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Optimizing the scientific yield from a randomized controlled trial (RCT): evaluating two behavioral interventions and
Michael P Carey1, Theresa E Senn, Patricia Coury-Doniger
1Centers for Behavioral and Preventive Medicine, The Miriam Hospital, Providence, RI 02906, USA. Michael_Carey@brown.edu
Contemporary Clinical Trials
|July 3, 2013
Summary
This study optimized randomized controlled trials (RCTs) by evaluating two health interventions and assessment reactivity simultaneously. Baseline data revealed high rates of sexual risk behaviors and substance use among participants.
Area of Science:
- Public Health
- Health Promotion
- Clinical Trials
Background:
- Randomized controlled trials (RCTs) are crucial for intervention efficacy but are resource-intensive.
- Optimizing RCTs to address multiple research questions can enhance scientific yield.
- The modified Solomon four-group design offers a method for simultaneous evaluation within an RCT.
Purpose of the Study:
- To describe a modified Solomon four-group randomized controlled trial (RCT) design.
- To simultaneously evaluate two distinct health promotion interventions: general health promotion and sexual risk reduction.
- To assess assessment reactivity and baseline health behaviors in a large, diverse cohort.
Main Methods:
- A modified Solomon four-group design was employed with 1010 participants (56% male; 69% African American).
- Participants were randomly assigned to one of four conditions, crossing intervention type (general health vs. sexual risk reduction) with assessment type (general health vs. sexual health survey).
- Baseline data on health behaviors, substance use, and intervention satisfaction were collected and analyzed.
Main Results:
- Baseline data indicated high prevalence of sexual risk behaviors, alcohol, marijuana, and tobacco use, and fast food consumption.
- Significant correlations were observed between sexual risk behaviors and substance use.
- Participants reported high satisfaction with both interventions, with higher ratings for the sexual risk reduction intervention.
Conclusions:
- The modified Solomon four-group design effectively allows for simultaneous evaluation of multiple interventions and assessment reactivity within a single RCT.
- Baseline findings highlight significant public health concerns regarding sexual risk and substance use in the study population.
- Further analyses will examine changes in health behaviors over the 12-month follow-up period, demonstrating the utility of this optimized RCT design.
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