Gerhards, S.A.H.

depression treatment health study change group month utility participant therapy follow-up outcome patient trial score improvement baseline effect result support research difference intervention bdi-ii netherland computer –behavioural therapy maastricht university psychiatry adherence behavioural therapy colour tau group graaf value program cost-effectiveness 12 months tariff bdi –ii eq -5dnl computerised sf -6d measure maastricht -5dnl dutch -5duk method depressive university analysis interview healthcare interviewee treatment adherence quality point population anchor behavioural eq -5d journal people disorder internet aspect session uk tariff table analyses –behavioural health care sample eq -5duk instrument effectiveness course severity symptom