巴西东北部混合人群中乙肝表面抗原（HBsAg）与种族之间的关联。
Association between HBsAg and race in a mixed population of Northeastern Brazil.
作者信息
Conceição M M, Lyra L G, Azevedo E S, De Alameida-Melo N, Da Fonseca E F
出版信息
Rev Bras Pesqui Med Biol. 1979 Dec;12(6):405-9.
The frequency of Australian antigen carriers (HBsAg) was studied in three samples from northeastern Brazil. In sample A there were 1000 women from Tsylla Balbino Maternity in Salvador; in sample B there were 1,512 blood donors from Salvador, and in sample C there were 930 blood donors from Aracaju. In sample A, B and C the observed frequency of carriers (HBsAg) was 1.20%, 1.58% and 2.04% respectively. These differences were not significant (x22 = 2.2; p greater than 0.25). There was no association between the carrier state and sex, age, ABO and Rh blood groups, Chagas' disease and rural origin. However, the frequency of carriers (HBsAg) increases from White to Black, as follows: Whites = 0.5%; Mulattoes = 1.91%, and Black = 1.96% (x22 = 7.91; p less than 0.02).
对来自巴西东北部的三个样本中的澳大利亚抗原携带者（乙肝表面抗原）频率进行了研究。样本A是来自萨尔瓦多的齐利亚·巴尔比诺妇产医院的1000名女性；样本B是来自萨尔瓦多的1512名献血者，样本C是来自阿拉卡茹的930名献血者。在样本A、B和C中，携带者（乙肝表面抗原）的观察频率分别为1.20%、1.58%和2.04%。这些差异不显著（卡方值=2.2；p大于0.25）。携带者状态与性别、年龄、ABO和Rh血型、恰加斯病及农村出身之间无关联。然而，携带者（乙肝表面抗原）的频率从白人到黑人呈上升趋势，具体如下：白人=0.5%；混血儿=1.91%，黑人=1.96%（卡方值=7.91；p小于0.02）。
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