Table 4. – Study-level quality assessment using the Quality in Prognosis Studies tool.
| Study | Study participation | Study attrition | Prognostic factor measurement | Outcome measurement | Study confounding | Statistical analysis and reporting |
|---|---|---|---|---|---|---|
| Gargani 201525 | L | L | L | L | H | L |
| Coiro 201526 | L | M | L | L | H | L |
| Gustafsson 201527 | L | L | L | L | L | L |
| Cogliati 201628 | L | L | L | L | H | L |
| Platz 201629 | L | L | L | L | L | L |
| Villanueva 201630 | L | L | M | L | H | L |
| Coiro 201631 | L | M | L | L | L | L |
| Miglioranza 201732 | L | L | L | L | L | L |
| Pellicori 201833 | L | L | L | L | L | L |
.L: low; M: moderate; H: high