Smoking and drinking habits among the JPHC study participants at baseline survey. Japan Public Health Center-based Prospective Study on Cancer and Cardiovascular Diseases.

J Epidemiol · 2001 · PMC11858363 · PMID 11763139

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a decreasing trendno p-value reported

The proportion of former smokers has not been reported by the Japan Tobacco Survey, though repeated surveys reveal a decreasing trend in current smokers since the late 1960s.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.