QUADAS risk of bias | diagnostic studies
| Study | Patient selection | Index test | Reference standard | Flow and timing |
| O’Dochartaigh et al69 | High | Unclear | High | Unclear |
| Yates and Baylous70 | High | Low | High | Unclear |
| Kirkpatrick et al68 | High | High | Low | High |
QUADAS, Quality Assessment of Diagnostic Accuracy Studies.