Appendix 1.
Reasons for excluding studies after full-text screening
| Study reference | Reason |
|---|---|
| [32] | Not radiographic diagnosis |
| [8] | Review article with no new data |
| [12] | Review article with no new data |
| [6] | Review article with no new data |
| [24] | Not related to primary hip OA |
| [52] | Not related to primary hip OA |
| [45] | Review article with no new data |
| [53] | Review article with no new data |
| [17] | Results not reported as prevalence |
| [16] | Results not reported as prevalence |
| [25] | Not radiographic diagnosis |
| [4] | Review article with no new data |
OA = osteoarthritis.