Table 4 Methodological quality of each study per measurement property and PROM
Author (Year) | PROM | Internal consistency | Test-retest reliability | Measurement error | Content validity | Structural validity | Hypothesis testing | Criterion validity | Cross structural validity |
|---|---|---|---|---|---|---|---|---|---|
| Â | Â | Discriminant validity | Concurrent validity | Â | |||||
Kim (2000) | NIDDK-QA | Poor | Poor | NR | NR | NR | Poor | Poor | NR |
Gross (1999) | NIDDK-QA | Poor | NR | NR | NR | NR | NR | NR | NR |
Younossi, (2017) | PSC PROM | Fair | Fair | NR | Excellent | Fair | NR | NR | NR |