Accounts from developers of generic health state utility instruments explain why they produce different QALYs: A qualitative study

Despite the label "generic" health state utility instruments (HSUIs), empirical evidence shows that different HSUIs generate different estimates of Health-Related Quality of Life (HRQoL) in the same person. Once a HSUI is used to generate a QALY, the difference between HSUIs is often ignored, and decision-makers act as if 'a QALY is a QALY is a QALY'. Complementing evidence that different generic HSUIs produce different empirical values, this...