Table 9.
Study design characteristics of the included data sets
| Study | Scores | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wada et al. [35] | Lee et al. [29] | Edwards et al. [34] | Bapat et al. [30] | Yonenobu et al. [37] | Goto and Gita [36] | Tani et al. [33] | Jain et al. [32] | Iwasaki et al. [31] | Kristof et al. [28] | N | ? | Y | |
| Question | |||||||||||||
| Question (1) | N | N | N | N | N | N | N | N | N | N | 10 | 0 | 0 |
| Question (2) | ? | ? | ? | ? | ? | ? | ? | ? | ? | ? | 0 | 10 | 0 |
| Question (3) | N | N | N | N | N | N | N | N | N | N | 10 | 0 | 0 |
| Question (4) | Y | Y | Y | ? | Y | ? | Y | Y | Y | Y | 0 | 2 | 8 |
| Question (5) | N | N | N | N | N | N | N | N | N | N | 10 | 0 | 0 |
| Question (6) | N | N | N | N | N | N | N | N | N | N | 10 | 0 | 0 |
| Question (7) | Y | Y | Y | ? | Y | ? | Y | Y | Y | ? | 0 | 4 | 7 |
| Question (8) | Y | ? | Y | Y | Y | ? | Y | ? | Y | ? | 0 | 4 | 6 |
| Question (9) | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | 0 | 0 | 10 |
| Question (10) | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | 0 | 0 | 10 |
| Question (11) | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | 0 | 0 | 10 |
Questions 1–11 was the 11 questions in the methodological quality assessment scheme [21]
Data were the responses to these questions for each article and the number of response “N”, “?”, “Y” for each question