Table 2 Quality assessment scores for the studies included in this meta-analysis
First Author (year) | Selection | Comparability | Exposure | Total Points |
|---|---|---|---|---|
Enmin Huang 2012 [9] | **** | * | *** | 8 |
Lang Feifei 2017 [10] | *** | * | *** | 7 |
Xiaoqing Yin 2018 [6] | **** | ** | *** | 9 |
ZHOU Zhongwei 2013 [11] | *** | * | *** | 7 |
Pan 2011 [12] | *** | ** | *** | 8 |
Mi 2014 [13] | *** | ** | *** | 8 |
Sun 2015 (I) (II) [14] | **** | * | *** | 8 |
Gurramkond 2015 [5] | *** | ** | *** | 8 |
Reiter 2015 [15] | *** | * | *** | 7 |
Clarissa Fontoura 2012 [16] | *** | * | *** | 7 |
Kerstin U.Ludwig 2014 [8] | **** | – | *** | 7 |
Do Rego Borges 2015 [7] | **** | – | *** | 7 |
Butali 2011 [17] | *** | * | *** | 7 |