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Quality of articles using the QUADAS tool
| Study | Risk of bias | Applicability Concerns | |||||
|---|---|---|---|---|---|---|---|
| Patient selection | Index test | Reference standard | Flow and timing | Patient selection | Index test | Reference standard | |
| Guo etal [27] (2008) | L | L | L | L | L | L | L |
| Zhen etal [29] (2014) | L | L | L | L | L | L | L |
| Rapat etal [20] (2013) | H | L | L | L | H | L | L |
| Lim etal [19] (2013) | L | L | L | L | L | L | L |
L low risk; H high risk; U nuclear risk
