Pain relief at 2 weeks median | Pain relief at 2 weeks confidence limits | p Value | ||
Diagnosis | ||||
RA | n=15 | 6.2 | −4.4 to 13.5 | p=0.9 NS |
OA | n=27 | 6.6 | 1.3 to 11.8 | |
AS | n=3 | 5.7 | NA | |
Pattern of bone response | ||||
Atrophic | n=13 | 0.9 | −3.3 to 6.7 | p=0.04* |
Mixed | n=18 | 7.5 | 4.8 to 14.3 | |
Hypertrophic | n=14 | 7.6 | 3.4 to 12.0 | |
Radiographic severity (minimum joint space width) | ||||
0–1 mm | n=24 | 6.2 | −2.9 to 8.2 | p=0.77 NS |
2–3 mm | n=9 | 6.0 | 0.2 to 14.3 | |
4–5 mm | n=12 | 10.3 | −9.3 to 25.7 | |
Direction of migration of femoral head | ||||
Superior | n=22 | 6.9 | 5.1 to 12.0 | p=0.37 NS |
Medial/axial | n=19 | 3.3 | −3.3 to 11.3 |
The values are median relief of total pain at 2 weeks (confidence limits of median): a positive figure indicates reduction of pain, and a negative figure indicates an increase in pain relative to baseline. Data were analysed for differences between groups by Kruskal-Wallis or Mann-Whitney tests for non-parametric groups (NS = not significant).