Table 3. Correlation between blood lead levels and various indexes in the study subjects.

	Correlation coefficient (r)	p value
Age (year)	0.025	0.737
eGFR (ml/min × 1.73 m2)	−0.090	0.227
Serum CysC (mg/L)	0.722	0.001
Serum uric acid (μmol/L)	0.003	0.965
Serum urea nitrogen (mmol/L)	0.099	0.179
Serum creatinine (mmol/L)	0.21	0.004
Urinary ALB/Cr	0.079	0.289
Urinary KIM-1/Cr (ng/g)	0.407	0.001
Urinary NAG/Cr (U/g)	0.349	0.001
Urinary α1-MG/Cr (mg/g)	0.194	0.008
Urinary β2-MG/Cr (mg/g)	0.215	0.003