Methods ystematically the ABO blood group distribution and the relations between the blood group and both sexes were analysed with Woolf statistical method and Chi-square( x 2) test in 578 cases of HBsAg-positive sera carrier.

• 方法 采用卡方 (x2 )检验方法与Woolf统计方法对 578例HBsAg阳性携带者血清的ABO血型分布及男女性别的关系进行系统分析。