Table 3.

Correlations of plasma vitamin C status with renal function parameters (n = 136).

Parameter	Spearman Correlation (r)
Plasma cystatin C	−0.25 **
Serum creatinine	−0.23 **
Urine albumin	−0.22 **
Urine creatinine	−0.07
Albumin to creatinine ratio (ACR)	−0.21 **
Estimated glomerular filtration rate (eGFR)	0.16

** correlations significant at <0.01.