Table 4.
Linear Regression Analysis of Univariable Associations of Change Between Each Potential Mediator and Functional Outcome Score Posttreatment (b Path).a
| Outcome | Predictor (Potential Mediator) | Treatment Allocation | Unstandardized B (SE) | 95% CI | Standardized b | r 2 Change |
|---|---|---|---|---|---|---|
| RMDQ | Change in illness perceptions | Treatment | 2.07 (0.32) | 1.44 to 2.70 | 0.53 | .28 |
| RMDQ | Change in pain catastrophizing | Treatment | 1.11 (0.39) | 0.35 to 1.87 | 0.27 | .07 |
| RMDQ | Change in back pain myths | Treatment | –0.63 (0.36) | −1.31 to 0.10 | −0.16 | .03 |
| RMDQ | Change in illness perceptions | Control | 2.19 (0.43) | 1.33 to 3.05 | 0.44 | .20 |
| RMDQ | Change in pain catastrophizing | Control | 1.86 (0.41) | 1.06 to 2.67 | 0.41 | .17 |
| RMDQ | Change in back pain myths | Control | –1.02 (0.49) | −1.98 to −0.05 | −0.20 | .04 |
aRMDQ = Roland-Morris Disability Questionnaire.