Comparison of early-, late-, and non-participants in a school-based asthma management program for urban high school students.

ABSTRACT:

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 urban adolescents. In this paper, we describe characteristics by participant status of urban teens eligible to participate in a RCT of a school-based, web-based asthma management program.

Methods

The denominator for this analysis was all students found to be eligible to participate in the RCT. Data were analyzed for participants and non-participants of the RCT, as well as for students that enrolled during the initially scheduled recruitment period (early-participants) and persons

SUBMITTER: Joseph CL 

PROVIDER: S-EPMC3126736 | biostudies-literature | 2011 Jun

REPOSITORIES: biostudies-literature