Table 1.
Demographics and clinical features
| Clinical Feature | RA (n=27) | SLE (n=26) | CU (n=27) | P valuea |
|---|---|---|---|---|
| Age, mean (SD), y | 52.4 (13.3) | 36.7 (11.0) | 39.2 (10.7) | <.001 |
| Female, No. (%) | 22 (81) | 19 (73) | 23 (85) | .54 |
| Race, No. (%) | .15 | |||
| White | 22 (81) | 18 (69) | 17 (63) | |
| Black | 4 (15) | 8 (31) | 6 (22) | |
| Other | 1 (4) | 0 (0) | 4 (15) | |
| Disease activity | ||||
| Median (IQR) | 3 (2–4) | 1 (0–1) | 0 (0–3) | |
| Score, mild to severe | 0–10 | 0–3 | 0–3 | |
| Duration of hives, median (IQR), mo | 12 (6–60) | |||
Abbreviations: CU, chronic idiopathic urticaria; IQR, interquartile range; RA, rheumatoid arthritis; SLE, systemic lupus erythematosus.
a
P values are based on Fisher exact test where the overall P value (.01) was significant at the .05 level. Thus, the individual comparisons are tested against an α = .0167 (Bonferroni correction for 3 comparisons) for statistical significance to conserve the overall type I error rate at 0.05.