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为了提高对肝炎流行的预测和防治水平。根据北京市１９５９～１９９０年疫情年、月报，采用χ２检验法分析了肝炎发病与厄尔尼诺现象之间的关系。结果表明厄尔尼诺年春、夏季、反厄尔尼诺年当年秋、冬季至次年春季可能容易高发肝炎。
In order to improve the prediction and prevention of hepatitis epidemic. According to the annual and monthly reports of the outbreak in Beijing from 1959 to 1990, the relationship between hepatitis incidence and El Niño was analyzed by χ2 test. The results show that El Niño spring, summer, anti El Nino year autumn, winter to next spring may be prone to high incidence of hepatitis.