Table 3. Sobel-mediation analyses.
|
Total Group (n = 130)
|
≤ 2 MDE (n = 71)
|
≥ 3 MDE (n = 59)
|
||||
|---|---|---|---|---|---|---|
| (IV – MV-DV a) | Prop. effectb | Significance (p) | Prop. effectb | Significance (p) | Prop. effectb | Significance (p) |
| Level 1 (Possible mediators of effect of MBCT on depression) | ||||||
| MBCT-KIMS - Depression | 46.8 | 0.005 | 76.7 | 0.005 | 20.1 | 0.326 |
| MBCT - Observe - Depression | 16.5 | 0.197 | 39.0 | 0.064 | -3.4 | 0.842 |
| MBCT - Describe - Depression | 12.9 | 0.154 | 3.3 | 0.657 | 31.3 | 0.119 |
| MBCT - Aware - Depression | 18.1 | 0.144 | 41.2 | 0.051 | -2.8 | 0.854 |
| MBCT - Accept - Depression | 25.2 | 0.038 | 48.2 | 0.033 | 8.8 | 0.428 |
| MBCT - RSS - Depression | 17.4 | 0.127 | 34.4 | 0.094 | 6.0 | 0.604 |
| MBCT-PSWQ - Depression | 51.0 | 0.002 | 85.6 | 0.003 | 25.4 | 0.158 |
| MBCT - PA - Depression | 60.9 | <0.001 | 50.7 | 0.038 | 80.1 | 0.007 |
| MBCT - NA - Depression | 44.4 | 0.009 | 39.9 | 0.112 | 51.1 | 0.036 |
| Level 2 (KIMS as possible mediator of effect of MBCT on rumination, worry, and affect) | ||||||
| MBCT-KIMS - RSS | 38.1 | 0.007 | 42.2 | 0.013 | 33.4 | 0.202 |
| MBCT-KIMS - PSWQ | 47.8 | <0.001 | 53.3 | 0.002 | 41.7 | 0.069 |
| MBCT-KIMS - PA | 29.8 | 0.018 | 41.5 | 0.083 | 20.8 | 0.108 |
| MBCT-KIMS - NA | 25.5 | 0.120 | 38.9 | 0.231 | 16.3 | 0.306 |
| Level 3 (Rumination, worry, and affect as possible mediators of effect of KIMS on depression) | ||||||
| KIMS - RSS - DepressionLevel 3 (Rumination, worry, and affect as possible mediators of effect of KIMS on depression) | 9.8 | 0.283 | 9.0 | 0.432 | 8.5 | 0.590 |
| KIMS-PSWQ - DepressionKIMS - RSS - Depression | 44.59.8 | 0.0020.283 | 48.79.0 | 0.0040.432 | 41.88.5 | 0.1160.590 |
| KIMS - PA - DepressionKIMS - PSWQ - Depression | 48.344.5 | <0.0010.002 | 29.548.7 | 0.0230.004 | 99.641.8 | 0.0130.116 |
| KIMS - NA - DepressionKIMS - PA - Depression | 32.948.3 | 0.014<0.001 | 23.829.5 | 0.0780.023 | 56.199.6 | 0.0870.013 |
| KIMS - NA - Depression | 32.9 | 0.014 | 23.8 | 0.078 | 56.1 | 0.087 |
| Level 4 (Affect as possible mediator of effect of rumination and worry on depression) | ||||||
| RSS - PA - DepressionLevel 4 (Affect as possible mediator of effect of rumination and worry on depression) | 48.4 | 0.035 | 58.9 | 0.014 | -1.0 | 0.986 |
| RSS - NA - DepressionRSS - PA - Depression | 58.248.4 | 0.0120.035 | 56.258.9 | 0.0220.014 | 57.0-1.0 | 0.2670.986 |
| PSWQ - PA - DepressionRSS - NA - Depression | 43.558.2 | <0.0010.012 | 31.356.2 | 0.0310.022 | 35.257.0 | 0.1710.267 |
| PSWQ - NA - DepressionPSWQ - PA - Depression | 37.543.5 | <0.001<0.001 | 33.431.3 | 0.0070.031 | 32.435.2 | 0.1670.171 |
| PSWQ - NA - Depression | 37.5 | <0.001 | 33.4 | 0.007 | 32.4 | 0.167 |
MBCT, Mindfulness Based Cognitive Therapy; Depression, residual symptoms depression; KIMS, Kentucky Inventory of Mindfulness Skills; RSS, Rumination on Sadness Scale; PSWQ, Penn State Worry Questionnaire; PA, Positive affect; NA, Negative affect.
a = IV, Independent Variable; MW, Mediating Variable; DV, Dependent Variable.
b = Prop. effect: Proportional effect, proportion of the total effect that is mediated.