Distribution of the MTHFR C677T and A1298C genotypes stratified by age and gender

aP for trend based on chi-square test.bP for interaction based on likelihood ratio test; NS, non-significant.c OR, odds ratio; CI, confidence interval.* Statistically significant.Distribution of the MTHFR C677T and A1298C genotypes stratified by age and gendera. P值为基于卡方检验（chi-square test）的趋势检验结果。 b. P值为基于似然比检验（likelihood ratio test）的交互作用检验结果；NS表示无统计学意义。 c. OR为比值比（odds ratio）；CI为置信区间（confidence interval）。 * 代表结果具有统计学显著性。 按年龄与性别分层的亚甲基四氢叶酸还原酶（Methylenetetrahydrofolate Reductase, MTHFR）C677T及A1298C基因型分布情况。