Table 4 Explanative models for WTP/QALY (estimated by the utilities function)

High income area

0.507 (0.101–0.913)

0.387 (-0.095–0.868)

Age

-0.021 (-0.033– -0.009)

-0.037 (-0.051– -0.022)

Female

-0.671 (-1.030– -0.311)

-0.558 (-0.985– -0.132)

High education level

0.680 (0.234–1.127)

0.758 (0.228–1.287)

Another insurance

0.774 (0.247–1.300)

0.842 (0.219–1.464)

Adjusted family income (€1,000)

0.662 (0.245–1.080)

0.824 (0.331–1.317)

Family members

0.124 (0.001–0.247)

0.108 (-0.037–0.254)

Doctor consultations/year

0.020 (0.005–0.034)

0.016 (-0.001–0.033)

Tobacco consumption

-0.515 (-0.985– -0.045)

-0.258(-0.815–0.300)

Alcohol consumption

1.081 (0.164–1.997)

1.380 (0.294–2.466)

Other drug consumption

3.192 (1.015–5.369)

-0.465 (-2.746–1.816)

Inclination to risk (subjective 1–10)

0.079 (0.015–0.143)

0.068 (-0.008–0.144)

Inclination to risk (lottery games)

0.972 (0.352–1.591)

0.610 (-0.113–1.333)

WTP values in descending order

0.222 (-0.110–0.554)

0.501 (0.109–0.893)

Constant

5.495 (4.030–6.960)

6.445 (4.717–8.174)

Variance of the constant

0.053 (0.005–0.537)

0.079 (0.008–0.770)

Residual variance

3.001 (2.624–3.434)

4.202 (3.673–4.807)

Intraclass correlation coefficient

0.017

0.018

Observations = 447

Observations = 449

-2LL = -883.3

-2LL = -963.0

Chi²(14) = 202.92

Chi²(14) = 182.15

Prob > chi² = 0.0000

Prob > chi² = 0.0000