HIF-1α SNP genotype and allele frequencies between subcategories of ON patients and control subjects.

*Fisher chi-square analysis, P values **OR, Odds ratio; CI, confidence interval.Calculations were performed for genotypes: CC vs CT+TT.* 费希尔卡方检验（Fisher chi-square analysis）、P值（P value）、比值比（Odds ratio，简称OR）及置信区间（confidence interval，简称CI）。针对基因型CC与CT+TT的比较开展了相关计算。