Table 1.
Main characteristics of the studies included in this meta-analysis
| First author | Year | Positive rate | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cancer tissue | Adjacent tissue | Normal tissue | Low differentiation | Highly + moderate | TI + TII | TIII + TIV | Superficial | Deep | No metastasis | Metastasis | Quality | ||
| Yingfeng Zhu | 2007 | 80/96 | 33/80 | – | 56/62 | 24/34 | 21/29 | 59/67 | 10/16 | 70/80 | 23/32 | 57/64 | D |
| Zhifeng Tang | 2010 | 159/189 | 26/54 | 6/32 | 82/100 | 61/89 | 29/46 | 114/143 | – | – | 49/73 | 94/116 | D |
| Yaqin Hao | 2011 | 41/54 | 22/54 | 9/30 | 20/22 | 21/32 | – | – | 4/9 | 17/19 | 5/11 | 16/17 | D |
| Shengxi Wang | 2011 | 92/112 | 28/79 | – | 66/75 | 26/37 | – | – | 15/23 | 77/89 | 29/42 | 63/70 | E |
| Li Jin | 2011 | 78/87 | – | 7/24 | – | – | – | – | – | – | – | – | E |
| Lina Wang | 2011 | 32/60 | 16/60 | 3/20 | 26/42 | 6/18 | – | – | 2/9 | 30/51 | 4/7 | 28/53 | D |
| Wude Zhang | 2012 | 41/48 | 15/48 | – | 32/34 | 9/14 | 23/27 | 18/21 | 22/29 | 19/19 | 24/30 | 7/18 | E |
| Xiaoli Cao | 2013 | 32/45 | 5/20 | – | 24/27 | 8/18 | 11/20 | 21/25 | 9/19 | 23/26 | 10/20 | 22/25 | E |
| Qianjun Li | 2013 | 38/65 | – | 0/65 | – | – | – | – | – | – | – | – | D |
| Limin Liu | 2014 | 57/80 | 24/80 | – | – | – | 6/14 | 51/66 | 6/15 | 51/65 | 11/24 | 46/56 | C |