Table 3.
Assessment of studies regarding diagnostic performance of NBI by using the QUADAS-2 tool.
| Study | Risk of bias | Applicability concerns | |||||
|---|---|---|---|---|---|---|---|
| Patient selection | Index test | Reference standard | Flow and timing | Patient selection | Index test | Reference standard | |
| Shih-Wei Yang, 2012 (15) | Unclear | Low | Low | High | Low | Low | Low |
| Shih-Wei Yang, 2012 (27) | Unclear | Low | Low | High | Low | Low | Low |
| Shih-Wei Yang, 2012 (28) | Unclear | Low | Low | High | Low | Low | Low |
| T. Shibahara, 2013 (31) | Unclear | Unclear | Low | Low | Low | Unclear | Low |
| Shih-Wei Yang, 2014 (29) | Unclear | Low | Low | High | Low | Unclear | Low |
| Shih-Wei Yang, 2015 (30) | Unclear | Low | Low | High | Low | Low | Low |
| AN Vu, 2015 (21) | High | Low | Low | High | Low | Low | Low |
| Giulia Ottaviani, 2016 (26) | High | Low | Low | Low | High | Low | Low |
| Aparaajita Upadhyay, 2019 (19) | High | Low | Low | Unclear | High | Low | Low |
| Agostino Guida, 2019 (22) | Unclear | High | Low | Low | Low | Low | Low |
| Alberto Deganello, 2020 (23) | Low | High | Low | High | Low | Unclear | Low |