Table 2.
Quality assessment of the studies according to QUADAS-2
| Reference | Risk of bias |
Feasibility |
||||||
|---|---|---|---|---|---|---|---|---|
| Patient selection | Study test | Reference standard | Timing | Patient selection | Study test | Reference standard | Timing | |
| Park et al. [15] | Unclear | LR | LR | LR | Unclear | LR | LR | LR |
| Na et al. [16] | LR | LR | LR | LR | LR | LR | LR | LR |
| Nasrollah et al. [17] | LR | HR | LR | Unclear | LR | Unclear | LR | Unclear |
| Choi et al. [18] | LR | LR | LR | LR | LR | LR | LR | LR |
| Na et al. [19] | LR | LR | LR | LR | LR | LR | LR | LR |
| Trimboli et al. [20] | LR | LR | LR | LR | LR | LR | LR | LR |
| Han et al. [21] | HR | HR | LR | LR | HR | HR | LR | LR |
LR, low risk; HR, high risk.