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为调查肺癌的发生率与吸烟习惯之间的关系,作者研究了619225名妇女,并随访4年以上(1982～1986年)。在这期间,因肺癌死亡的总例数是1006名。按女性吸烟者标准死亡比率(SMR)的定义进行计算和分析。结果发现,对现在吸烟者,SMR 是12.7;对以前吸烟者,SMR 是4.8。对那些并无慢性疾病史且现在还在吸烟的妇女,SMR 上升至17.6。分析统计结果表明,SMRs 随着每日吸烟支数的增加而上升,对日吸烟31支或更多的妇女,SMR上升到22.0;SMRs 随着吸烟持续期间的增长而增加,随着戒烟期间的增长而减少。妇女50年代时肺癌的死亡率大约介于2至1;60年代则上升至3至1。随着妇女们开始吸烟的年龄越来
To investigate the relationship between the incidence of lung cancer and smoking habits, the authors studied 619,225 women and followed up for more than 4 years (1982-1986). During this period, the total number of deaths due to lung cancer was 1006. Calculated and analyzed according to the definition of female smoker’s standard death rate (SMR). The results showed that for current smokers, the SMR was 12.7; for previous smokers, the SMR was 4.8. For those women who did not have a history of chronic disease and are still smoking, their SMR increased to 17.6. The results of analysis showed that the SMRs increased with the increase of daily smoking counts, and the SMR increased to 22.0 for women with 31 or more cigarettes smoked per day. The SMRs increased with the duration of smoking, Increase and decrease. The death rate of lung cancer in women in the 1950s ranged from about 2 to 1; in the 1960s, it rose to 3 to 1. As women start smoking more and more old