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Knowing when to quit

BMJ 2018; 360 doi: (Published 25 January 2018) Cite this as: BMJ 2018;360:k350
  1. Rebecca Coombes, head of news and views
  1. The BMJ
  1. rcoombes{at}

A research article in The BMJ this week contains a useful message to readers helping patients who are making new year attempts to stop smoking. The risk of developing cardiovascular disease even if patients smoke just one cigarette a day is higher than expected—as much as half the risk of smoking 20 a day—the paper finds (doi:10.1136/bmj.j5855).

The researchers, from University College London, analysed 141 studies to estimate the relative risks of smoking one, five, or 20 cigarettes a day. They found that men who smoked …

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