卡方趋势检验
Chi-square trend test
以上为机器翻译结果，长、整句建议使用 人工翻译 。
采用卡方和趋势卡方检验，探讨国内外SARS病死率的差异及其变化规律。
Differences in the fatality rates of SARS across the world as well as the patterns of the differences were discussed using Chi-square and trend Chi-square tests.
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