Characteristics of Met/Met, Val/Met and Val/Val Subjects (Mean ± SD).

an = 42.bn = 44.cn = 19.dn = 63.en = 62.fn = 61.gn = 43.†Lower than Met/Met and Val/Met, p*p values are for the comparison of the three genotypes.**One week prior to study entry.#Genotypic frequencies are in parentheses. Met allele frequency was .520 for whites and .340 African Americans; Val allele frequency was .480 for whites and .660 African Americans. The ethnicities showed Met/Met genotypic (χ2 = 9.48, p = 0.002) and allelic differences (χ2 = 8.43, p = 0.004).an=42、bn=44、cn=19、dn=63、en=62、fn=61、gn=43。†该组低于甲硫氨酸/甲硫氨酸（Met/Met）与缬氨酸/甲硫氨酸（Val/Met）组，p*p值用于三种基因型的比较。**研究入组前1周。#基因型频率以括号内数值呈现。白人群体的Met等位基因频率为0.520，非裔美国人群体为0.340；Val等位基因频率在白人群体中为0.480，非裔美国人群体为0.660。不同种族间的Met/Met基因型（χ²=9.48，p=0.002）及等位基因频率（χ²=8.43，p=0.004）均存在显著差异。