Hardy-Weinberg equilibrium test for rs6903956 genotype frequencies among all patients (N = 1075).

χ2 = Σ (observed frequencies-expected frequencies) 2/expected frequencies = 2.363, df = 1, P = 0.124, rs6903956 genotype information was available for 1075 patients.

卡方(chi-square)统计量的计算公式为：χ² = Σ[(观测频数(observed frequencies) - 期望频数(expected frequencies))² / 期望频数]，本次计算得到的卡方值为2.363，自由度(degrees of freedom, df)为1，P值为0.124；共有1075名患者具备rs6903956的基因型信息。