界对人类健康与生命威胁最大的恶性肿瘤?多中心、大样本、病例-对照研究或/和前瞻性研究证实,系统有效的筛查可以大大提高肺癌早诊、早治率,提高治愈率,降低死亡率,改善患者预后和生活质量Р肺癌流行特征РРРРWorldwide Incidence of lung CancerР*Incidence per 100,000 population.Рmale ?54.8?female ?8.1??male? 75.9?female ?10.3??male? 39.3?female ?11.2??male? 47.6?female ?16.1??male? 34.7?female ?13.4??male? 12.9?female ?2.6??male? 29.1?female 7.7??male? 69.6?female ?32.9??male? 19.3?female ?7.9??male? 55.1?female ?7.6РРРРРРРРРРРРРРРРРРРРРРРРРРРРРРРРРРРРРРРParkin DM, et al. CA Cancer J Clin. 1999;49:33-64.РРEastern EuropeРJapanРNew ZealandРChinaРNorth AfricanРSouth AfricanРCentral AmericaРРРWestern EuropeРNorth AmericaРРSouth America