Table 3.
GRADE approach
| Study identifier | Type of Study | Factor of downgrade | Factor of escalation | Level of evidence | ||||
|---|---|---|---|---|---|---|---|---|
| Risk of bias | inconsistency | indirectness | imprecision | Publication bias | ||||
| Mehri Jamilian, et al. [25] | RCT | 0 | -1 | 0 | 0 | 0 | None | Medium |
| M. Razavi, et al. [26] | RCT | -1 | 0 | 0 | -1 | 0 | None | Low |
| Fatemeh Mohammad Hosseinzadeh, et al. [27] | RCT | -1 | 0 | 0 | 0 | 0 | None | Medium |
| Mehri Jamilian, et al. [28] | RCT | -1 | 0 | 0 | 0 | 0 | None | Medium |
| Shahrzad Zadeh Modarres, et al. [29] | RCT | -1 | 0 | 0 | 0 | 0 | None | Medium |
| Zahra Heidar, et al. [30] | RCT | -1 | 0 | 0 | -1 | 0 | None | Low |
| Batool Hossein Rashidi, et al. [31] | RCT | 0 | 0 | 0 | -1 | 0 | None | Medium |
0 Values are mean “not lower the level”, -1 Values are mean “lower one level”