Baseline features of patients with SLE with lupus nephritis defined clinically or histologically (N=502) and defined histologically (N=241) from the GLADEL cohort
| Variable | N=502 | N=241 |
|---|---|---|
| Female gender, n (%) | 451 (89.8) | 211 (87.6) |
| Age at diagnosis, years, median (IQR) | 26.0 (19.0–35.0) | 26.0 (20.0–34.0) |
| Age at nephritis diagnosis, years, median (IQR) | 27.0 (20.3–36.2) | 26.8 (20.3–34.7) |
| Follow-up after nephritis diagnosis, years, median (IQR) | 3.6 (1.6–5.2) | 2.9 (0.9–4.9) |
| Creatinine at baseline, mg/dl, median (IQR) | 1.0 (0.8–1.2) | 1.0 (0.8–1.4) |
| Proteinuria at baseline, mg/day, median (IQR) | 1154 (500.0–2690.0) | 1600 (700–3210) |
| SDI at baseline, median (IQR) | 1.0 (0.0–2.0) | 1 (0–2) |
| Ethnic group | ||
| Caucasian, n (%) | 201/500 (40.2) | 88 (36.7) |
| Mestizo, n (%) | 224/500 (44.8) | 117 (48.7) |
| Afro Latin-American, n (%) | 58/500 (11.6) | 25 (10.4) |
| Other, n (%) | 17/500 (3.4) | 10 (4.2) |
| Socioeconomic status | ||
| High, n (%) | 31/499 (6.2) | 13 (5.4) |
| Medium, n (%) | 150/499 (30.1) | 83 (34.4) |
| Low, n (%) | 318/499 (63.7) | 145 (60.2) |
| Residency | ||
| Urban, n (%) | 456/500 (91.2) | 221 (92.1) |
| Rural, n (%) | 44/500 (8.8) | 19 (7.9) |
IQR, Interquartile range; SDI, Systemic Lupus International Collaborating Clinics/American College of Rheumatology Damage Index.