Table 3:

Plasma biomarker levels and conventional laboratory measures differentiating active lupus nephritis^*

	Active renal SLE (n=28)	Active non-renal SLE (n=29)	Inactive SLE (n=26)	Healthy controls (n=25)	P-values
Axl (pg/ml)	3765 ± 235.3	2825 ± 200.7	2513 ± 130.0	2091 ± 152.6	<0.0001 § 0.002 † 0.04 ¶
Ferritin (ng/ml)	110.8 ± 25.50	31.2 ± 3.39	18.3 ± 3.96	15.1 ± 2.70	<0.0001 § <0.0001 † >0.999 ¶
IGFBP4 (ng/ml)	180146 ± 355	140049 ± 320	108548 ± 247	157269 ± 411	0.51 § 0.21 † >0.99 ¶
sTNFR2 (pg/ml)	6966 ± 571	7195 ± 1002	5800 ± 568	6040 ± 1163	0.03 § 0.18 † >0.999 ¶
dsDNA Ab (titer)	80 (0–1280)	40 (0–160)	0 (0–17.5)	________	0.02 § 0.003 † 0.16 ¶
C3 (mg/dL)	61.7 ± 7.5	87.2 ± 5.4	113.5 ± 4.5	________	<0.0001 § <0.0001 † 0.09 ¶

^*Values were expressed as mean± standard deviation, except for dsDNA antibody titers (median, interquartile range)

^§:P-value for comparison between all groups

^†:P-value for active SLE vs. inactive SLE patients

^¶:P-value for active renal vs. active non-renal SLE patients