Quality assessment table
| Reliability | Validity | ||||
|---|---|---|---|---|---|
| Scale | Internal consistency | Test-retest | Content | Construct | Responsiveness |
| +++/+++: signs before the slash refer to results of validity, reliability, and responsiveness testing and signs behind the slash refer to thoroughness (strength of evidence) of validity, reliability, and responsiveness testing. | |||||
| Results of validity, reliability, and responsiveness testing: 0 no numerical results reported, ? results not interpretable, − poor results, + fair results, ++ moderate results, +++ good results. | |||||
| Thoroughness of validity, reliability, and responsiveness testing: 0 no reported evidence, ? results not interpretable, − poor evidence, + fair evidence, ++ moderate evidence, +++ good evidence. | |||||
| PDQ-39 | +++/+++ | +++/+++ | ++/+++ | +++/+++ | ++/+ |
| PDQL | +++/+++ | 0 | ++/++ | +++/+++ | 0 |
| PIMS | +++/+++ | +++/+++ | ?/− | ?/− | 0 |
| PLQ | +++/+++ | +++/+++ | ++/+++ | +/++ | −/− |