A Systematic Review Investigating the Nonparticipation Rate and Recruitment Challenges in Yoga Trials for Addictive...

Area of Science:

• Addiction Medicine
• Integrative Medicine
• Clinical Trial Methodology

Background:

• Yoga shows promise as an alternative therapy for substance use disorders, aiding stress reduction and self-control.
• Significant barriers exist for participant engagement in yoga interventions for addiction.
• A systematic review is needed to understand nonparticipation in these trials.

Purpose of the Study:

• To determine the nonparticipation rate in randomized controlled trials (RCTs) of yoga for addictive disorders.
• To identify the primary reasons for nonparticipation in such yoga trials.

Main Methods:

• Searched Google Scholar, CENTRAL, and PubMed for relevant peer-reviewed RCTs.
• Extracted data using standard procedures and evaluated risk of bias.
• Conducted pooled and sensitivity analyses to determine nonparticipation rates and effect sizes.

Main Results:

• Approximately 54% of potential participants were not included in the analyzed trials.
• High heterogeneity (I² = 99.797) was observed in the pooled effect size (0.544).
• Exclusion criteria (medical/mental health conditions) and participant refusal/lack of interest were major reasons for noninclusion.

Conclusions:

• Understanding nonparticipation barriers is crucial for improving recruitment efficiency in addiction and yoga research.
• Identifying reasons for noninclusion can inform future study designs to minimize dropout and ensure sample representativeness.
• Addressing barriers like scheduling conflicts and health exclusions may enhance trial feasibility and generalizability.