Table 1 Summary of qualified studies
Study | Year | Source of Patient | Stage | No | Frequency | Method |
|---|---|---|---|---|---|---|
Lee Y, et al. | 2013 | Korea | I | 214 | 23.83% (51/214) | IHC |
Lee HJ, et al. | 2013 | Korea | I–III | 153 | 54.25% (83/153) | PCR, FISH |
Park EA, et al. | 2009 | Korea | I–IV | 132 | 40.15% (53/132) | FISH |
Glynn C, et al. | 2010 | U.S.A | UN | 64 | 32.81% (21/64) | PCR |
Aoki T, et al. | 2012 | Japan | UN | 25 | 40.00% (10/25) | PCR, IHC |
Yano M, et al. | 2006 | Japan | I–III | 80 | 47.50% (38/80) | PCR |
Yoshida Y, et al. | 2007 | Japan | I | 23 | 73.91% (17/23) | PCR |
Hsu KH, et al. | 2011 | Taiwan | I | 162 | 64.20% (104/162) | PCR |
Sugano M, et al. | 2011 | Japan | I–III | 136 | 41.18% (56/136) | PCR |
Onn A, et al. | 2005 | U.S.A | I | 72 | 66.67% (48/72) | IHC |
Usuda K, et al. | 2014 | Japan | I–IV | 148 | 39.19% (58/148) | PCR |
Yang Y, et al. | 2015 | China | 0–IV | 788 | 60.91% (480/788) | PCR |
Hsu JS, et al. | 2014 | Taiwan | III–IV | 149 | 52.35% (78/149) | PCR |