Journal of urban health : bulletin of the New York Academy of Medicine
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We sought to leverage the strengths of time location sampling (TLS) and respondent-driven sampling (RDS) for surveys of hidden populations by combing elements of both methods in a new approach we call "starfish sampling." Starfish sampling entails random selection of venue-day-time units from a mapping of the locations where the population can be found, combined with short chains of peer referrals from their social networks at the venue or presenting to the study site later. Using the population of transmen in San Francisco as a case example, we recruited 122 eligible participants using starfish sampling: 79 at randomly selected venues, 11 on dating applications, and 32 by referral. Starfish sampling produced one of the largest community-recruited samples specifically for transmen to date. Starfish sampling is a flexibility method to recruit and sample hidden populations for whom conventional TLS and RDS may not work in theory or practice.
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The third from last sentence of the abstract, which reads: "However, U-5MR shows reversal to a significant urban advantage in 2015/2016, and slight increases in urban advantage are noted for infant mortality rate, underweight, full childhood immunization, and stunting rate in 2015/2016".
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Abstract
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Comparative Study
Contributions of Neighborhood Parks to Physical Activity in High-Poverty Urban Neighborhoods.
Neighborhood parks are important venues for the urban population to do moderate-to-vigorous physical activity in leisure time. Parks can be particularly important for low-income neighborhoods, whose residents suffer from high rates of chronic diseases and may have less access to fee-based fitness exercise facilities. ⋯ Parks' contribution to physical activity was positively associated with park size (β = 0.13, p < 0.0001) and negatively associated with poverty (β = - 0.10, p < 0.0001) and local population density (β = - 0.25, p = 0.005). Parks in high-poverty neighborhoods in Los Angeles are underutilized, and more efforts are needed to fully realize their potential for population health.
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There were two errors in this article as originally published: Coauthor Olga L. Sarmiento was listed with an affiliation-Children's Hospital of Eastern Ontario Research Institute-that does not apply to her (only "Universidad de los Andes Bogota, Colombia" is a correct affiliation for her).