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Epidemiologic AnalysisA Case-Oriented Approach$
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Steve Selvin

Print publication date: 2001

Print ISBN-13: 9780195146189

Published to Oxford Scholarship Online: September 2009

DOI: 10.1093/acprof:oso/9780195146189.001.0001

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Odds Ratio and Relative Risk

Odds Ratio and Relative Risk


(p.13) Chapter 2 Odds Ratio and Relative Risk
Epidemiologic Analysis

Steve Selvin

Oxford University Press

This chapter presents a two-part study. The first part examines the relationship between exposure to maternal cigarette smoking during pregnancy and the risk of a low birth weight infant among four race/ethnicity groups. The second part describes the association between the risk of a coronary event and a binary classification of behavior type (labeled type A and type B) while accounting for the influence of differences in body weight. Maternal cigarette smoking is strongly associated with the likelihood of a low birth weight newborn infant, and the risk is similar regardless of the mother's race/ethnicity (white, African-American, Hispanic, or Asian). The analysis of the WCGS data indicates a strong association between a person's behavior and the risk of a CHD event. The relative risk for a type A versus a type B individual, accounting for the confounding influence of body weight, is 2.145 (95% CI: 1.658, 2.775).

Keywords:   maternal cigarette smoking, pregnancy, low birth weight, infants, coronary event, heart disease

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