方法将天津市1992～ 2 0 0 1年循环系疾病死亡状况进行汇总分析，应用死亡率及潜在寿命损失年数（PYLL）揭示10年的动态变化。
Methods This study analyzed 10-year (1992~2001) diseases of circulatory system mortality trends, and disclosed the 10-year death trend by using death rate and person-years of life lost (PYLL).
方法将天津市1992～ 2 0 0 1年循环系疾病死亡状况进行汇总分析，应用死亡率及潜在寿命损失年数（PYLL）揭示10年的动态变化。
Methods This study analyzed 10-year (1992~2001) diseases of circulatory system mortality trends, and disclosed the 10-year death trend by using death rate and person-years of life lost (PYLL).
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