Table 3.

Univariate Cox proportional hazards regression model for progression of CKD

Variable	Units of Increase	HR	95% CI	χ2	P
Age	1 yr	1.01	0.99 to 1.03	1.23	0.12
eGFR	10 ml/min/1.73 m2	0.78	0.63 to 0.96	2.27	0.02
Ca X P	1 mg2/dl2	1.02	0.99 to 1.06	1.54	0.12
Fibrinogen	10 mg/dl	1.04	0.99 to 1.05	0.27	0.78
CRP	1 mg/L	0.99	0.95 to 1.03	0.16	0.86
uNGAL	10 ng/ml	1.04	1.02 to 1.05	5.20	<0.0001
sNGAL	10 ng/ml	1.02	1.01 to 1.03	3.61	0.0003
Proteinuria	100 mg/24 h/1.73 m2	1.03	0.99 to 1.04	0.85	0.39

HR, hazard ratio; CI, confidence interval; Ca X P, calcium phosphate product; CRP, C-reactive protein; sNGAL, serum NGAL; uNGAL, urinary NGAL.