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  MA03 - Lung Cancer Screening - Next Step (ID 896)

  • Event: WCLC 2018
  • Type: Mini Oral Abstract Session
  • Track: Screening and Early Detection
  • Presentations: 1
  • Moderators:
  • Coordinates: 9/24/2018, 10:30 - 12:00, Room 206 AC

  • 25739

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    MA03.03 - Prolonged Low-Dose Computed Tomography (LDCT) Screening Beyond 5 Years Reduces Overall and Lung Cancer Specific Mortality (ID 13227)

    10:40 - 10:45  |  Author(s): Giovanni Corrao
    • Abstract
    • Presentation
    • Slides

    Background
    

    The National Lung Screening Trial (NLST) showed that lung cancer screening (LCS) by low-dose computed tomography (LDCT) improves the overall survival. The NLST and most of the LCS trials were limited to a 5-year period, therefore there is no prospective evidence about the optimal duration of LCS. The aim of this study was to assess the potential benefit of long term LC screening beyond 5 years, notably its effect in 10-year overall and LC specific mortality.

    a9ded1e5ce5d75814730bb4caaf49419 Method
    

    The Multicenter Italian Lung Detection (MILD) trial prospectively enrolled 4,099 participants, randomized to either LDCT arm (n=2,376) or control arm (n=1,723); 38,561 person-years of follow-up were accumulated between 2005 and March 2017. The primary outcomes were 10-year overall and LC specific mortality. Moreover, a Landmark Analysis was used to test the long-term effect of LCS, beyond 5 years (notably by selective exclusion of events that occurred < 5 years). Cumulative mortality were evaluated using Kaplan-Meier estimator and differences among groups were tested using Log-rank test, adjusted for sex, age and pack-years. The prognostic value of assigned arm in predicting mortality was investigated by Cox’s proportional-hazard’s regression adjusted for the above variables.

    4c3880bb027f159e801041b1021e88e8 Result
    

    In the whole 10-year LCS, LDCT arm showed a protective non-statistically significant trend for reduction of overall mortality (HR: 0.82, 95% CI 0.63 to 1.07) and a significant 41% reduced risk of LC mortality (HR 0.59, 95% CI 0.38 to 0.92), compared to the control arm.

    Beyond the 5th year of screening, LDCT arm showed a significant 29% reduction of overall mortality (HR: 0.71, 95% CI 0.50 to 0.99), and a significant 62% reduced risk of LC mortality (HR 0.38, 95% CI 0.20 to 0.74) (Figure 1).

    

    8eea62084ca7e541d918e823422bd82e Conclusion
    

    Prolonged LDCT screening beyond 5 years reduces overall mortality, and it is most beneficial in further reduction of LC specific mortality.

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