Table 3.
12-week change in RDQ* associated with 6-week mediator values.
| Main cohort** | Saliva cohort*** | |||||||
|---|---|---|---|---|---|---|---|---|
| Change in RDQ* | SE | 95% CI | P value | Change in RDQ∗ | SE | 95% CI | P value | |
| Yoga versus self-care | ||||||||
| Fear avoidance | 0.10 | 0.05 | (−0.01, 0.20) | 0.062 | 0.11 | 0.06 | (−0.01, 0.23) | 0.069 |
| Self-efficacy | −1.17 | 0.21 | (−1.59, −0.74) | 0.0000003 | −1.23 | 0.27 | (−1.76, −0.69) | 0.00002 |
| Conscious awareness of body | −0.13 | 0.06 | (−0.25, −0.02) | 0.027 | −0.05 | 0.08 | (−0.20, 0.10) | 0.491 |
| Psychological distress | 0.05 | 0.05 | (−0.04, 0.15) | 0.287 | 0.02 | 0.06 | (−0.10, 0.14) | 0.700 |
| Perceived stress | 0.08 | 0.07 | (−0.07, 0.22) | 0.296 | 0.01 | 0.09 | (−0.17, 0.18) | 0.955 |
| Positive states of mind | −0.12 | 0.15 | (−0.41, 0.17) | 0.418 | −0.16 | 0.19 | (−0.55, 0.22) | 0.402 |
| Improved sleep | 2.51 | 0.70 | (1.11, 3.90) | 0.00055 | 2.26 | 0.84 | (0.58, 3.94) | 0.009 |
| Hours of back exercise | −0.46 | 0.263 | (−0.99, 0.06) | 0.081 | −0.59 | 0.32 | (−1.23, 0.05) | 0.070 |
| DHEA change in diurnal average (log scale) | — | — | — | — | −0.60 | 0.89 | (−2.38, 1.18) | 0.502 |
| Average cortisol awakening response | — | — | — | — | −0.88 | 0.41 | (−1.70, −0.06) | 0.035 |
| Stretching versus self-care | ||||||||
| Fear avoidance | 0.20 | 0.05 | (0.10, 0.30) | 0.000094 | 0.26 | 0.07 | ( 0.13, 0.39) | 0.00017 |
| Self-efficacy | −0.72 | 0.24 | (−1.19, −0.25) | 0.003 | −0.75 | 0.29 | (−1.32, −0.17) | 0.012 |
| Conscious awareness of body | −0.05 | 0.05 | (−0.15, 0.04) | 0.240 | 0.01 | 0.06 | (−0.12, 0.13) | 0.921 |
| Psychological distress | 0.05 | 0.04 | (−0.04, 0.13) | 0.252 | 0.04 | 0.06 | (−0.08, 0.14) | 0.528 |
| Perceived stress | 0.00 | 0.08 | (−0.16, 0.15) | 0.979 | −0.03 | 0.10 | (−0.23, 0.18) | 0.794 |
| Positive states of mind | −0.41 | 0.15 | (−0.70, −0.12) | 0.0064 | −0.43 | 0.20 | (−0.83, −0.03) | 0.035 |
| Improved sleep | 2.43 | 0.66 | (1.12, 3.74) | 0.00038 | 2.55 | 0.80 | (0.95, 4.16) | 0.002 |
| Hours of back exercise | −0.53 | 0.26 | (−1.04, −0.03) | 0.040 | −0.31 | 0.31 | (−0.92, 0.30) | 0.307 |
| DHEA change in diurnal average (log scale) | — | — | — | — | 1.20 | 0.77 | (−0.33, 2.73) | 0.122 |
| Average cortisol awakening response | — | — | — | — | −0.71 | 0.39 | (−1.49, 0.07) | 0.073 |
*RDQ: Roland Morris Disability Questionnaire.
**Adjusted for baseline variables age, sex, BMI, back pain days, work type, pain traveling down the leg, bothersomeness, and RDQ.
***Same adjustments as main cohort analysis with the addition of alcohol, tobacco and medication use on the day of saliva sample collection.