Table 1. Demographic features of the 18 SLE patients and 9 healthy controls in the study.

	SLE patients		Healthy controls
	NPSLE	Active without NP
Age (years, mean ± SD)	36.6±11.1	30.6±7.0	36.7±7.1
Sex (F/M)	9/0	9/0	9/0
Disease duration (years)	6.5±4.9	4.9±4.5
SLEDAI (mean ± SD)	13.7±5.4	12.9±2.2

SLE, systemic lupus erythematosus.