Demographics and clinical characteristics of 112 Black and 71 non-Black patients with DLE
| Demographics and clinical characteristics | Black patients (n=112) | Non-Black patients* (n=71) | P value |
| Age at initial visit (years), median (IQR) | 50.0 (39.2–56.9) | 46.0 (35.5–54.3) | 0.041† |
| Age at diagnosis (years), median (IQR) | 40.0 (30.0–49.0) | 36.0 (27.0–47.0) | 0.266† |
| Gender, n (%) | 0.716‡ | ||
| Male | 18 (16) | 10 (14) | |
| Female | 94 (84) | 61 (86) | |
| Disease duration at initial visit (years), median (IQR) | 4.4 (0.9–12.4) | 3.5 (1.0–10.2) | 0.964† |
| Follow-up duration (years), median (IQR) | 0.4 (0.0–2.9) | 0.4 (0.0–2.9) | 0.967† |
| SLE diagnosis, n (%) | 0.222‡ | ||
| Yes | 48 (43) | 24 (34) | |
| No | 64 (57) | 47 (66) | |
| Smoking status, n (%)§ | 0.451‡ | ||
| Current smoker | 42 (38) | 25 (39) | |
| Past smoker | 25 (23) | 10 (16) | |
| Never smoked | 43 (39) | 30 (46) | |
| Baseline CLASI activity score, median (IQR) | 4.5 (2.0–9.0) | 5.0 (2.0–10.0) | 0.912† |
| Baseline CLASI damage score, median (IQR) | 10.0 (6.0–14.5) | 6.0 (3.0–10.0) | <0.001† |
*Non-Black patients consisted of 45 non-Hispanic White patients, 18 Hispanic patients, 5 Asian patients, 2 mixed race patients and 1 Middle Eastern patient with DLE.
†P value was calculated with Mann-Whitney U test.
‡P value was calculated with χ2 test.
§Smoking status was missing for 8 patients.
CLASI, Cutaneous Lupus Erythematosus Disease Activity and Severity Index; DLE, discoid lupus erythematosus.