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. 2008 Dec;138(12):2323–2327. doi: 10.3945/jn.108.096404

FIGURE 1 .

FIGURE 1 

Prevalence of having circulating folic acid >85th percentile (A) and geometric mean RBC folate concentration (B) with 95% CI according to folic acid intake by DHFR WT/WT, del/WT, and del/del genotypes. The numbers above the bars represent the number of subjects in each category. Prevalence and means were calculated by general linear models adjusted for age and sex. Letters indicate a difference between genotypes at the same level of folic acid intake, P < 0.05: a del/del vs. WT/WT and WT/del; b del/del vs. WT/WT.