Research News

CT screening in current moderate smokers may be justified as study finds similar lung cancer risk to heavier smokers

BMJ 2015; 351 doi: https://doi.org/10.1136/bmj.h5549 (Published 20 October 2015) Cite this as: BMJ 2015;351:h5549
  1. Susan Mayor
  1. 1London

Low dose CT (computed tomography) lung cancer screening may be justified in current moderate smokers with a smoking history of 20-29 pack years, says a US study published in the Journal of the National Cancer Institute,1 which found that they had a similar risk of developing lung cancer to heavier smokers and ex-smokers who were currently eligible for screening.

US guidelines recommend low dose CT screening for current and former smokers aged 55-80 with at least 30 pack years of cigarette smoking, and former smokers must have quit within the previous 15 years. One pack year is equivalent to smoking 20 cigarettes (one pack) …

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