Table 3. Relative risk (RR) of prostate cancer from the Cox regression analysis with 95% confidence intervals (CI) by age at measurement and body mass index (BMI) or height, adjusted for birth cohort.

	Age at measurement (years)
	20–29 (622 cases)		30–39 (3196 cases)		40–49 (8996 cases)		50–59 (11 009 cases)		60–69 (7594 cases)		70–74 (1897 cases)
Variable	RR	95% CI	RR	95% CI	RR	95% CI	RR	95% CI	RR	95% CI	RR	95% CI
BMI (kg m−2)
<18.50	0.93	0.41–2.08	1.02	0.59–1.76	0.72	0.48–1.09	0.77	0.55–1.08	1.17	0.90–1.51	0.53	0.29–0.99
18.50–24.99	1.00	Referent	1.00	Referent	1.00	Referent	1.00	Referent	1.00	Referent	1.00	Referent
25.00–29.99	1.20	1.00–1.44	1.06	0.99–1.14	1.06	1.02–1.11	1.09	1.05–1.14	1.08	1.03–1.13	1.08	0.98–1.18
⩾30.00	1.22	0.69–2.17	1.19	0.99–1.44	1.05	0.95–1.16	1.05	0.97–1.14	1.14	1.04–1.24	1.04	0.87–1.23
Height (cm)
<160	0.56	0.08–3.97	0.42	0.18–1.02	0.52	0.35–0.78	0.70	0.56–0.88	0.65	0.54–0.80	0.60	0.43–0.83
160–169	0.73	0.53–1.01	0.91	0.81–1.03	0.91	0.85–0.97	0.90	0.86–0.95	0.91	0.86–0.95	0.87	0.79–0.95
170–179	1.00	Referent	1.00	Referent	1.00	Referent	1.00	Referent	1.00	Referent	1.00	Referent
180–189	1.14	0.97–1.35	1.04	0.96–1.12	1.04	0.99–1.09	1.02	0.97–1.08	1.10	1.02–1.19	1.16	0.97–1.37
⩾190	0.62	0.34–1.13	1.12	0.89–1.42	1.18	1.00–1.40	1.08	0.85–1.38	1.00	0.64–1.58	0.00	0.00–∞