Table 2.

Age-Adjusted Cardiovascular Event Incidence Rates and Incidence Rate Ratios by SBP Category,^a 1987–2010

Event Type	Low SBPa					Standard SBPa
	No.	All Events	Person-years	AAIR	IIR [Ref]	No.	All Events	Person-years	AAIR	IIR (95% CI)
Composite
Total	911	283	16 226	24.7	1	1469	518	25 027	28.7	1.16 (1.00–1.34)
Male	354	126	5953	28.5	1	671	257	10 726	31.9	1.12 (0.90–1.39)
Female	557	157	10 273	22.8	1	798	261	14 301	26.5	1.16 (0.95–1.41)
African American	373	133	6575	28.4	1	645	237	10 937	29.1	1.02 (0.82–1.26)
White	538	150	9651	21.8	1	824	281	14 090	28.8	1.32 (1.08–1.61)
HF
Total	1028	224	19 083	19.8	1	1594	379	28 732	20.0	1.01 (0.86–1.19)
Male	433	110	7630	24.9	1	753	174	12 990	19.9	0.80 (0.63–1.02)
Female	595	114	11 452	16.5	1	841	205	15 743	20.1	1.22 (0.97–1.54)
African American	398	91	7407	18.4	1	683	170	12 259	20.6	1.12 (0.87–1.45)
White	630	133	11 675	20.8	1	911	209	16 473	19.9	0.96 (0.77–1.19)
Stroke
Total	1201	111	22 451	6.8	1	1792	190	33 093	7.8	1.14 (0.90–1.44)
Male	482	50	8859	7.5	1	816	82	14 417	6.6	0.87 (0.61–1.24)
Female	719	61	13 859	6.4	1	976	108	18 676	8.8	1.36 (0.99–1.86)
African American	473	56	8757	8.7	1	751	92	13 573	8.9	1.02 (0.73–1.42)
White	728	56	13 694	5.6	1	1041	98	19 520	7.2	1.27 (0.91–1.77)
MI/CHD
Total	1109	168	20 400	11.7	1	1705	284	30 594	12.4	1.07 (0.88–1.30)
Male	408	88	7076	16.7	1	736	145	12 498	14.2	0.85 (0.65–1.11)
Female	701	80	13 323	9.2	1	969	139	18 096	11.3	1.23 (0.93–1.61)
African American	461	74	8506	12.8	1	738	118	13 226	11.4	0.89 (0.66–1.19)
White	648	94	11 893	10.9	1	967	166	17 368	13.4	1.23 (0.96–1.58)

Abbreviations: AAIR, age-adjusted incidence rate; HF, heart failure; IRR, incidence rate ratio; MI/CHD, combination measure myocardial infarction/coronary heart disease death; Ref, referent; SBP, systolic blood pressure.

^aLow SBP is defined as lower than 120 mm Hg; standard SBP, 120 to 139 mm Hg.