Table 5.

Multivariate RRs and 95% CIs for prostate cancer in relation to level of physical activity according to combinations of stage and grade of cancer

	Localized, grade 1 or 2		Localized, grade 3 or 4		Advanced, grade 1 or 2		Advanced, grade 3 or 4
	No. cases	RR (95% CI)	No. cases	RR (95% CI)	No. cases	RR (95% CI)	No. cases	RR (95% CI)
Exercise at baseline
Never/rarely	1,731	1.00 (Reference)	309	1.00 (Reference)	138	1.00 (Reference)	102	1.00 (Reference)
1–3 times/mo	1,549	0.99 (0.92–1.06)	269	1.01 (0.85–1.19)	133	1.02 (0.80–1.30)	119	1.34 (1.03–1.76)
1–2 times/wk	2,807	1.02 (0.96–1.08)	430	0.93 (0.80–1.08)	227	1.01 (0.81–1.25)	146	0.97 (0.75–1.25)
3–4 times/wk	3,693	0.97 (0.92–1.03)	606	0.96 (0.83–1.10)	332	1.12 (0.92–1.38)	196	0.99 (0.77–1.26)
≥5 times/wk	2,936	1.02 (0.96–1.08)	488	1.01 (0.87–1.17)	243	1.09 (0.88–1.36)	191	1.26 (0.99–1.62)
P for trend		0.84		0.77		0.22		0.34
Activity during adolescence
Never/rarely	804	1.00 (Reference)	139	1.00 (Reference)	66	1.00 (Reference)	46	1.00 (Reference)
1–3 times/mo	672	1.03 (0.93–1.14)	112	1.02 (0.79–1.31)	44	0.79 (0.54–1.16)	42	1.15 (0.75–1.74)
1–2 times/wk	1,710	1.00 (0.92–1.09)	289	1.02 (0.83–1.25)	150	1.04 (0.78–1.39)	107	1.16 (0.82–1.65)
3–4 times/wk	3,158	0.97 (0.90–1.05)	514	0.96 (0.79–1.15)	280	1.02 (0.78–1.33)	186	1.07 (0.77–1.48)
≥5 times/wk	6,372	0.97 (0.90–1.04)	1,048	0.95 (0.80–1.14)	533	0.93 (0.72–1.21)	373	1.04 (0.76–1.42)
P for trend		0.054		0.29		0.55		0.49

NOTE: Multivariate models are adjusted for covariates indicated in Table 2. For 1,227 cases, grade information was not available.