Effects of tobacco smoking on cancer and cardiovascular disease in urban black South Africans.

Br J Cancer · 2008 · PMC2391108 · PMID 18362941

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a significant trendno p-value reported

There was a significant trend in lung cancer risk increasing with age, and with former smokers having a two-fold lower risk than current smokers.

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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.