Table 3 Quality assessment scores on the items of reporting and internal validity
| Â | Reporting | Internal validity | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Â | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 27 | Total reporting (max. 12) | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | Total Internal validity (max. 13) |
Taddei et al. [39] | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 1 | 1 | 0 | 10 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 12 |
Okamura et al. [40] | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 1 | 1 | 1 | 11 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 11 |
Lynn et al. [54] | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 1 | 0 | 0 | 9 | 0 | 0 | 1 | 1 | 1 | 0a | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 9 |
Lee and Choi [55] | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 0 | 6 | 0 | 0 | 1 | 1 | 1 | 0a | 1 | 1 | 1 | 1 | 0 | 0a | 0a | 7 |
Mulligan et al. [57] | 1 | 1 | 1 | 1 | 0b | 1 | 1 | 0 | 1 | 1 | 0 | 8 | 0 | 0b | 1 | 0b | 1 | 1 | 1 | 0b | 0b | 0b | 0b | 0b | 1 | 5 |
Tudpor et al. [56] | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 6 | 0 | 0 | 1 | 1 | 1 | 0a | 0a | 1 | 0 | 0b | 0b | 0a | 0 | 4 |
Lee et al. [58] | 0 | 1 | 0 | 0 | 0b | 1 | 1 | 0 | 1 | 1 | 1 | 6 | 0 | 0b | 1 | 0b | 1 | 0a | 1 | 0b | 0b | 0b | 0b | 0b | 1 | 4 |
Ma et al. [62] | 1 | 1 | 1 | 1 | 0b | 0 | 1 | 1 | 1 | 1 | 1 | 9 | 0 | 0b | 1 | 0b | 1 | 0a | 1 | 0b | 0b | 0b | 0b | 0b | 1 | 4 |
Matsumoto et al. [59] | 0 | 1 | 1 | 0 | 0b | 1 | 1 | 0 | 0 | 1 | 0 | 5 | 0 | 0b | 1 | 0b | 1 | 0a | 1 | 0b | 0b | 0b | 0b | 0b | 0a | 3 |
Kim et al. [60] | 0 | 1 | 1 | 0 | 0b | 0 | 1 | 0 | 0 | 0 | 0 | 3 | 0 | 0b | 1 | 0b | 1 | 0a | 1 | 0b | 0b | 0b | 0b | 0b | 0a | 3 |
Pisal et al. [61] | 0 | 0 | 0 | 0 | 0b | 1 | 1 | 0 | 0 | 1 | 1 | 4 | 0 | 0b | 1 | 0b | 0a | 0a | 1 | 0b | 0b | 0b | 0b | 0b | 0a | 2 |