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Comparison of early-, late-, and non-participants in a school-based asthma management program for urban high school students
BACKGROUND: To assess bias and generalizability of results in randomized controlled trials (RCT), investigators compare participants to non-participants or early- to late-participants. Comparisons can also inform the recruitment approach, especially when working with challenging populations, such as...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2011
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3126736/ https://www.ncbi.nlm.nih.gov/pubmed/21645394 http://dx.doi.org/10.1186/1745-6215-12-141 |