Table 2. Jadad score assessment of RCTs and Newcastle-Ottawa Quality Assessment Scale of NRS.
| Jadad score | ||||||||
|---|---|---|---|---|---|---|---|---|
| Author, year | Randomization | Blinding | Withdrawals and dropouts | |||||
| Appropriate method mentioned | Appropriate method mentioned | |||||||
| Rudas et al., 2014 | ★ | ★ | ★ | ☆ | ★ | |||
| Yavuz et al., 2014 | ★ | ☆ | ☆ | ☆ | ★ | |||
| Kupeli I, 2017 | ★ | ☆ | ☆ | ☆ | ★ | |||
| Newcastle-Ottawa Quality Assessment Scale | ||||||||
| Author, year | Adequate case definition | Representativeness of the cases | Selection of controls | Definition of controls | Comparability of cases and controls | Assessment of outcome | Follow-up long enough | Adequate follow up of controls |
| Dinh et al., 2014 | ★ | ★ | ★ | ★ | ★☆ | ★ | ★ | ★ |
★ indicates fulfilment of the criteria; ☆ indicates no fulfilment of the criteria