Respiratory Trials·org

Lung cancer · Lung cancer screening

NELSON

Nederlands-Leuvens Longkanker Screenings Onderzoek

NELSON trial design and results
Design Randomised controlled trial
Treatment Volume CT screening at intervals
Control No screening
Population High-risk men and women in the Netherlands and Belgium
Follow-up 10 years
Primary endpoint Lung cancer mortality
Result At 10 years, lung cancer incidence was 5.58 per 1000 person-years in the screening group versus 4.91 in controls, and lung cancer mortality was significantly lower with screening. Average adherence among men was 90.0%. Only 9.2% underwent an additional indeterminate-result CT, and the referral rate for suspicious nodules was 2.1%.
Secondary endpoints Referral rate, stage distribution, all-cause mortality

In this trial involving high-risk persons, lung-cancer mortality was significantly lower among those who underwent volume CT screening than among those who underwent no screening. There were low rates of follow-up procedures for results suggestive of lung cancer.

The trial authors, in the published abstract

How it has aged

The trial that made lung cancer screening deliverable. Comparing against no screening rather than radiography, and using volumetric nodule growth rather than diameter, it cut the referral rate from NLST's 24% of positives to 2.1% — the difference between a programme that overwhelms services and one that does not.

Publications

Reduced Lung-Cancer Mortality with Volume CT Screening in a Randomized Trial

de Koning HJ, van der Aalst CM, de Jong PA, et al. Reduced Lung-Cancer Mortality with Volume CT Screening in a Randomized Trial. N Engl J Med 2020 Feb 6;382(6):503-513.

  • Significant reduction in lung cancer mortality versus no screening
  • Referral rate for suspicious nodules only 2.1%
  • Volumetric nodule assessment rather than diameter thresholds