Characteristic Correlation Coefficient (r) with ΔRMDQ p-value Correlation Coefficient (r) with ΔLBPS p-value Baseline RMDQ -0.33 0.001 -0.18 0.10 Baseline LBPS -0.09 0.42 -0.46 <.001 SF-36 PCS 0.36 <.001 0.34 0.001 SF-36 MCS -0.12 0.26 -0.04 0.69 BMI (n=90) -0.15 0.17 -0.03 0.79 Missed days of work (n=89) 0.26 0.015 0.14 0.20 Hours worked in previous week (n=88) 0.02 0.82 0.03 0.75 Days of decreased activity due to LBP in last 4 weeks (n=89) -0.06 0.55 -0.00 0.99 Hours of pain/day (n=89) 0.12 0.27 0.10 0.38

Table 3: Bivariate analysis of baseline continuous variables and change in primary outcome measures for 91 participants* enrolled in a 12-week yoga trial for chronic low back pain *unless otherwise specified Abbreviations: ΔRMDQ = Change in modified Roland-Morris disability questionnaire score ΔLBPS = Change in low back pain score SF-36 = Short form 36 PCS = Physical Health Component Score MCS = Mental Health Component Score BMI = Body mass index LBP = low back pain