Table 5 Net monetary benefit regression with WTP set at 50,000 € per QALY

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