Table 3.
Risk of bias evaluation of included literature.
| Study ID | Random sequence generation (selection bias) | Allocation concealment (selection bias) | Blinding of participants and personnel (performance bias) | Blinding of outcome assessment (detection bias) | Incomplete outcome data (attrition bias) | Selective reporting (reporting bias) | Other bias |
|---|---|---|---|---|---|---|---|
| Acute pelvic inflammatory | |||||||
| CCJ (2018) [27] | U | U | U | U | L | L | U |
| YML (2013) [28] | U | U | U | U | L | L | U |
| ZJ (2017) [29] | L | U | U | U | L | L | U |
| DY (2014) [30] | U | U | U | U | L | L | U |
| SL (2015) [31] | U | U | U | U | L | L | U |
| TSQ (2019) [32] | U | U | U | U | L | L | U |
| XQX (2014) [33] | U | U | U | U | L | H | U |
| YFY (2013) [34] | U | U | U | U | L | L | U |
| RS (2012) [35] | U | U | U | U | L | L | U |
| SFM (2015) [36] | U | U | U | U | L | L | U |
| ZY (2013) [37] | U | U | U | U | L | L | U |
| FXH (2018) [38] | L | U | U | U | L | L | U |
| SYQ (2015) [39] | U | U | U | U | L | L | U |
| ZHY (2012) [40] | U | U | U | U | L | L | U |
| ZYZ (2012) [41] | U | U | U | U | L | L | U |
| YCQ (2017) [42] | U | U | U | U | L | L | U |
| LWR (2013) [43] | U | U | U | U | L | L | U |
| WGJ (2011) [44] | U | U | U | U | L | L | U |
| HRM (2013) [45] | U | U | U | U | L | L | U |
| GSY (2012) [46] | U | U | U | U | L | L | U |
| ZYH (2016) [47] | U | U | U | U | L | L | U |
| ZNN (2012) [48] | U | U | U | U | L | L | U |
| LJ (2014) [49] | U | U | U | U | L | L | U |
|
| |||||||
| Chronic pelvic inflammatory | |||||||
| LJX2 (2014) [50] | U | U | U | U | L | L | U |
| XZJ (2007) [51] | H | U | U | U | L | L | U |
| CXC (2019) [52] | U | U | U | U | L | L | U |
| DJL (2014) [53] | U | U | U | U | L | L | U |
| PGZ (2016) [54] | H | U | U | U | L | L | U |
| SXL (2015) [55] | L | U | U | U | L | L | U |
| WQF (2013) [56] | U | U | U | U | L | L | U |
| ZXJ (2015) [57] | L | U | U | U | L | L | U |
| ZMY (2017) [58] | U | U | U | U | L | L | U |
| LJX1 (2014) [50] | U | U | U | U | L | L | U |
| LXX (2019) [59] | L | U | U | U | L | L | U |
| LH (2019) [60] | U | U | U | U | L | L | U |
| PJQ (2019) [61] | U | U | U | U | L | L | U |
| SWA (2014) [62] | U | U | U | U | L | L | U |
| SQB2 (2012) [63] | U | U | U | U | L | L | U |
| ZY (2014) [64] | U | U | U | U | L | L | U |
| SQB1 (2012) [63] | U | U | U | U | L | L | U |
| SPF (2015) [65] | U | U | U | U | L | L | U |
| CF (2018) [66] | U | U | U | U | L | L | U |
| DLL (2017) [67] | U | U | U | U | L | L | U |
| FJY (2010) [68] | U | U | U | U | L | L | U |
| FP (2013) [69] | U | U | U | U | L | L | U |
| KY (2018) [70] | U | U | U | U | L | L | U |
| LMY (2016) [71] | U | U | U | U | L | L | U |
| LYK (2016) [72] | U | U | U | U | L | L | U |
| LongH (2011) [73] | U | U | U | U | L | L | U |
| RDQ (2019) [74] | U | U | U | U | L | L | U |
| ShaoXL (2012) [75] | U | U | U | U | L | L | U |
| TXG (2015) [76] | U | U | U | U | L | L | U |
| WJP (2013) [77] | U | U | U | U | H | L | U |
| YM (2017) [78] | U | U | U | U | L | L | U |
| YQ (2014) [79] | U | U | U | U | L | L | U |
| ZYL (2017) [80] | L | U | U | U | L | L | U |
| DLH (2019) [81] | H | U | U | U | L | L | U |
| HJY (2019) [82] | L | U | U | U | L | L | U |
| LJ (2019) [83] | U | L | L | U | L | L | U |
| SJL (2016) [84] | U | U | U | U | L | L | U |
