Odds ratios (95% confidence intervals) from multivariate logistic and ordered logit analyses*.
| SLEDAI-2K | SLICC/ACR DI | |||||
|---|---|---|---|---|---|---|
| Alopecia | Rash | Total Cutaneous | Alopecia | Scarring | Total Cutaneous | |
| Current smoking | 1.08 (0.27, 4.38) | 6.18 (1.63, 23.40) | 1.83 (0.69, 4.89) | 1.95 (0.75, 5.06) | 4.70 (1.04, 21.18) | 2.73 (1.10, 6.81) |
| Age (yrs) | 0.10 (0.95, 1.05) | 1.01 (0.95, 1.07) | 0.99 (0.95, 1.03) | 1.00 (0.97, 1.04) | 1.01 (0.95, 1.07) | 1.00 (0.97, 1.04) |
| Female | ** | 0.90 (0.07, 11.69) | 1.09 (0.20, 5.77) | 2.78 (0.32, 24.24) | ** | 3.51 (0.41, 9.88) |
| Caucasian | 0.94 (0.23, 3.87) | 4.20 (0.39, 45.58) | 1.43 (0.44, 4.66) | 1.12 (0.38, 3.27) | 0.31 (0.05, 1.87) | 0.83 (0.30, 2.28) |
| Disease duration | 1.02 (0.96, 1.09) | 0.97 (0.90, 1.04) | 0.99 (0.95, 1.04) | 1.05 (1.00, 1.09) | 1.02 (0.95, 1.11) | 1.05 (1.00, 1.09) |
| Antimalarial use† | 1.29 (0.32, 5.09) | 2.86 (0.47, 17.46) | 1.74 (0.58, 5.21) | 2.28 (0.79, 6.62) | 0.32 (0.07, 1.41) | 1.63 (0.63, 4.23) |
| ANA positivity† | 1.53 (0.28, 8.23) | 0.49 (0.10, 2.34) | 0.79 (0.27, 2.27) | 0.79 (0.29, 2.16) | 0.61 (0.12, 3.13) | 0.74 (0.29, 1.92) |
| Anti-dsDNA positivity† | 1.23 (0.35, 4.28) | 3.93 (0.89, 17.36) | 1.66 (0.63, 4.42) | 0.65 (0.23, 1.83) | ** | 0.54 (0.20, 1.48) |
| Anti-SSA antibody† | 1.76 (0.51, 6.15) | 1.09 (0.26, 4.64) | 1.22 (0.46, 3.20) | 1.74 (0.70, 4.34) | 0.47 (0.09, 2.41) | 1.36 (0.57, 3.22) |
↵* Logistic analyses when the outcome was a single item, and ordered logit analyses when the outcome was the total cutaneous score (or overall total score).
↵† All clinical variables reflect current status at time of study visit.
↵** Sex was perfectly correlated with alopecia on the SLEDAI-2K, and with SLICC/ACR-DI scarring; thus this variable had to be removed from the given model for proper estimation. Similarly, anti-dsDNA positivity was perfectly correlated with SLICC/ACR-DI scarring, and had to be removed from the model when examining this outcome. SLEDAI-2K: Systemic Lupus Erythematosus Disease Activity Index, version 2000. SLICC/ACR-DI: Systemic Lupus International Collaborating Clinics/American College of Rheumatology Damage Index.