes and positive team environments. Negative aspects were patient behaviours, maintaining empathy, and, administration tasks. Conclusions: Aggression was a workplace hazard for OST clinicians. Low rates of distress and PTSD symptoms were reported and some evidence of practitioner burnout. Practitioners reported positive relationships, making a difference and teamwork may have been improving this area of mental health work.

17.
J Epidemiol Community Health ; 76(3): 239-246, 2022 03.
Artigo em Inglês | MEDLINE | ID: mdl-34503988

RESUMO

BACKGROUND: A maternal postpartum 6-week check (SWC) with a general practitioner (GP) is now considered an essential service in England, a recent policy change intended to improve women's health. We aimed to provide an up-to-date snapshot of the prevalence of SWC prior to the policy change as a baseline, and to explore factors associated with having a late or no check. METHODS: We conducted a cohort study using primary care records in England (Clinical Practice Research Datalink (CPRD)). 34 337 women who gave birth between 1 July 2015 and 30 June 2018 and had ≥12 weeks of follow-up post partum were identified in the CPRD Pregnancy Register. The proportion who had evidence of an SWC with a GP was calculated, and regression analysis was used to assess the association between women's characteristics and risks of a late or no check. RESULTS: Sixty-two per cent (95% CI 58% to 67%) of women had an SWC recorded at their GP practice within 12 weeks post partum, another 27% had other consultations. Forty per cent had an SWC at the recommended 6-8 weeks, 2% earlier and 20% later. A late or no check was more common among younger women, mothers of preterm babies or those registered in more deprived areas. CONCLUSIONS: Nearly 40% of women did not have a postpartum SWC recorded. Provision or uptake was not equitable; younger women and those in more deprived areas were less likely to have a record of such check, suggesting postpartum care in general practice may be missing some women who need it most.


Assuntos
Mães , Período Pós-Parto , Estudos de Coortes , Inglaterra/epidemiologia , Feminino , Humanos , Recém-Nascido , Gravidez , Atenção Primária à Saúde
18.
BMJ Med ; 1(1): e000053, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36936566

RESUMO

Objective: To compare the severity of maternal infection and perinatal outcomes during periods in which wildtype, alpha variant, and delta variant of SARS-CoV-2 were dominant in the UK. Design: Prospective cohort study. Setting: 194 obstetric units across the UK, during the following periods: between 1 March and 30 November 2020 (wildtype dominance), between 1 December 2020 and 15 May 2021 (alpha variant dominance), and between 16 May and 31 October 2021 (delta variant dominance). Participants: 4436 pregnant women admitted to hospital with covid-19 related symptoms. Main outcome measures: Moderate to severe maternal SARS-CoV-2 infection (indicated by any of the following: oxygen saturation <95% on admission, need for oxygen treatment, evidence of pneumonia on imaging, admission to intensive care, or maternal death), and pregnancy and perinatal outcomes (including mode and gestation of birth, stillbirth, live birth, admission to neonatal intensive care, and neonatal death). Results: 1387, 1613, and 1436 pregnant women were admitted to hospital with covid-19 related symptoms during the wildtype, alpha, and delta dominance periods, respectively; of these women, 340, 585, and 614 had moderate to severe infection, respectively. The proportion of pregnant women admitted with moderate to severe infection increased during the subsequent alpha and delta dominance periods, compared with the wildtype dominance period (wildtype 24.5% v alpha 36.2% (adjusted odds ratio 1.98, 95% confidence interval 1.66% to 2.37%); wildtype 24.5% v delta 42.8% (2.66, 2.21 to 3.20)). Compared with the wildtype dominance period, women admitted during the alpha dominance period were significantly more likely to have pneumonia, require respiratory support, and be admitted to intensive care; these three risks were even greater during the delta dominance period (wildtype v delta: pneumonia, adjusted odds ratio 2.52, 95% confidence interval 2.06 to 3.09; respiratory support, 1.90, 1.52 to 2.37; and intensive care, 2.71, 2.06 to 3.56). Of 1761 women whose vaccination status was known, 38 (2.2%) had one dose and 16 (1%) had two doses before their diagnosis (of whom 14 (88%) had mild infection). The proportion of women receiving drug treatment for SARS-CoV-2 management was low, but did increase between the wildtype dominance period and the alpha and delta dominance periods (10.4% wildtype v 14.9% alpha (2.74, 2.08 to 3.60); 10.4% wildtype v 13.6% delta (2.54, 1.90 to 3.38)). Conclusions: While limited by the absence of variant sequencing data, these findings suggest that during the periods when the alpha and delta variants of SARS-CoV-2 were dominant, covid-19 was associated with more severe maternal infection and worse pregnancy outcomes than during the wildtype dominance period. Most women admitted with SARS-CoV-2 related symptoms were unvaccinated. Urgent action to prioritise vaccine uptake in pregnancy is essential. Study registration: ISRCTN40092247.

