Table 3.

Prevalence ratios and 95% confidence intervals of AC based on walking metabolic activity in 2,976 participants from the NHLBI Family Heart Study

	Cases/n	*Crude	Age and sex adjusted	Full model
≤ 3.75 met-hrs/wk	443/830	1.0	1.0	1.0
>3.75–7.5 met-hrs/wk	215/424	0.91 (0.72, 1.14)	1.04 (0.76, 1.45)	1.11 (0.75–1.64)
>7.5–15 met-hrs/wk	415/876	0.79 (0.64, 0.96)	0.92 (0.72, 1.19)	0.89 (0.66–1.20)
>15–22.5 met-hrs/wk	216/450	0.81 (0.63, 1.03)	1.02 (0.74, 1.40)	1.11 (0.75–1.64)
>22.5 met-hrs/wk	183/392	0.77 (0.60, 0.98)	0.92 (0.67, 1.27)	0.97 (0.66–1.44)
P trend		0.01	0.63	0.75

^*The crude model adjusted for familial clustering. The second model adjusted for age, sex and familial clustering. The full model adjusted for age, sex, race, smoking, alcohol use, total exercise metabolic activity (excluding walking), and familial clustering.

AC = aortic calcification, defined as AC>100