Publications by authors named "McGARVEY S"

Sleep apnea is a global public health concern, but little research has examined this issue in low- and middle-income countries, including Samoa. The purpose of this study was to examine the sample prevalence and characteristics of sleep apnea using a validated home sleep apnea device (WatchPAT, Itamar) and explore factors that may influence sleep health in the Samoan setting. This study used data collected through the ("Good Health") study, which investigated the impact of the body mass index (BMI)-associated genetic variant rs373863828 in on metabolic traits in Samoan adults (sampled to overrepresent the obesity-risk allele of interest).

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Study Question: Can a genome-wide association study (GWAS) and transcriptome-wide association study (TWAS) help identify genetic variation or genes associated with circulating anti-Müllerian hormone (AMH) levels in Samoan women?

Summary Answer: We identified eleven genome-wide suggestive loci (strongest association signal in 19-946163-G-C [ = 2.32 × 10⁻⁷]) and seven transcriptome-wide significant genes ( [all with a < 2.50 × 10⁻⁶]) associated with circulating AMH levels in Samoan women.

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Background/objective: Pacific children are at high obesity risk, yet the behavioral and environmental factors that contribute to obesity development in this setting remain poorly understood. We assessed associations between childhood risk factors for obesity with body mass index (BMI) trajectories between ages 2-9 years in Samoa.

Subjects/methods: In a prospective cohort of 485 children from 'Upolu, we measured weight and height at ages 2-4 (2015), 3.

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This umbrella review of 34 meta-analyses, representing 235 randomised controlled trials done across 52 countries and 48 957 participants and ten chronic conditions, aimed to evaluate evidence on the efficacy of mobile phone interventions for populations with chronic diseases. We evaluated the strengths of evidence via the Fusar-Poli and Radua methodology. Compared with usual care, mobile apps had convincing effects on glycated haemoglobin reduction among adults with type 2 diabetes (d=0·44).

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Introduction: In Sub Saharan Africa, there is a growing burden of non-communicable diseases, which poses a big challenge to the resource-limited health system in these settings.

Objective: The aim of this study was to determine the feasibility and preliminary efficacy of a community health workers (CHWs) home-based lifestyle interventions to improve blood pressure (BP) control and body composition among hypertensive patients in low-income populations of Kiambu County, Kenya.

Methods: This was a randomized controlled trial (RCT) involving 80 patients with uncontrolled high BP (systolic BP (SBP) ≥140mmHg and/or diastolic BP (DBP) ≥90) randomized to either a CHW homebased intervention or a usual care (control) arm and followed up for 6 months.

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This paper investigates the demographic and socio-economic correlates of dietary patterns in South Africa, drawing on a sample of young adults experiencing internal migration and urbanisation. We use data from the 2018 baseline survey of the Migrant Health Follow-Up Study, an original longitudinal cohort study consisting of 3,087 internal migrants and rural residents aged 18-40 nested within the Agincourt Health and socio-Demographic Surveillance System in rural northeast South Africa. We employ principal components analysis to identify dietary patterns from food frequency questionnaires and ordinary least squares regression to assess whether migration and other socio-economic characteristics correlate with specific dietary patterns at baseline.

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Immunomodulation enhances parasite fitness by reducing inflammation-induced morbidity in the mammalian host, as well as by attenuating parasite-targeting immune responses. Using a whole-proteome differential screening method, we identified Schistosoma japonicum helminth defense molecule 1 (SjHDM-1) as a target of antibodies expressed by S. japonicum-resistant but not S.

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Introduction: Outside of pregnancy, evidence shows that persons with HIV initiating or switching to dolutegravir (DTG)-based antiretroviral therapy (ART) experience greater weight gain compared to those on other ART classes. However, there are few data on the impact of DTG-based ART on gestational weight gain (GWG) in sub-Saharan Africa where HIV is most common. According to the National Academy of Medicine (NAM), GWG below and above NAM guidelines is associated with adverse birth outcomes.

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Background: The A allele of rs373863828 in CREB3 regulatory factor is associated with high Body Mass Index, but lower odds of type 2 diabetes. These associations have been replicated elsewhere, but to date all studies have been cross-sectional. Our aims were (1) to describe the development of type 2 diabetes and change in fasting glucose between 2010 and 2018 among a longitudinal cohort of adult Samoans without type 2 diabetes or who were not using diabetes medications at baseline, and (2) to examine associations between fasting glucose rate-of-change (mmol/L per year) and the A allele of rs373863828.

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Article Synopsis
  • Genome-wide association studies (GWAS) have successfully identified genes linked to telomere length, but previous research hadn't validated these findings until now.
  • In a large analysis involving over 211,000 people, the study discovered five new signals linked to telomere length and highlighted the importance of blood/immune cells in this area.
  • The researchers confirmed that the genes KBTBD6 and POP5 truly affect telomere length by demonstrating that manipulating these genes can lengthen telomeres and that their regulation is crucial for understanding telomere biology.
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  • - This analysis studied the factors influencing physical activity levels in Samoan children aged 3-8 years, focusing on child, family, and household characteristics with data from 445 children (51.2% girls) in the Ola Tuputupua'e cohort.
  • - The study found that among 111 children deemed 'highly active', a significant correlation existed between sleep duration and activity levels, revealing that more sleep was linked to higher activity, particularly with those sleeping 10+ hours having the highest odds of being active.
  • - The authors suggest that improving sleep duration and quality could be an effective strategy to enhance physical activity and reduce obesity risk, warranting further research into the connection between sleep and activity levels in this population
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Background: The prevalence of obesity-related cardiometabolic disease in Samoa is among the highest globally. While physical activity is a modifiable risk factor for obesity-related disease, little is known about physical activity levels among adult Samoans. Using wrist-worn accelerometer-based devices, this study aimed to characterize physical activity among Samoan adults.

