Table 3.
Ratings for the validity analysis made by two experts in the field (point scale: 1–4) and the corresponding QA-SIVAS scores (point scale: 0–18) for the included 21 studies
| Study | Expert 1 | Expert 2 | Mean | QA-SIVAS score (%) |
|---|---|---|---|---|
| Belcher et al. (2022) [4] | 3 | 3 | 3 | 12 (67) |
| Boden et al. (2000) [5] | 1 | 1 | 1 | 6 (33) |
| Boden et al. (2009) [6] | 2 | 2 | 2 | 9 (50) |
| Brophy et al. (2015) [7] | 2 | 2 | 2 | 11 (61) |
| Cochrane et al. (2007) [10] | 3 | 3 | 3 | 11 (61) |
| De Carli et al. (2022) [12] | 1 | 3 | 2 | 10 (56) |
| Della Villa et al. (2020) [13] | 4 | 4 | 4 | 14 (78) |
| Della Villa et al. (2021) [15] | 4 | 4 | 4 | 14 (78) |
| Grassi et al. (2017) [19] | 3 | 3 | 3 | 11 (61) |
| Grassi et al. (2020) [20] | 3 | 3 | 3 | 11 (61) |
| Johnston et al. (2018) [28] | 3 | 3 | 3 | 12 (67) |
| Koga et al. (2010) [30] | 3 | 4 | 3.5 | 12 (67) |
| Koga et al. (2017) [29] | 4 | 4 | 4 | 11 (61) |
| Krosshaug et al. (2007) [31] | 3 | 3 | 3 | 13 (72) |
| Lucarno et al. (2021) [32] | 4 | 4 | 4 | 14 (78) |
| Montgomery et al. (2018) [36] | 4 | 4 | 4 | 14 (78) |
| Olsen et al. (2004) [38] | 4 | 4 | 4 | 13 (72) |
| Rolley et al. (2023) [40] | 3 | 3 | 3 | 10 (56) |
| Sheehan et al. (2012) [44] | 2 | 3 | 2.5 | 10 (56) |
| Stuelcken et al. (2016) [45] | 3 | 3 | 3 | 13 (72) |
| Waldén et al. (2015) [46] | 4 | 4 | 4 | 15 (83) |