Figure 2From: Inter-method reliability of paper surveys and computer assisted telephone interviews in a randomized controlled trial of yoga for low back painMean RMDQ over time using all available paper-only data and CATI-only data. Bars indicate 95% confidence interval. RMDQ: modified Roland Morris Disability Questionnaire (0-23 where higher scores reflect worse back pain-related function); CATI: computer assisted telephone interview.Back to article page