Table 1.
Quality in Prognosis Studies Analysis of Internal Validity
| Prognostic | Statistical | |||||
|---|---|---|---|---|---|---|
| Study | Study | Factor | Outcome | Study | Analysis | |
| Participation | Attrition | Measuring | Measuring | Confounding | and Reporting | |
| Arı 2012 | Low | Medium | Low | Low | Low | Low |
| Guo 10 | Low | Medium | Low | Medium | Low | Low |
| Lorgis 11 | Low | Low | Low | Low | Low | Low |
| Yıldırım 2013 | Low | Low | Low | Low | Medium | Medium |
| Bekler 12 | Low | Medium | Low | Low | Low | Low |
| Akgul 2014 | Low | Medium | Low | Low | Low | Low |
| Sheng 13 | Low | Low | Medium | Low | Medium | Medium |
| Stavileci 14 | Low | Low | Low | Low | Low | Low |
| Tanrıverdi 18 | Low | Low | Low | Medium | Medium | Medium |
| Bozbeyoğlu 17 | Low | Low | Low | Low | Low | Low |