Table 5.
Net monetary benefit regression with WTP set at 50,000 € per QALY
| Variable | Coefficient | p value |
|---|---|---|
| b (SE) | ||
| Group (ref.: control group) | −4,096.59 (3,894.24) | 0.29 |
| Study center (ref.: Leipzig) | −3,711.82 (5,016.88) | 0.46 |
| Group*Study Center | 8,446.42 (5,904.94) | 0.15 |
| Age at baseline (centered) | 623.33 (422.18) | 0.14 |
| Gender (ref.: male) | 3,888.47 (3,732.30) | 0.30 |
| EQ-5D index at baseline (centered) | 41,391.13 (7,215.78) | 0.00** |
| 18-month costs at baseline (centered) | −0.44 (0.22) | 0.04* |
| MMSE score at baseline (centered) | 922.17 (721.08) | 0.20 |
| Barthel index score at baseline (centered) | 221.85 (206.14) | 0.28 |
| IADL score at baseline (centered) | 3,570.256 (1,534.46) | 0.02* |
| GDS score at baseline (reversed, centered) | 3,529.91 (1,759.86) | 0.05* |
| Intercept | 19,761.49 (4,284.06) | 0.00 |
n = 278; bootstrapped standard errors (SE) based on 4,000 replications; R2: 0.55; GDS: Geriatric depression scale; IADL: Instrumental activities of daily living; MMSE: Mini mental state examination; *p ≤ 0.05; **p ≤ 0.001.