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Background: Smoking cessation was examined among high-risk participants in the UK Lung Cancer Screening (UKLS) Pilot Trial of low-dose CT screening.
Methods: High-risk individuals aged 50-75 years who completed baseline questionnaires were randomised to CT screening (intervention) or usual care (no screening control). Smoking habit was determined at baseline using self-report. Smokers were asked whether they had quit smoking since joining UKLS at T (2 weeks after baseline scan results or control assignment) and T (up to 2 years after recruitment). Intention-to-treat (ITT) regression analyses were undertaken, adjusting for baseline lung cancer distress, trial site and sociodemographic variables.
Results: Of a total 4055 individuals randomised to CT screening or control, 1546 were baseline smokers (759 intervention, 787 control). Smoking cessation rates were 8% (control n=36/479) versus 14% (intervention n=75/527) at T and 21% (control n=79/377) versus 24% (intervention n=115/488) at T. ITT analyses indicated that the odds of quitting among screened participants were significantly higher at T (adjusted OR (aOR) 2.38, 95% CI 1.56 to 3.64, p<0.001) and T (aOR 1.60, 95% CI 1.17 to 2.18, p=0.003) compared with control. Intervention participants who needed additional clinical investigation were more likely to quit in the longer term compared with the control group (aOR 2.29, 95% CI 1.62 to 3.22, p=0.007) and those receiving a negative result (aOR 2.43, 95% CI 1.54 to 3.84, p<0.001).
Conclusions: CT lung cancer screening for high-risk participants presents a teachable moment for smoking cessation, especially among those who receive a positive scan result. Further behavioural research is needed to evaluate optimal strategies for integrating smoking cessation intervention with stratified lung cancer screening.
Trial Registration Number: Results, ISRCTN 78513845.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5738533 | PMC |
| http://dx.doi.org/10.1136/thoraxjnl-2016-209690 | DOI Listing |
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