Table 24:
Cost–Utility Analysis: Stepped-Care iCBT, In-Person CBT, and Usual Care for Major Depression
| Strategy | Mean Costs, $a | Mean QALYs | Incremental Costs, $a,b | Incremental QALYsc | ICER: Strategy vs. Usual Care, $/QALY Gained |
|---|---|---|---|---|---|
| Usual care | 409.40 | 0.7869 | – | – | – |
| Unguided followed by guided iCBT | 715.41 | 0.8026 | 306.00 | 0.0157 | 19,454 |
| Group CBT | 1,690.18 | 0.8171 | 974.77 | 0.0145 | 67,161 |
| Individual CBT | 2,654.39 | 0.8267 | 964.22 | 0.0096 | 100,316 |
Abbreviations: CBT, cognitive behavioural therapy; CrI, credible interval; ICER, incremental cost-effectiveness ratio; QALY, quality-adjusted life-year.
a
All costs in 2018 Canadian dollars. No discounting was done because of the 12-month time horizon.
b
Incremental cost = average cost (strategy unguided CBT) – average cost (strategy usual care).
c
Incremental effect = average effect (strategy guided CBT) – average effect (strategy usual care).
Note: Results may appear incorrect because of rounding.