Table 2 Relative risk of renal cell cancer associated with standardised measured blood pressure and self reported blood pressure medication

	Women					Men
Variable	Person years	Cases	RR ^a	95% CI	P _trend ^b	Person years	Cases	RR ^a	95% CI	P _trend ^b
Systolic blood pressure (mm Hg)
<130	304 754	13	1.0	(Reference)	’	200 863	31	1.0	(Reference)	’
130–149	145 513	26	1.7	(0.9–3.5)	’	223 960	40	0.8	(0.5–1.4)	’
150–169	73 828	24	2.0	(0.9–4.2)	’	81 183	35	1.2	(0.7–2.0)	’
⩾170	53 060	22	2.0	(0.9–4.6)	0.11	33 890	18	1.0	(0.5–1.9)	0.59
Diastolic blood pressure (mm Hg)
<85	346 610	31	1.0	(Reference)	’	264 778	41	1.0	(Reference)	’
85–94	145 246	22	0.8	(0.5–1.5)	’	173 219	56	1.6	(1.0–2.3)	’
95–104	64 349	22	1.4	(0.8–2.5)	’	76 975	20	1.0	(0.6–1.7)	’
⩾105	20 950	10	1.6	(0.8–3.5)	0.13	24 924	7	0.9	(0.4–2.0)	0.49
Blood pressure medication ^c
No	504 135	57	1.0	(Reference)	’	499 677	106	1.0	(Reference)	’
Yes	73 020	28	1.4	(0.8–2.2)	’	40 219	18	1.1	(0.6–1.8)	’

CI=confidence interval, RR=relative risk.
^aAdjusted for age, blood pressure medication (no, yes), body mass index (<18.5, 18.5–24.9, 25.0–29.9, ⩾30.0), smoking status (never, former, current, unknown), education (<10, 10–12, ⩾13 years, unknown).
^bP-values from trend test using the categories as an ordinal variable in the Cox regression model.
^cAdjusted for age, body mass index (<18.5, 18.5–24.9, 25.0–29.9, ⩾30.0), smoking status (never, former, current, unknown), education (<10, 10–12, ⩾13 years, unknown).

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