Table 1.

Patient demographics and clinical findings at renal biopsy

	MLN (n=41)	PMN (n=59)	P Value (Mann–Whitney U Test)
Sex (male/female)	4/37	37/22	<0.001
Age (yr)	33 (26.8, 42.3)	53 (43.0, 66.0)	<0.001
Serum creatinine concentration (mg/dl)	0.70 (0.68, 0.80)	0.90 (0.80, 1.00)	0.002
Creatinine clearance (ml/min)	79.0 (68.5, 93.0)	79.0 (65.5, 97.3)	0.90
24-h urine protein (mg/dl)	1240 (918, 2739)	4990 (2798, 7534)	0.0002

Data are presented as median (interquartile range). MLN, membranous lupus nephritis; PMN, primary membranous nephropathy.