In addition, stratified analysis by NHL subtype (Figure 3) revealed that carriers of the MTHFR C677T TT genotype were at significantly greater risk of developing FL (homozygous: OR=1.25, 95% CI=1.02-1.53; recessive: OR=1.28, 95% CI=1.06-1.56) than those with the CT and/or CC genotypes were (Table 2). Here, MTHFR is linked to non-Hodgkin lymphoma.