Table 2.

Cox proportional hazards model of time to lung cancer incidence according to past participation in 3×/week strenuous physical activity at ages 18, 35, and 50 years

	Past participation in strenuous physical activity	No of. cases	No. of non-cases	HR1 (95% CI)	p Values
Age 18 yr	No	1,117	69,027	Ref.	0.23
	Yes	1,031	58,226	1.05 (0.97–1.15)
Age 35 yr	No	1,219	70,727	Ref.	0.65
	Yes	929	56,526	0.98 (0.90–1.07)
Age 50 yr	No	1,379	80,481	Ref.	0.72
	Yes	769	46,772	0.98 (0.90–1.08)

¹All physical activity models are adjusted for age, race/ethnicity, BMI, family history of cancer, personal history of cancer, history of asthma, history of emphysema or chronic bronchitis, smoking, education, alcohol intake, vitamin D use, hormone therapy, oral contraceptive use, NSAID use, hormone therapy trial arm, hysterectomy status, CAD trial arm, OS/CT, servings of fruit, vegetables, and red meat.