Table 2.
Mean values for symptoms of depression and quality of life over the course of the intervention, within-group effect sizes.
| Intervention | T0 (baseline) | T1 (approximately after 3 weeks) | T2 (approximately after 6 weeks) | T3 (approximately after 3 months) | T4 (approximately after 6 months) | T5 (approximately after 12 months) | Within-group ESa (T0-T2) | Within-group ESa (T2-T5) | |||||||||||||
|
|
Mean (SD) | n | Mean (SD) | n | Mean (SD) | n | Mean (SD) | n | Mean (SD) | n | Mean (SD) | n | Cohen d | 95% CI | Cohen d | 95% CI | |||||
| IDS-SRb | |||||||||||||||||||||
|
|
iFDc | 27.5 (8.9) | 173 | 24.3 (9.1) | 148 | 20.8 (9.4) | 135 | 19.3 (11.4) | 126 | 19.8 (11.2) | 122 | 19.8 (10.8) | 119 | −0.718 | −0.937 to −0.501 | −0.182 | −0.394 to 0.032 | ||||
|
|
PMRd | 27.9 (8.8) | 174 | 24.8 (10.4) | 144 | 23.1 (10.3) | 129 | 22.0 (11.7) | 125 | 21.2 (11.5) | 113 | 19.5 (11.0) | 110 | −0.619 | −0.835 to −0.403 | −0.372 | −0.584 to −0.159 | ||||
| SF-12 MCSe | |||||||||||||||||||||
|
|
iFD | 33.6 (8.3) | 173 | 35.6 (9.0) | 146 | 38.9 (9.7) | 133 | 40.3 (10.8) | 126 | 40.2 (11.5) | 122 | 39.8 (11.1) | 119 | 0.519 | 0.304 to 0.734 | 0.056 | −0.156 to 0.267 | ||||
|
|
PMR | 33.3 (8.1) | 174 | 34.8 (9.7) | 142 | 36.1 (10.2) | 129 | 37.6 (10.1) | 125 | 38.7 (10.5) | 113 | 41.2 (10.0) | 110 | 0.223 | 0.012 to 0.435 | 0.446 | 0.233 to 0.660 | ||||
| SF-12 PCSf | |||||||||||||||||||||
|
|
iFD | 46.9 (9.0) | 173 | 48.1 (9.1) | 146 | 47.3 (9.9) | 133 | 48.8 (9.7) | 125 | 48.7 (8.6) | 122 | 47.8 (9.3) | 119 | 0.093 | −0.118 to 0.305 | −0.040 | −0.252 to 0.171 | ||||
|
|
PMR | 47.2 (9.9) | 174 | 46.8 (9.8) | 142 | 47.3 (9.7) | 129 | 47.9 (8.9) | 126 | 46.4 (9.9) | 113 | 47.0 (9.8) | 110 | −0.038 | −0.249 to 0.173 | −0.092 | −0.303 to 0.119 | ||||
| PHQ-9g | |||||||||||||||||||||
|
|
iFD | 9.1 (3.6) | 173 | 7.9 (3.7) | 146 | 6.9 (3.7) | 133 | 7.0 (4.4) | 126 | 7.4 (4.8) | 122 | 6.7 (4.2) | 119 | −0.571 | −0.898 to −0.356 | 0.012 | −0.120 to 0.223 | ||||
|
|
PMR | 9.7 (3.3) | 173 | 8.2 (3.8) | 142 | 7.4 (3.7) | 129 | 7.9 (4.4) | 125 | 7.9 (4.1) | 113 | 6.7 (4.6) | 110 | −0.800 | −1.019 to −0.580 | −0.066 | −0.277 to 0.145 | ||||
aES: effect size, calculated based on imputed data sets.
bIDS-SR: Inventory of Depressive Symptomatology–self rating.
ciFD: iFightDepression.
dPMR: progressive muscle relaxation.
eSF-12 MCS: Short-Form 12 mental component score.
fSF-12 PCS: Short-Form 12 physical component score.
gPHQ-9: patient health questionnaire 9.