The effects of lead time and visual aids in TTO valuation: a study of the EQ-VT framework.
Nan Luo, Minghui Li, Elly A Stolk, Nancy J Devlin
European Journal of Health Economics | Published : 2013
BACKGROUND: The effect of lead time in time trade-off (TTO) valuation is not well understood. The purpose of this study was to investigate the effects on health-state valuation of the length of lead time and the way the lead-time TTO task is displayed visually. METHODS: Using two general population samples, we compared three lead-time TTO variants: 10 years of lead time in full health preceding 5 years of unhealthy time (standard); 5 years of lead time preceding 5 years of unhealthy time (experimental); and 10 years of lead time and 5 years of unhealthy time, presented with a visual aid to highlight the point where the lead time ends (experimental). Participants were randomized to receive on..View full abstract