Jeroen van de Pol

108 Chapter 4 c Figure 1a, b, c: Acceptability curves based on willingness to pay for a) costs/QALY measured with EQ-5D, b) costs/QALY measured with EQ-VAS and c) costs/effects determined as reduced complaints with impact. NB. QALY = quality-adjusted life year. Table 1: Mean values for health-related quality of life and complaints over time in the control and intervention group. Definition complaint with impact = Severity VAS-score ≥ 5 and influence on daily life: moderate, severe, extreme. Abbreviations: EQ-5D = EuroQol-5D; VAS = Visual Analogue Scale; SD = standard deviation. Control group (n = 294) Intervention group (n = 294) Outcome (mean, SD) Baseline T1: 3 months T2: 6 months Baseline T1: 3 months T2: 6 months EQ-5D-5L, utility values 0.74 ± 0.18 0.74 ± 0.17 0.74 ± 0.18 0.73 ± 0.18 0.74 ± 0.17 0.73 ± 0.19 EQ-VAS 71 ± 16 69 ± 16 69 ± 16 69 ± 16 69 ± 16 70 ± 16 Health-related complaints with impact 2.6 ± 2.4 2.5 ± 2.2 2.5 ± 2.4 2.7 ± 2.4 2.5 ± 2.3 2.3 ± 2.4