Table 2:

Univariate logistic regression analysis examining the association of patient characteristics with incident lupus nephritis (in the 130 cSLE patients without lupus nephritis at baseline).

Characteristics	Odds ratio	95% CI for Odds ratio	P-value
Presence of autoimmune cytopenia at cSLE diagnosis	0.43	0.12, 1.60	0.204
Age at cSLE diagnosis (in years)	0.99	0.83, 1.18	0.888
Sex (female versus male)	0.92	0.24, 3.54	0.906
Race (Black versus other)	2.20	0.59, 8.29	0.243
Arthritis	0.56	0.19, 1.64	0.290
Myositis*	3.07	0.85, 11.07	0.086
Positive anti-double-stranded DNA*	1.84	0.49, 6.94	0.367
Positive anti-ribonucleoprotein*	1.52	0.49, 4.73	0.474
Positive anti-Smith*	2.25	0.67, 7.49	0.188
Positive anti-SSA*	1.98	0.66, 5.95	0.744
Positive anti-SSB*	0.77	0.16, 3.71	0.224
low C3 complement at cSLE diagnosis*	3.81	1.01, 14.42	0.049S
eGFR < 90mL/min/1.73m2 at cSLE diagnosis	2.92	0.93, 9.15	0.066
SLEDAI-2K at cSLE diagnosis (per 1 point in score)	0.98	0.86, 1.11	0.740

Abbreviations: cSLE = childhood-onset systemic lupus erythematosus; ESR = Erythrocyte sedimentation rate; eGFR = Estimated glomerular filtration rate; SLEDAI-2k = Systemic Lupus Erythematosus Disease Activity Index 2000; SS = Sjogren syndrome-related antigen

^S= significant with p value < 0.05

^*By laboratory reference range