Association between radiographic features (joint space narrowing, osteophytes, subchondral sclerosis, subchondral cysts, erosions, malalignment) and interphalangeal osteoarthritis, as determined by histopathology
| X-ray feature | DIP, p value | DIP, Pearson r | PIP, p value | PIP, Pearson r |
|---|---|---|---|---|
| Joint space narrowing | <0.0001 | 0.8297 | 0.0001 | 0.7874 |
| Osteophyte | <0.0001 | 0.8618 | 0.0024 | 0.7140 |
| Subchondral sclerosis | 0.0136 | 0.6313 | 0.0004 | 0.5994 |
| Subchondral cyst | 0.0757 | 0.3053 | 0.0621 | 0.3725 |
| Erosion | 0.2947 | 0.2272 | 0.2731 | 0.5842 |
| Malalignment | >0.999 | 0.1993 | >0.999 | 0.3122 |
Significance of the association was analysed by a 2×2 Fisher's exact test; effect sizes are provided as Pearson r.
DIP, distal interphalangeal; PIP, proximal interphalangeal.