加拿大医生报告说,非吸烟者(主要是妇女)的晚期肺癌发病率上升。 Doctors in Canada report a rise in late-stage lung cancer among non-smokers, mainly women.

加拿大的医生注意到,在非吸烟者中,特别是妇女中,晚期肺癌诊断呈上升趋势。 Doctors in Canada are noting a rise in later-stage lung cancer diagnoses among non-smokers, particularly women. 尽管吸烟是主要的风险因素,但加拿大约有四分之一的案件涉及非吸烟者。 Though smoking is the main risk factor, about a quarter of cases in Canada involve non-smokers. 非吸烟者的风险因素包括气体、二手烟、石棉和空气污染。 Risk factors for non-smokers include radon gas, second-hand smoke, asbestos, and air pollution. 针对吸烟者的早期发现方案不会使非吸烟者受益,导致诊断和治疗的延迟。 Early detection programs targeting smokers do not benefit non-smokers, leading to delayed diagnoses and treatment.