Virtual Library

 x 
My Library Virtual Library FAQ

Start Your Search

M. Sagawa



Author of

  • +

    MA 14 - Diagnostic Radiology, Staging and Screening for Lung Cancer I (ID 672)

    • Event: WCLC 2017
    • Type: Mini Oral
    • Track: Radiology/Staging/Screening
    • Presentations: 1
    • +

      MA 14.06 - Population Based Cohort Study to Evaluate Lung Cancer Screening Using Low Dose CT in Hitachi City (ID 8087)

      16:20 - 16:25  |  Author(s): M. Sagawa

      • Abstract
      • Presentation
      • Slides

      Background:
      In 1998, low-dose CT screening for lung cancer was introduced in Hitachi City, Japan. Based on time trend analysis, a significant reduction in lung cancer mortality was observed 4–8 years after introduction of CT screening.

      Method:
      To evaluate the effectiveness of lung cancer screening, we conducted a cohort study for CT screening participants and X-ray screening participants among Hitachi residents. Citizens aged 50 to 75 who underwent CT screening from 1998-2006 were defined as the CT group, and those who underwent X-ray screening during the same period, but did not receive CT screening throughout the follow-up period were defined as the X-ray group. We investigated lung cancer mortality and all-cause mortality of both groups from the first lung cancer screening of the subject to the end of 2012 using residence registry, the regional cancer registry, and national death statistics.

      Result:
      From the CT group (17,935 cases, 9,790 men and 8,145 women), 273 cases of lung cancer (1.5%), 72 cases of lung cancer death (0.4%), and 885 cases of all-cause mortality (4.9%) were observed. On the other hand, 164 cases (1.1%) of lung cancer, 80 cases (0.5%) of lung cancer death, and 1,188 cases (7.6%) of all-cause mortality were observed in the X-ray group (15,548 cases, 6,526 men and 9,022 women). The hazard ratios of the CT group to the X-ray group adjusted for sex, age, and smoking history were 0.49 for lung cancer mortality and 0.57 for all-cause mortality.

      Conclusion:
      Low dose CT screening participants exhibited a 51% reduction in lung cancer mortality during the observation period compared with the X-ray group. Although all-cause mortality also decreased by 43% in the CT group, the decrease in proportion of lung cancer deaths was greater.

      Only Members that have purchased this event or have registered via an access code will be able to view this content. To view this presentation, please login, select "Add to Cart" and proceed to checkout. If you would like to become a member of IASLC, please click here.

      Only Active Members that have purchased this event or have registered via an access code will be able to view this content. To view this presentation, please login or select "Add to Cart" and proceed to checkout.