From: Characteristics of lumbar scoliosis in patients with rheumatoid arthritis
 | Value |
---|---|
Age, years (average ± SD) | 54 ~ 84 (70.16 ± 9.14) |
Sex | Â |
 Female | 22 |
 Male | 4 |
Disease duration, years (average ± SD) | 4 ~ 46 (21.8 ± 10.3) |
Steibrocker's classification | Â |
 Stage 2 | 2 |
 Stage 3 | 6 |
 Stage 4 | 18 |
 Class 1 | 3 |
 Class 2 | 18 |
 Class 3 | 4 |
 Class 4 | 1 |