Table 4. Influencing coefficients of factors on Scys-C and Scr.

Variable	<60y		≥60y		Total
	Scr	Scys-C	Scr	Scys-C	Scr	Scys-C
Adjusted for rGFR
Gender	−0.263**	−0.094**	−0.096	0.079	−0.182**	−0.062**
BSA	−0.123	−0.135	3.968*	0.429	0.333**	−0.003
BMI	−0.002	0.005	0.133*	0.020**	0.016**	0.002
Nephritis	0.224**	0.146**	0.176**	0.138*	0.206**	0.155**
Kidney neoplasm	−0.081**	−0.063**	−0.086*	−0.064*	−0.084**	−0.072**
Hematological disease	−0.248**	−0.013	−0.163*	0.081	−0.243**	0.006
Hypertension	0.051	0.005	0.081*	0.064*	0.061**	0.036
Diabetic mellitus	−0.026	0.075	0.015	0.014	0.005	0.034

BMI, Body mass index, BSA, Body surface area, rGFR, Reference glomerular filtration rate, Scys-C, serum cystatin C, Scr, serum creatinine.

^* P<0.05, ^** P<0.01.