Table 2.

Mortality Rates^a and Hazard Ratios^b for Mortality According to Body Mass Index, Waist Circumference, and Physical Activity (n = 185,412), National Institutes of Health-AARP Diet and Health Study, 1996–2006

	Person-Years of Follow-Up	No. of Deaths	Mortality Rate	Hazard Ratio	95% Confidence Interval	P Value From Trend Test
Body mass indexc at age 50 yearsd						<0.01
18.5–<25	919,713	7,302	792	1.00	Referent
25–<30	690,634	6,110	932	1.08	1.05, 1.12
30–<35	148,482	1,598	1,287	1.48	1.40, 1.57
≥35	43,620	553	1,676	2.08	1.91, 2.27
Waist circumference categoryde						<0.01
1	767,082	5,845	812	1.00	Referent
2	480,615	3,981	839	1.02	0.98, 1.06
3	288,497	2,615	912	1.09	1.04, 1.14
4	266,254	3,122	1,220	1.47	1.40, 1.53
Moderate physical activity, hours/weekf						<0.01
≥7	466,369	3,445	741	1.00	Referent
4–7	485,946	3,839	822	1.11	1.06, 1.16
1–3	455,798	3,869	905	1.18	1.13, 1.24
<1	180,796	1,727	1,042	1.30	1.22, 1.37
Inactive	213,540	2,683	1,327	1.54	1.46, 1.62
Vigorous physical activity, times/weekf						<0.01
≥5	384,706	2,852	746	1.00	Referent
3–4	525,965	4,005	775	1.04	0.99, 1.09
1–2	403,721	3,413	907	1.15	1.09, 1.21
<1	237,415	2,135	997	1.21	1.14, 1.28
Inactive	250,641	3,158	1,323	1.55	1.47, 1.63

^aAge-standardized mortality rate per 100,000 person-years, standardized to the age distribution of the cohort in men and women.

^bAdjusted for age, race/ethnicity, education, smoking status, physical activity, and alcohol consumption.

^cWeight (kg)/height (m)².

^dAdjusted for moderate physical activity.

^eGroup 1: men <94 cm, women <80 cm; group 2: men 94–<102 cm, women 80–<88 cm; group 3: men 102–<110 cm, women 88–<96 cm; group 4: men ≥110 cm, women ≥96 cm.

^fAdjusted for body mass index.