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. Author manuscript; available in PMC: 2019 Mar 1.
Published in final edited form as: Atherosclerosis. 2018 Feb 4;270:110–116. doi: 10.1016/j.atherosclerosis.2018.01.044

Table 2.

Risk of clinical abdominal aortic aneurysm in relation to quartiles of carotid intima-media thickness (cIMT), ARIC, 1987–2011

cIMT Quartile 1 Quartile 2 Quartile 3 Quartile 4 p for trend
Quartile range, mm 0.37 – 0.63 0.64 – 0.71 0.72 – 0.82 0.83 – 2.26
N at risk 3643 3644 3644 3644
No. events 59 95 139 249
Incidence ratea 0.76 (0.59, 0.98) 1.26 (1.03, 1.55) 1.92 (1.63, 2.27) 3.90 (3.45, 4.42)
HR (95% CI)
Model 1b 1 1.32 (0.96, 1.84) 1.62 (1.18, 2.21) 2.71 (2.01, 3.67) <0.0001
Model 2c 1 1.11 (0.80, 1.54) 1.15 (0.84, 1.59) 1.55 (1.13, 2.11) 0.006

CI: confidence interval; HR: hazard ratio;

a

Crude incidence rate per 1000 person-years;

b

Model 1: Adjusted for age, sex, race, and ARIC center;

c

Model 2: Adjusted for age, sex, race, ARIC center, height, smoking status, pack-years of smoking, total cholesterol, high-density lipoprotein cholesterol, use of lipid medications, systolic blood pressure, use of antihypertensive medications, and diabetes at ARIC Visit 1.