Table 5.
Total, Direct, and Indirect Effects of the COPE Intervention Via Change in Illness Perceptions and Change in Pain Catastrophizing on Posttreatment Disability Score.a
| Mediator | Effect | Modelb Without Interaction Term | Modelb With Interaction Term Added | ||
|---|---|---|---|---|---|
| Standardized Estimate (95% CI) | Unstandardized Estimate (95% CI) | Standardized Estimate (95% CI) | Unstandardized Estimate (95% CI) | ||
| Change in illness perceptions | Total (c΄) | 0.08 (−0.05 to 0.19) | 0.68 (−0.43 to 1.68) | −0.00 (−0.13 to 0.11) | −0.03 (−1.06 to 0.90) |
| Direct (c) | −0.01 (−0.13 to 0.10) | −0.08 (−1.08 to 0.89) | −0.01 (−0.13 to 0.11) | −0.08 (−1.18 to 0.89) | |
| Indirect (ab) | 0.09 (0.03 to 0.16) | 0.76 (0.29 to 1.35) | 0.01 (−0.01 to 0.03) | 0.05 (−0.07 to 0.26) | |
| Change in pain catastrophizing | Total (c΄) | 0.08 (−0.05 to 0.19) | 0.68 (−0.43 to 1.68) | −0.00 (−0.13 to 0.11) | −0.03 (−1.06 to 0.90) |
| Direct (c) | −0.03 (−0.11 to 1.14) | −0.23 (−0.92 to 1.21) | −0.02 (−0.14 to 0.09) | −0.16 (−1.21 to 0.78) | |
| Indirect (ab) | 0.05 (0.01 to 0.12) | 0.45 (0.12 to 1.10) | 0.02 (−0.00 to 0.06) | 0.14 (−0.01 to 0.50) | |
aCOPE = Cognitive Patient Education, RMDQ = Roland-Morris Disability Questionnaire.
bAdjusted for pain intensity, pain duration, and clinician type.