Table 1.
Characteristics of patients, by specific diagnosis
| AS (n = 46) | Ps-SpA (n = 51) | uSpA (n = 43) | P | Total (n = 140) | |
|---|---|---|---|---|---|
| Men, n (%) | 33 (72) | 31 (61) | 25 (58) | 0.36 | 89 (64) |
| Age, yrs | 39.5 ± 12.7 | 49.3 ± 13.6* | 37.8 ± 11.4* | <0.001 | 42.6 ± 13.6 |
| Age at diagnosis, yrs | 38.9 ± 12.7 | 48.5 ± 13.6* | 36.9 ± 11.4** | <0.001 | 41.8 ± 13.6 |
| Age at onseta, yrs | 38.1 ± 12.8 | 48.1 ± 13.6* | 36.3 ± 11.5** | <0.001 | 41.2 ± 13.7 |
| Time of evolutiona, yrs | 1.5 ± 0.6 | 1.2 ± 0.7 | 1.5 ± 0.7 | 0.20 | 1.4 ± 0.7 |
| HLA-B27 positive, n (%) | 33/40 (82) | 8/35 (23)* | 25/38 (66)** | <0.001 | 66/113 (58) |
| Disease durationb, yrs | 0.7 ± 0.7 | 0.9 ± 0.7 | 0.9 ± 0.7 | 0.30 | 0.8 ± 0.7 |
| Diagnosis delay, yrs | 0.8 ± 0.6 | 0.4 ± 0.6* | 0.6 ± 0.7 | 0.005 | 0.6 ± 0.6 |
Results are expressed as a mean ± s.d. unless otherwise specified. Significance was obtained using the chi-square test for qualitative variables and analysis of variance for quantitative variables (Tukey as post hoc test). aFrom the first signs/symptoms attributable to the disease. bFrom the date of the diagnosis. *Significant differences (P < 0.05) vs AS. **Significant differences (P < 0.05) vs Ps-SpA.