Introduction Increasing children’s cycling to school and physical activity are national health goals. The objective was to conduct an RCT of a bicycle train program to assess impact on students’ school travel mode and moderate to vigorous physical activity (MVPA). Study design Pilot cluster RCT with randomization at the school level and N=54 participants. Setting/participants Fourth–fifth graders from four public schools serving low-income families in Seattle, WA in 2014 with analyses in 2015–2016. All participants were provided and fitted with bicycles, safety equipment (helmets, locks, and lights), and a 2 to 3–hour bicycle safety course. Intervention The intervention was a bicycle train offered daily (i.e., students volunteered to cycle with study staff to and from school). Main outcome measures Time 1 assessments occurred prior to randomization. Time 2 assessments occurred after 3–5 weeks of the intervention (i.e., during Weeks 4–6 of the intervention period). The primary outcome was the percentage of daily commutes to school by cycling measured by validated survey. MVPA, measured by accelerometry and GPS units and processed by machine learning algorithms, was a secondary outcome. Results For two separate adjusted repeated measures linear mixed effects models in which students (N=54) were nested within schools (N=4), intervention participants had: (1) an absolute increase in mean percentage of daily commutes by cycling of 44.9%, (95% CI=26.8, 63.0) and (2) an increase in mean MVPA of 21.6 minutes/day, (95% CI=8.7, 34.6) from Time 1 to Time 2 compared with controls. Conclusions A pilot bicycle train intervention increased cycling to school and daily MVPA in the short term among diverse, inner-city elementary school students. The bicycle train intervention appears promising and warrants further experimental trials among large, diverse samples with longer follow-up. Clinicaltrial.gov identifier number NCT02006186; Date of registration: December 4, 2013.
Urban African Americans are disproportionately affected by HIV, the virus associated with AIDS. Although incidence and mortality appear to be decreasing in some populations, they continue to remain steady among inner-city African Americans. A major concern is the number of HIV-positive individuals who continue to practice high-risk behaviors. Understanding factors that increase risks is essential for the development and implementation of effective prevention initiatives. Following a constructionist epistemology, this study used ethnography to explore social and cultural factors that influence high-risk behaviors among inner-city HIV-positive African Americans. Leininger's culture care diversity and universality theory guided the study. Individual qualitative interviews were conducted with HIV-positive African Americans in the community to explore social and cultural factors that increase HIV-risky behaviors. For this study, family/kinship, economic, and education factors played a significant role in risky behaviors. Reducing HIV disparity among African Americans is dependent on designing appropriate interventions that enhance protective factors. Clinicians providing care to HIV-positive individuals can play a key role in reducing transmission by recognizing and incorporating these factors when designing effective prevention interventions.
Objectives Antiretroviral (ARV) adherence is a strong predictor of improved health outcomes and treatment effectiveness among persons living with HIV. Food insecurity and low social support are have been demonstrated to predict reported nonadherence among pregnant women, but the relationship has not been evaluated using an objective indicator of adherence. Therefore, we explored the impacts of social support and food insecurity on ARV adherence using ARV drug concentrations in hair among postpartum Kenyan women living with HIV. Methods Hair samples were collected from 83 HIV + women, a subset from an observational pregnancy cohort study (NCT02974972), on Efavirenz (n = 58) and Nevirapine (n = 25)-based ARVs at nine months postpartum. Hair ARV concentrations were log transformed to approximate a normal distribution. Food insecurity [Individual Food Insecurity Access Scale (IFIAS, 0–27)], social support (Perceived Social Support Scale, 0–40), and quality of life (Short Form 8 Health Survey, 0–40] were recalled for the prior month. These covariables, along with sociodemographic characteristics, were included in a multivariable linear regression model (P < 0.2) and eliminated using a backward stepwise approach (P < 0.1). Results Mean IFIAS score was 10.0 (± 5.2). Lower food insecurity and greater quality of life were significantly associated with higher hair ARV concentrations. Each point increase in IFIAS and decrease in quality of life was associated with a 13.4% decrease (95%CI: −0.23, −0.05) and 15.7% decrease (95%CI: 0.06, 0.23) in hair levels, respectively. Social support was not significantly associated with ARV adherence in bivariate analysis, but did buffer against the negative impacts of food insecurity on ARV adherence in the final multivariable model (Figure 1). Conclusions This study demonstrates that low food insecurity is significantly associated with higher ARV adherence among postpartum women using an objective biomarker, and that social support can buffer the negative effect of food insecurity on adherence. Interventions addressing these modifiable barriers to ARV adherence should be explored to improve adherence among HIV + postpartum women. Funding Sources The study was supported by the National Institute of Mental Health and the National Institute of Allergy and Infectious Diseases. Supporting Tables, Images and/or Graphs
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