Table 2.
Unadjusted prevalence of clinical OA indicators in HBM cases and controls
| n (550) | HBM cases, n (%) | Controls, n (%) | χ2 P value | |
|---|---|---|---|---|
| Joint pain | 536 | |||
| Ever, any site | 299 (86.9) | 151 (78.7) | 0.012 | |
| For months or years, still ongoing | 206 (59.9) | 103 (53.7) | 0.161 | |
| NSAID use (current) | 549 | 58 (16.5) | 13 (6.6) | 0.001 |
| Knee crepitus | ||||
| Moderate/severe | 408 | 155 (59.2) | 57 (39.0) | <0.001 |
| Excluding knee replacements | 388 | 143 (58.1) | 55 (38.7) | <0.001 |
| Joint replacement | 550 | |||
| Any jointa | 46 (13.0) | 8 (4.1) | 0.001 | |
| Hip | 22 (6.2) | 2 (1.0) | 0.004 | |
| Knee | 24 (6.8) | 7 (3.6) | 0.114 |
Frequencies and percentages (value in parentheses) are shown. aMostly hip and/or knee replacement except great toe joint replacement (n = 1), bilateral ankle replacement (n = 1) and patella resurfacing (n = 1).