Table 1 Demographic and clinical characteristics of patients with SLE at the time of diagnosis
|  | Total (N = 48) | Group 1 (N = 20) | Group 2 (N = 28) | p-value |
|---|---|---|---|---|
Female gender, n (%) | 42 (87.5) | 18 (90.0) | 24 (85.7) | 1 |
Age at SLE diagnosis (years), mean (SD) | 13.16 (2.4) | 13.08 (2.1) | 13.21(2.6) | 0.855 |
Duration of follow-up (years), mean (SD) | 5.32 (2.7) | 4.63 (2.8) | 5.82 (2.7) | 0.140 |
Time to LN, median (range) |  | 4.28 (0.8–12.1) | NA |  |
Age at LN diagnosis (years) |  | 17.85 (11.9–26.8) | NA |  |
Clinical manifestations (at SLE diagnosis), n (%) | ||||
 Malar rash |  | 12 (60.0) | 15 (53.6) | 0.771 |
 Discoid rash |  | 1 (5.0) | 9 (32.1) | 0.031 |
 Photosensitivity |  | 5 (25.0) | 6 (21.4) | 1 |
 Oral ulcers |  | 8 (40.0) | 8 (28.6) | 0.537 |
 Arthritis |  | 14 (70.0) | 16 (57.1) | 0.546 |
 Serositis |  | 4 (20.0) | 3 (10.7) | 0.429 |
 Seizure/ psychosis |  | 1 (5.0) | 2 (7.1) | 1 |
 Hematologic |  | 14 (70.0) | 22 (78.6) | 0.520 |
 Immunologic |  | 20 (100) | 26 (92.9) | 0.503 |
 Antinuclear antibody |  | 20 (100) | 27 (96.4) | 1 |
 Hepatitis |  | 3 (15.0) | 5 (17.9) | 1 |
Hemogram (at SLE diagnosis), n (%) | ||||
 Leukopeniaa |  | 3 (21.4) | 9 (33.3) | 0.494 |
 Lymphopeniab |  | 9 (64.3) | 14 (51.9) | 0.520 |
 Thrombocytopeniac |  | 3 (20) | 5 (18.5) | 1 |