Do we agree on health state outcomes? A review of measurement agreement between time-trade off and other utility measures

Abstract Aim The aim of this review is to investigate the measurement agreement of time trade-off (TTO) and direct/indirect health utility measurements methods. Discrepancies have been reported between utility elicitation methods, thus the study objective was to collect all empirical studies that investigated measurement by Bland–Altman analysis (BA) and estimate overall means differences. Methods A systematic literature review was performed in 2025 April, on three online databases (PubMed, Web