Table 3.

Daily folic acid intake, serum folic acid levels, and prevalence of folic acid deficiency in CKD grades 3 and 4 group compared with CKD grades 1 and 2 group

Variables	CKD 1–2 (n=64)	CKD 3–4 (n=64)	P-value
DIFA, μg/day	352.4±76.6	248.1±68.8	<0.001*
SFA, nmol/L	19.0±6.7	8.9±3.4	<0.001*
SFA, <7.1 nmol/L (%)	6.1	19.7	0.01**

Notes: Values are presented as mean ± standard deviation unless otherwise stated.

^*Independent-samples t-test;

^**chi-square test.

Abbreviations: DI_FA, daily intake of folic acid; S_FA, serum levels of folic acid; CKD, chronic kidney disease.