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The Federal Retail Pharmacy Program (FRPP) facilitated integration of pharmacies as partners in national efforts to scale up vaccination capacity during the COVID-19 pandemic emergency response. To evaluate FRPP's contribution to vaccination efforts across various sociodemographic groups, data on COVID-19 bivalent mRNA vaccine doses administered during September 1, 2022-September 30, 2023, were evaluated from two sources: 1) FRPP data reported directly to CDC and 2) jurisdictional immunization information systems data reported to CDC from all 50 states, the District of Columbia, U.S.

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Background: The cardiometabolic impact of HIV infection and treatment with antiretroviral therapy (ART) in pregnancy and the postpartum period remains unclear.

Methods: We enrolled pregnant persons with (PHIV) and without HIV in Cape Town, South Africa, who were ≥18 years old at 24-28 weeks' gestation and followed them up to 32 months postpartum. We estimated associations between HIV status and cardiometabolic risk including body mass index (BMI), obesity (BMI ≥30 kg/m), blood pressure (BP; elevated systolic BP ≥130 and/or diastolic ≥85 mmHg), lipid levels, and metabolic syndrome according to the Joint Interim Statement criteria using multivariable log binomial or linear regression models.

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  • The study investigates the relationship between migration and the occurrence of multiple chronic diseases (multimorbidity) among young adults in rural sub-Saharan Africa, focusing on a sample of 2,144 individuals.
  • Findings indicate that 14% of participants had chronic multimorbidity, with non-migrants exhibiting higher rates compared to migrants.
  • The research emphasizes the need to understand factors like education and migration in addressing health issues like HIV, hypertension, and obesity among young adults, highlighting the importance of targeted health strategies.
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  • The study investigates the prevalence and risk factors for elevated glycated hemoglobin (HbA1c) and blood pressure (BP) in Pacific children aged 6-9 years, focusing on their body mass index (BMI) from ages 2 to 5 and BMI changes over time in Samoa.
  • Out of 410 Samoan children examined, 12.90% had high HbA1c levels, and 33.17% showed elevated BP, with specific associations found between childhood BMI and these health indicators, particularly for males and females.
  • The findings suggest that tracking BMI changes in childhood can help with early screening and prevention of cardiometabolic diseases in this vulnerable population.
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Immunizations are an important tool to reduce the burden of vaccine preventable diseases and improve population health. High-quality immunization data is essential to inform clinical and public health interventions and respond to outbreaks of vaccine-preventable diseases. To track COVID-19 vaccines and vaccinations, CDC established an integrated network that included vaccination provider systems, health information exchange systems, immunization information systems, pharmacy and dialysis systems, vaccine ordering systems, electronic health records, and tools to support mass vaccination clinics.

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Sleep apnea is a public health concern around the world, but little research has been dedicated to examining this issue in low- and middle-income countries, including Samoa. Using data collected through the ("Good Health") study, which aimed to investigate the impact of the body mass index (BMI)-associated genetic variant rs373863828 in CREB3 Regulatory Factor ( ) on metabolic traits in Samoan adults, we examined the sample prevalence and characteristics of sleep apnea using data collected with a validated home sleep apnea device (WatchPAT, Itamar). A total of 330 participants (sampled to overrepresent the obesity-risk allele of interest) had sleep data available.

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Genotype imputation is fundamental to association studies, and yet even gold standard panels like TOPMed are limited in the populations for which they yield good imputation. Specifically, Pacific Islanders are poorly represented in extant panels. To address this, we constructed an imputation reference panel using 1,285 Samoan individuals with whole-genome sequencing, combined with 1000 Genomes (1000G) samples, to create a reference panel that better represents Pacific Islander, specifically Samoan, genetic variation.

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Objectives: Brown adipose tissue (BAT) is a heat-producing organ aiding nonshivering thermogenesis (NST) during cold stress. Due to its potential cold-adaptive role BAT has been predominantly studied in cold and temperate climate populations, but not among warm-climate adults. This work explores if BAT activity can be inferred in Samoans.

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Objectives: Recent studies suggest that early menarche may increase cardiometabolic morbidity and mortality. Yet few studies have examined this association in the Pacific Islands, where obesity prevalence is among the highest globally. We sought to examine associations between age at menarche and cardiometabolic risk in Samoa.

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Article Synopsis
  • - This study aimed to investigate how HIV status and different antiretroviral treatments relate to gestational diabetes (GDM) and glucose control after childbirth among pregnant individuals in Cape Town, South Africa.
  • - It included 397 participants, finding that those with HIV had a significantly higher risk of developing GDM (6% prevalence) compared to those without HIV, but there was no difference in GDM risk based on the ART regimens used (efavirenz vs dolutegravir).
  • - The research concluded that while pregnant persons with HIV face increased chances of impaired glucose metabolism, there were no significant differences in postpartum diabetes rates according to HIV status or ART type, highlighting the need for continued monitoring, especially concerning weight gain
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This paper demonstrates that internal migration may be contributing to rising non-communicable disease risk in low- and middle-income countries in gendered and geographically differentiated ways. With 2018 baseline data from the Migrant Health Follow-Up Study, we investigate the relationship between internal migration and elevated blood pressure (BP) among 2163 rural-origin men and women in South Africa, testing for sex differences. To examine the influence of place, we test whether the migration-BP relationship differs by migrants' destination locations, controlling for household composition, social support, prior migration, and housing quality.

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Identifying population-specific genetic variants associated with disease and disease-predisposing traits is important to provide insights into the genetic determinants of health and disease between populations, as well as furthering genomic justice. Various common pan-population polymorphisms at associate with serum lipid profiles and cardiovascular disease. Here, sequencing of identified a missense variant rs1597000001 (p.

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