Table 1: Clinical characteristics of lupus glomerulonephritis patients, primary glomerulonephritis patients and control group. Results are expressed as number, means ± S.D., percentage and median (range).

LG Group (n=15) PG Group (n=17) Control Group (n=32)
Mean age (years) 39.0 ± 12.7 43.3 ± 14.8 40.4 ± 10.4
Sex, M/F n 2/13 12/5 13/19
Months of diagnosis 80.5 43.0* NA
Diabetes (n, %) 2 (13.3%) 2 (11.8%)* 0
Hypertension (n, %) 8 (53.2%) 16 (94.1%)* 0
Dyslipidemia (n, %) 2 (13.3%) 5 (29.4%) 0
C3 (mg/dl) 110.3 ± 27.5 125.3 ± 32 131.4 ± 30.8
C4 (mg/dl) 23 (14-37) 34 (22-38.5) 28 (16-40)
CRP (mg/dl) 1 (0.1-3.4) 0.6 (0.1-1.2) 0.9 (0.1-1.8)
Albumin (g/dL) 3.92 ± 0.6 4.0 ± 0.6 4.5 ± 0.2
24 h Proteinuria (mg) 914± 1719 1109 ± 1850 156 ± 24 §
Creatinine clearance (ml/min) 102.2 ± 30.3 99.1 ± 38.8 105.3 ± 16.2
Ca (mg/dl) 9.1 ± 0.5 9.4 ± 0.7 9.6 ± 0.5
P (mg/dl) 3.5 ± 0.8 3.3 ± 0.7 3.2 ± 0.9
PTH (pg/ml) 36.3 (28-67) 40.1 (31-43.9) 30.7 (23-47)
Vitamin D therapy (n, %) 8 (53.3%) 11 (68.7%) 0
Steroid therapy (months) 48 (39-120) 20 (7-42) NA
Total glucocorticoid cumulative dose, (g) 9.06± 4.09 5.2± 2.3 NA
Immunosuppressive therapy (months) 47 (33-88) 8 (3-26) NA
SLEDAI-2K 8.26± 3.99 NA NA

LG: lupus glomerulonephritis; PG: primary glomerulonephritis; C3: serum complement C3; C4: serum complement C4; CRP: C-reactive protein; PTH: Parathyroid Hormone; Ca: Calcium; P: Phosphorus; SLEDAI-2K: Systemic Lupus Erythematosus Disease Activity Index. NA: Not applicable. *p<0.05 LG vs PG; §: p<0.001 Control vs LG and PG.