BMJ  2004;329 (24 July), doi:10.1136/bmj.329.7459.0-b

Passive smoking increases the risk of heart disease

People exposed to high levels of passive smoking are more likely to develop coronary artery disease. Following up 4729 non-smokers included in the 1978-80 British regional heart study, Whincup and colleagues (p 200) found that those with higher concentrations of serum cotinine were 50-60% more likely to have coronary artery disease, but their risk of stroke was not increased. Studies looking at smoking in partners seem to underestimate the risk of exposure to passive smoking, say the authors.

Credit: BURGER/PHANIE/REX

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Passive smoking and risk of coronary heart disease and stroke: prospective study with cotinine measurement

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