19.
PLoS One ; 17(6): e0270150, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35709239

RESUMO

We urgently need answers to basic epidemiological questions regarding SARS-CoV-2 infection in pregnant and postpartum women and its effect on their newborns. While many national registries, health facilities, and research groups are collecting relevant data, we need a collaborative and methodologically rigorous approach to better combine these data and address knowledge gaps, especially those related to rare outcomes. We propose that using a sequential, prospective meta-analysis (PMA) is the best approach to generate data for policy- and practice-oriented guidelines. As the pandemic evolves, additional studies identified retrospectively by the steering committee or through living systematic reviews will be invited to participate in this PMA. Investigators can contribute to the PMA by either submitting individual patient data or running standardized code to generate aggregate data estimates. For the primary analysis, we will pool data using two-stage meta-analysis methods. The meta-analyses will be updated as additional data accrue in each contributing study and as additional studies meet study-specific time or data accrual thresholds for sharing. At the time of publication, investigators of 25 studies, including more than 76,000 pregnancies, in 41 countries had agreed to share data for this analysis. Among the included studies, 12 have a contemporaneous comparison group of pregnancies without COVID-19, and four studies include a comparison group of non-pregnant women of reproductive age with COVID-19. Protocols and updates will be maintained publicly. Results will be shared with key stakeholders, including the World Health Organization (WHO) Maternal, Newborn, Child, and Adolescent Health (MNCAH) Research Working Group. Data contributors will share results with local stakeholders. Scientific publications will be published in open-access journals on an ongoing basis.


Assuntos
COVID-19 , Adolescente , COVID-19/epidemiologia , Criança , Feminino , Humanos , Recém-Nascido , Metanálise como Assunto , Período Pós-Parto , Gravidez , Estudos Prospectivos , Estudos Retrospectivos , SARS-CoV-2
20.
Pediatr Res ; 70(3): 287-91, 2011 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-21629154

RESUMO

Maternal overweight and obesity are associated with adverse offspring outcome in later life. The causal biological effectors are uncertain. Postulating that initiating events may be alterations to infant body composition established in utero, we tested the hypothesis that neonatal adipose tissue (AT) content and distribution and liver lipid are influenced by maternal BMI. We studied 105 healthy mother-neonate pairs. We assessed infant AT compartments by whole body MR imaging and intrahepatocellular lipid content by H MR spectroscopy. Maternal BMI ranged from 16.7 to 36.0. With each unit increase in maternal BMI, having adjusted for infant sex and weight, there was an increase in infant total (8 mL; 95% CI, 0.09-14.0; p = 0.03), abdominal (2 mL; 95% CI, 0.7-4.0; p = 0.005), and nonabdominal (5 mL; 95% CI, 0.09-11.0; p = 0.054) AT, and having adjusted for infant sex and postnatal age, an increase of 8.6% (95% CI, 1.1-16.8; p = 0.03) in intrahepatocellular lipid. Infant abdominal AT and liver lipid increase with increasing maternal BMI across the normal range. These effects may be the initiating determinants of a life-long trajectory leading to adverse metabolic health.


Assuntos
Adiposidade , Índice de Massa Corporal , Recém-Nascido , Lipídeos/análise , Fígado/química , Mães , Efeitos Tardios da Exposição Pré-Natal , Gordura Abdominal , Antropometria , Composição Corporal , Peso Corporal , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Masculino , Obesidade/complicações , Sobrepeso/complicações , Gravidez , Reino Unido
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