Association of age at starting cigarette/bidi smoking and time since quitting smoking with mortality from all-cause, cancer, and IHD among men.

aAdjusted for baseline age (years), BMI, and educational attainment.
bNon-cigarette/bidi smokers as the reference group.
cAmong current smokers.
dAmong past smokers.

a 校正基线年龄（单位：岁）、身体质量指数（Body Mass Index）与受教育程度。
b 以非香烟/比迪烟吸烟者为参照组。
c 仅针对当前吸烟者群体。
d 仅针对既往吸烟者群体。