How do older adults receiving aged care services understand and respond to the EQ-5D-5L? A think-aloud study in residential care.

Purpose: The EQ-5D-5L is a preference-based instrument for measuring and valuing health-related quality of life (HRQoL). The EQ-5D-5L has been used extensively in economic evaluation, including in aged care. However, older adults' understanding of the EQ-5D-5L has not been comprehensively investigated to date.