Table 3.
Utility and generic scores
| Instrument group
|
Utility
|
Generic
|
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Instrument (group tested) | SF6D (h) | HUI2 and HUI3 (h) | EQ-5D (h/k) | EQ-5D (h) | EQ-5D (k) | SF-36 (h/k) | SF-36 (h) | SF-36 (k) | SF-12 (h/k) | SF-12 (h) | SF-12 (k) | SIP (h) |
| Number of studies | 1 | 4 | 9 | N/a | N/a | 14 | N/a | N/a | 3 | N/a | N/a | 2 |
| Reproducibility | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ++ | 0 | 0 | 0 |
| Internal consistency | 0 | 0 | N/a | N/a | N/a | 0 | 0 | − | 0 | 0 | 0 | 0 |
| Validity: content | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | + |
| Construct | 0 | ++ | + | 0 | + | + | 0 | + | 0 | 0 | + | + |
| Responsiveness | ++ | + | 0 | 0 | + | 0 | ++ | + | 0 | + | + | − |
| Interpretability | 0 | 0 | 0 | ++ | ++ | 0 | + | + | 0 | + | + | 0 |
| Floor/ceiling/precision | − | 0 | 0 | 0 | ++ | 0 | − | 0 | +++ | 0 | 0 | − |
| Acceptability | 0 | 0 | 0 | 0 | ++ | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Notes: Psychometric and operational criteria: “0” not reported; “−” no evidence in favor; “+” some limited evidence in favor; “++” some good evidence in favor”; “+++” good evidence in favor.
Abbreviations: SF6D, Short Form 6D; HUI2 and HUI3, Health Utilities Index Mark 2 and Mark 3; EQ-5D, European Quality of Life Questionnaire 5D; SF-12, Short Form 12; SF-36, short form 36; SIP, sickness impact profile; h, hip; k, knee; N/a, not applicable.