Contribution of HLA-B27 in acute salmonella arthritis
| HLA-B27+ (n=43) | HLA-B27− (n=6) | p Value | |
| Sex (M/F) | 28/15 | 5/1 | 0.0349† |
| Previous arthritis | 73-150 | 0 | NS |
| Previous iritis | 4 | 0 | NS |
| Age, years, mean (range) | 34.2 (18–76) | 38.2 (21–52) | NS |
| Number of joints, median (range) | 4.0 (1–8) | 4.0 (0–7) | NS |
| Low back pain | 24 | 1 | NS |
| Urethritis | 16 | 0 | NS |
| Acute iritis | 8 | 0 | NS |
| Radiological sacroiliitis‡ | 2 | 0 | NS |
| ESR, mm 1st h, mean (SD) | 80.9 (32.6) | 46.5 (27.7) | 0.0180 |
| Duration of acute arthritis§ months, median (range) | 3.0 (1–144) | 2.0 (0.5–5) | NS |
↵3-150 Numbers of patients, † Fisher’s exact test, ‡ grade II–IV, § evaluable in 46 patients.