Uraujh Yousaf-Khan1, Carlijn van der Aalst1, Pim A de Jong2, Marjolein Heuvelmans3, Ernst Scholten2,4, Joan Walter3, Kristiaan Nackaerts5, Harry Groen6, Rozemarijn Vliegenthart3, Kevin Ten Haaf1, Matthijs Oudkerk3, Harry de Koning1. 1. Department of Public Health, Erasmus Medical Center, University Medical Center Rotterdam, Rotterdam, The Netherlands. 2. Department of Radiology, University Medical Center Utrecht, Utrecht, The Netherlands. 3. University of Groningen, University Medical Center Groningen, Center for Medical Imaging-North East Netherlands, Groningen, The Netherlands. 4. Department of Radiology, Kennemer Gasthuis, Haarlem, The Netherlands. 5. Department of Pulmonary Medicine, KU leuven, University Hospital Leuven, Leuven, Belgium. 6. Department of Pulmonary Diseases, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.
Abstract
BACKGROUND: Debate about the optimal lung cancer screening strategy is ongoing. In this study, previous screening history of the Dutch-Belgian Lung Cancer Screening trial (NELSON) is investigated on if it predicts the screening outcome (test result and lung cancer risk) of the final screening round. METHODS:15 792 participants were randomised (1:1) of which 7900 randomised into a screening group. CT screening took place at baseline, and after 1, 2 and 2.5 years. Initially, three screening outcomes were possible: negative, indeterminate or positive scan result. Probability for screening outcome in the fourth round was calculated for subgroups of participants. RESULTS: Based on results of the first three rounds, three subgroups were identified: (1) those with exclusively negative results (n=3856; 73.0%); (2) those with ≥1 indeterminate result, but never a positive result (n=1342; 25.5%); and (3) with ≥1 positive result (n=81; 1.5%). Group 1 had the highest probability for having a negative scan result in round 4 (97.2% vs 94.8% and 90.1%, respectively, p<0.001), and the lowest risk for detecting lung cancer in round 4 (0.6% vs 1.6%, p=0.001). 'Smoked pack-years' and 'screening history' significantly predicted the fourth round test result. The third round results implied that the risk for detecting lung cancer (after an interval of 2.5 years) was 0.6% for those with negative results compared with 3.7% of those with indeterminate results. CONCLUSIONS: Previous CT lung cancer screening results provides an opportunity for further risk stratifications of those who undergo lung cancer screening. TRIAL REGISTRATION NUMBER: Results, ISRCTN63545820. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/.
RCT Entities:
BACKGROUND: Debate about the optimal lung cancer screening strategy is ongoing. In this study, previous screening history of the Dutch-Belgian Lung Cancer Screening trial (NELSON) is investigated on if it predicts the screening outcome (test result and lung cancer risk) of the final screening round. METHODS: 15 792 participants were randomised (1:1) of which 7900 randomised into a screening group. CT screening took place at baseline, and after 1, 2 and 2.5 years. Initially, three screening outcomes were possible: negative, indeterminate or positive scan result. Probability for screening outcome in the fourth round was calculated for subgroups of participants. RESULTS: Based on results of the first three rounds, three subgroups were identified: (1) those with exclusively negative results (n=3856; 73.0%); (2) those with ≥1 indeterminate result, but never a positive result (n=1342; 25.5%); and (3) with ≥1 positive result (n=81; 1.5%). Group 1 had the highest probability for having a negative scan result in round 4 (97.2% vs 94.8% and 90.1%, respectively, p<0.001), and the lowest risk for detecting lung cancer in round 4 (0.6% vs 1.6%, p=0.001). 'Smoked pack-years' and 'screening history' significantly predicted the fourth round test result. The third round results implied that the risk for detecting lung cancer (after an interval of 2.5 years) was 0.6% for those with negative results compared with 3.7% of those with indeterminate results. CONCLUSIONS: Previous CT lung cancer screening results provides an opportunity for further risk stratifications of those who undergo lung cancer screening. TRIAL REGISTRATION NUMBER: Results, ISRCTN63545820. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/.
Entities:
Keywords:
Clinical Epidemiology; Lung Cancer; Smoking cessation; Tobacco and the lung
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