Table 4.
Subgroup analysis: hazard ratio between groups on major depressive episode (MDE) onset stratified by K6 score (post hoc)
| N | Person‐months Observed | Case (N) | Incident rate (per months) | Survival time Mean (SE) | Hazard ratio | 95% CI low | 95% CI high | P‐value | |
|---|---|---|---|---|---|---|---|---|---|
| K6 ≤ 4 | |||||||||
| iCBT program | 1159 | 7365 | 10 | 0.136 | 12.91 (0.03) | 1.76 | 0.64 | 4.85 | 0.273 |
| Control | 1160 | 7185 | 6 | 0.084 | 13.94 (0.03) | 1.00 | – | – | |
| Subtotal | 2319 | 14 550 | 16 | 0.110 | 13.92 (0.02) | ||||
| 5 ≤ K6 ≤ 8 | |||||||||
| iCBT program | 732 | 4560 | 10 | 0.219 | 13.82 (0.06) | 0.38 | 0.19 | 0.79 | 0.009 |
| Control | 735 | 4929 | 28 | 0.568 | 13.54 (0.09) | 1.00 | – | – | |
| Subtotal | 1467 | 9489 | 38 | 0.400 | 13.68 (0.05) | ||||
| 9 ≤ K6 | |||||||||
| iCBT program | 618 | 3787 | 39 | 1.030 | 13.17 (0.13) | 1.04 | 0.67 | 1.63 | 0.853 |
| Control | 613 | 3974 | 39 | 0.981 | 12.31 (0.11) | 1.00 | – | – | |
| Subtotal | 1231 | 7761 | 78 | 1.005 | 13.20 (0.09) | ||||
| Total | 5017 | 32 430 | 132 | 0.407 | 13.67 (0.28) | ||||
Values in bold indicates statistically significant difference.