Table 3 Methodological quality assessment of included studies
Studies | Item 1 | Item 2 | Item 3 | Item 4 | Item 5 | Item 6 | Item 7 | Item 8 | Item 9 | |
|---|---|---|---|---|---|---|---|---|---|---|
1 | Spitaels D, 2019, Belgium [29] | High | Unclear | Low | High | Low | Unclear | Unclear | Low | Unclear |
2 | Presseau J, 2018, England [30] | Low | Low | Low | Low | Low | Low | Low | Low | High |
3 | Pinto D, 2018, Portugal [31] | Low | Low | Low | Low | Low | High | High | Low | High |
4 | Wang H-YJ, 2018, USA [32] | Unclear | Unclear | Low | Low | Low | Unclear | Unclear | Low | Unclear |
5 | Trietsch J, 2017, Netherlands [36] | Low | Low | Low | Low | Low | Low | High | Low | Unclear |
6 | van der Velden AW, 2017, Netherlands [33] | Unclear | High | Low | Low | Unclear | Unclear | Unclear | Low | Unclear |
7 | Noto H, 2016, Japan [34] | Unclear | Unclear | Low | High | Unclear | Low | Low | Low | High |
8 | Gerber JS, 2014, USA [23] | Unclear | Unclear | Unclear | Unclear | Unclear | Unclear | Unclear | Unclear | Unclear |
9 | Martín-Madrazo C, 2012, Spain [35] | Unclear | Unclear | Low | Low | Unclear | Unclear | Unclear | Low | Unclear |
10 | Enriquez-Puga A, 2009, England [22] | Low | Unclear | Low | Low | Unclear | Low | Unclear | Low | Unclear |
11 | Cates CJ 2009, England [21] | High | High | High | High | Unclear | Unclear | Unclear | Low | Unclear |