Table 5. Predicted lung cancer risk within 8 years by modification of smoking habits among smokers.

	Percentile of lung cancer risk
Risk factor	5th	25th	50th	75th	95th
Age (years)	34	33	42	46	57
Smoking	Never	≥1 pack/day	0.5–0.99 pack/day	≥1 pack/day	≥1 pack/day
Age at smoking initiation	NA	19≤ Age <30	30≤ Age <40	30≤ Age <40	19≤ Age <30
BMI	23.0–24.9	≥25.0	≥25.0	23.0–24.9	≥25.0
Physical activity	No	Light	Light	No	No
Glucose, mg/dL	<126	<126	<126	<126	<126
8-year risk if no further smoking, % (A)	NA	0.013	0.072	0.171	0.726
8-year risk if continued smoking, % (B)	NA	0.044	0.152	0.561	2.514
Ratio (B/A)	NA	3.496	2.101	3.282	3.465

^†NA = not applicable.