American Journal of Epidemiology Vol. 152, No. 4 : 334-346
Copyright © 2000 by The Johns Hopkins University School of Hygiene and Public Health
ORIGINAL CONTRIBUTIONS |
Occupational Status, Educational Level, and the Prevalence of Carotid Atherosclerosis in a General Population Sample of Middle-aged Swedish Men and Women: Results from the Malmö Diet and Cancer Study
1 Department of Community Medicine, Lund University, University Hospital, Malmö, Sweden.
2 Department of Medicine, Orthopedics, and Surgery, Lund University, University Hospital, Malmö, Sweden.
The associations among educational level, occupational status, and atherosclerosis were investigated during 1992–1994 in a general population sample of 4,176 Swedish men and women. Carotid artery intima-media thickness (IMT) and carotid stenosis were determined by B-mode ultrasound. Socioeconomic differences in mean carotid IMT and odds ratios for carotid stenosis prevalence were estimated. In women, the associations among educational level, occupational status, and IMT were weak. In men, there was no association between education and IMT, while low occupational status was associated with a thicker IMT. Women with low education had an increased odds of carotid stenosis compared with women with high education (odds ratio (OR) = 2.04, 95% confidence interval (CI): 1.53, 2.73), while this pattern was weaker among men. Women in manual occupations had an increased odds of carotid stenosis compared with women in high- or medium-level nonmanual occupations (OR = 1.75, 95% CI: 1.29, 2.36), which could not be seen among men. After adjustment for risk factors, the association between IMT and occupational status in men disappeared, while the associations among educational level, occupational status, and carotid stenosis in women persisted. The results imply that the atherosclerotic process is associated with socioeconomic status in both sexes, and they also indicate the possibility of sex differences in the mechanisms connecting socioeconomic status to atherosclerosis. Am J Epidemiol 2000;152:334–46.
atherosclerosis; carotid arteries; sex factors; socioeconomic factors
Abbreviations: CI, confidence interval; IMT, intima-media thickness; OR, odds ratio
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