| WJ (2018) [85] | L | U | U | U | L | L | U |
| ZL (2015) [86] | U | U | U | U | L | L | U |
| ZT (2018) [87] | U | U | U | U | L | L | U |
| ZhaoJ (2017) [88] | U | U | U | U | L | L | U |
| ZengJ (2016) [89] | U | U | U | U | L | L | U |
| CXF (2018) [90] | U | U | U | U | L | L | U |
| DCM (2016) [91] | U | U | U | U | L | L | U |
| DQY (2015) [92] | U | U | U | U | L | L | U |
| HSX (2019) [93] | H | U | U | U | L | L | U |
| HHJ (2019) [94] | L | U | U | U | L | L | U |
| HHM (2019) [95] | L | U | U | U | L | L | U |
| HYL (2015) [96] | L | U | U | U | L | L | U |
| LML (2019) [97] | U | U | U | U | L | L | U |
| LHR (2013) [98] | U | U | U | U | L | L | U |
| LXL (2018) [99] | L | U | U | U | L | L | U |
| LSY (2018) [100] | L | U | U | U | L | L | U |
| LYZ (2012) [101] | H | U | U | U | L | L | U |
| MYQ (2019) [102] | U | U | U | U | L | L | U |
| RC (2016) [103] | U | U | U | U | L | L | U |
| RL (2017) [104] | L | U | U | U | L | L | U |
| SNY·HSY (2016) [105] | U | U | U | U | L | L | U |
| SQJ (2012) [106] | U | U | U | U | L | L | U |
| YLH (2012) [107] | U | U | U | U | L | L | U |
| WDD (2017) [108] | L | U | U | U | L | L | U |
| WHL (2011) [109] | U | U | U | U | L | L | U |
| WLY (2019) [110] | U | U | U | U | L | L | U |
| WSY (2011) [111] | U | U | U | U | L | L | U |
| WY (2018) [112] | L | U | U | U | L | L | U |
| WDM (2019) [113] | U | U | U | U | L | L | U |
| XW (2015) [114] | U | U | U | U | L | L | U |
| XRQ (2018) [115] | U | U | U | U | L | L | U |
| YDM (2015) [116] | U | U | U | U | L | L | U |
| YXH (2016) [117] | L | U | U | U | L | L | U |
| ZhangJ (2017) [118] | U | U | U | U | L | L | U |
|
| |||||||
| Endometritis | |||||||
| SFF (2017) [119] | U | U | U | U | L | L | U |
| SCP (2019) [120] | U | U | U | U | L | L | U |
| DYY (2019) [121] | U | U | U | U | L | L | U |
| LY (2019) [122] | U | U | U | U | L | L | U |
| HHF (2017) [123] | L | U | U | U | L | L | U |
| WJF (2019) [124] | U | U | U | U | L | L | U |
| MTX (2016) [125] | U | U | U | U | L | L | U |
| SXW (2018) [126] | L | U | U | U | L | L | U |
| ZHH (2018) [127] | L | U | U | U | L | L | U |
| ZL (2019) [128] | L | U | U | U | L | L | U |
| DCL (2017) [129] | U | U | U | U | L | L | U |
| DFY (2017) [130] | L | U | U | U | L | L | U |
| GY(2015) [131] | L | U | U | U | L | L | U |
| LWP (2019) [132] | L | U | U | U | L | L | U |
| MYJ (2018) [133] | L | U | U | U | L | L | U |
| DFL (2017) [134] | U | U | U | U | L | L | U |
| HXY (2018) [135] | U | U | U | U | L | L | U |
| ZQ (2019) [136] | U | U | U | U | L | L | U |
| LXZ (2017) [137] | U | U | U | U | L | L | U |
| CXH (2017) [138] | L | U | U | U | L | L | U |
| FCF (2016) [139] | U | U | U | U | L | L | U |
| LBY (2019) [140] | U | U | U | U | L | L | U |
| LSQ (2017) [141] | L | U | U | U | L | L | U |
| YL (2018) [142] | U | U | U | U | L | L | U |
| ZQ (2016) [143] | U | U | U | U | L | L | U |
| ZCY (2018) [144] | U | U | U | U | L | L | U |
| ZGB (2017) [145] | U | U | U | U | L | L | U |
| GLJNT (2017) [146] | U | U | U | U | L | L | U |
| CJH (2016) [147] | U | U | U | U | L | L | U |
| AYGL (2018) [148] | L | U | U | U | L | L | U |
| SXX (2018) [149] | U | U | U | U | L | L | U |
| XCY (2015) [150] | L | U | U | U | L | L | U |
| HF (2016) [151] | L | U | U | U | L | L | U |
L, low risk; U, unclear risk; H, high risk.