Table 3.
Summary of Preacher and Hayes mediator model analyses (5000 bootstraps) between pain (IV), and recurrence of depressive disorder (DV) through subthreshold depression severity as measured by the QIDS (M) 2
| Pain variables (IV) | Mediating variable (M) | Dependent variable (DV) | Effect of IV on M (a) | Effect of M on DV (b) |
Direct effect (c’) |
Indirect effect (a x b) | 95% CI (ab) |
Total effect (c) |
||
|---|---|---|---|---|---|---|---|---|---|---|
| Effect | p | Effect | p | |||||||
| Neck1 |
Subthreshold depression severity |
Recurrence of depression |
1.55** |
.16** |
.25 |
.14 |
.25 |
(.14-.36)^ |
.47 |
.004 |
| Back1 |
1.40** |
.16** |
.05 |
.76 |
.23 |
(.13-.34)^ |
.27 |
.09 |
||
| Head1 |
1.25** |
.16** |
.12 |
.48 |
.20 |
(.11-.31)^ |
.30 |
.05 |
||
| Abdominal1 |
1.79** |
.16** |
.35 |
.06 |
.28 |
(.17-.41)^ |
.60 |
.001 |
||
| Chest1 |
2.51** |
.16** |
.43 |
.10 |
.40 |
(.23-.59)^ |
.77 |
.002 |
||
| Joints1 |
1.21** |
.16** |
.16 |
.37 |
.19 |
(.10-.30)^ |
.34 |
.04 |
||
| Number of pain locations1 |
.42** |
.15** |
.06 |
.12 |
.07 |
(.04-.09)^ |
.12 |
.001 |
||
| Chronic Pain Grade | .74** | .16** | .08 | .36 | .12 | (.07-.18)^ | .18 | .02 | ||
*p < .05, **p < .001, ^ significant based on 95% confidence interval (CI).
1Pain location was only taken into account when CPG ≥ 2.
2Adjusted for age, gender, years of education and recency of last episode of depressive and/or anxiety disorder.