Table 1 Bias risk assessment of the studies by NIH QA Tool for systematic reviews and meta-analysis
First Autor (# of Ref) | *Question | Rating by reviewers | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | # Reviewer1 | # Reviewer2 | |
Aberg, J. A. [30] | Yes | Yes | NA | NA | NA | Yes | NA | NA | Poor** | Poor** |
Agegnehu, C. D. [31] | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Good | Good |
Almeida-Brasil, C. C. [32] | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Good | Good |
Anderson, K. [33] | Yes | Yes | Yes | NA | NA | Yes | NA | NA | Fair | Fair |
Bernabé, K. J. [34] | Yes | Yes | Yes | Yes | No | Yes | No | No | Good | Good |
Bertagnolio, S.[35] | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Good | Good |
Bezabhe, W. M. [36] | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Good | Good |
Blanco, J. L. [37] | Yes | Yes | NA | NA | NA | Yes | NA | NA | Poor** | Poor** |
Borges Á, H. [38] | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Good | Good |
Cevik, M. [39] | Yes | Yes | NA | NA | NA | Yes | NA | NA | Poor** | Poor** |
Cruciani, M. [40] | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Good | Good |
Cruz, M. L. [41] | Yes | Yes | Yes | NA | NA | Yes | NA | NA | Fair | Fair |
Daltro, A. C. B. [42] | Yes | Yes | Yes | Yes | CD | Yes | No | NA | Fair | Fair |
de Waal, R. [43] | Yes | Yes | NA | NA | NA | NA | NA | NA | Poor** | Poor** |
Diallo, M. [44] | Yes | Yes | Yes | Yes | CD | Yes | No | NA | Fair | Fair |
Edessa, D. [45] | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Good | Good |
Feng, Q. [46] | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Good | Good |
Grau, S. [47] | Yes | Yes | Yes | No | Yes | No | NA | NA | Fair | Fair |
Guo, C. [48] | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Good | Good |
Gupta, R. K. [49] | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Good | Good |
Hauser, A. [50] | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Good | Good |
Huang, Y. [51] | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Good | Good |
Kabbara, W. K. [52] | Yes | NA | Yes | NA | NA | Yes | NA | NA | Poor** | Poor** |
Kandel, C. E. [53] | Yes | NA | NA | NA | NA | NA | NA | NA | Poor** | Poor** |
Karade, S. [54] | Yes | Yes | Yes | Yes | Yes | Yes | NA | NA | Fair | Fair |
Kefale, A. T. [55] | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Good | Good |
Llibre, J. M. [56] | Yes | Yes | Yes | Yes | Yes | Yes | NA | NA | Fair | Fair |
Mbuagbaw, L. [57] | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Good | Good |
Mbunkah, H. A. [58] | Yes | Yes | Yes | NA | Yes | Yes | NA | NA | Fair | Fair |
McCluskey, S. M. [59] | Yes | NA | NA | NA | NA | NA | NA | NA | Poor** | Poor** |
Muheem, A. [60] | Yes | Yes | Yes | CD | No | Yes | NA | NA | Fair | Fair |
Nozza, S. [61] | Yes | NA | NA | NA | NA | Yes | NA | NA | Poor** | Poor** |
Patel, R. [62] | Yes | Yes | Yes | Yes | No | Yes | NA | NA | Fair | Fair |
Ssemwanga, D. [63] | Yes | CD | Yes | Yes | NA | Yes | NA | NA | Fair | Fair |
Stella-Ascariz, N. [64] | Yes | CD | Yes | Yes | NA | Yes | NA | NA | Fair | Fair |
Temereanca, A. [65] | Yes | NA | NA | Yes | NA | NA | NA | NA | Poor** | Poor** |
Vannappagari, V. [66] | Yes | Yes | Yes | Yes | Yes | Yes | NA | NA | Fair | Fair |
Wallis, C. L. [67] | Yes | NA | NA | NA | NA | NA | NA | NA | Poor** | Poor** |
Xing, H. [68] | Yes | NA | NA | NA | NA | NA | NA | NA | Poor** | Poor** |
Zuo, L. [69] | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Good | Good |