Table 6.

Association between renal biopsy National Institutes of Health (NIH) activity and chronicity indices and clinical renal predictors.

Variable	Estimated Effect on Mean Renal Biopsy NIH Activity Index per 1 Unit of Variable	p

Urinalysis protein	1.366 ± 0.768	0.08
Urinalysis red blood cells/hpf	0.144 ± 0.075	0.06
Urinalysis white blood cells/hpf	0.191 ± 0.056	0.0006
Urine creatinine level	0.016 ± 0.012	0.18
Urine protein/creatinine ratio	0.238 ± 0.355	0.50
24-h protein	4.020 ± 0.345	< 0.0001
Serum creatinine	−0.231 ± 1.697	0.47
SLICC renal activity score	0.437 ± 0.156	0.005
Log-normalized VCAM	−1.329 ± 1.154	0.25
Log-normalized NGAL	−0.878 ± 1.316	0.50

	Estimated Effect on Mean Renal Biopsy NIH Chronicity Index per 1 Unit of Variable	p

Urinalysis protein	−0.361 ± 0.357	0.31
Urinalysis red blood cells/hpf	0.017 ± 0.038	0.66
Urinalysis white blood cells/hpf	0.009 ± 0.026	0.71
Urine creatinine level	−0.003 ± 0.005	0.60
Urineprotein/creatinine ratio	−0.172 ± 0.157	0.28
24-h protein	−1.043 ± 0.603	0.084
Serum creatinine	2.511 ± 0.549	< 0.0001
SLICC renal activity score	−0.036 ± 0.083	0.66
Log-normalized VCAM	−0.627 ± 0.518	0.23
Log-normalized NGAL	−0.845 ± 0.577	0.14

SLICC: Systemic Lupus International Collaborating Clinics; VCAM-1: vascular cell adhesion molecule-1; NGAL: neutrophil gelatinase-associated lipocalin; hpf: high power field.