Current Status of Low-dose CT Screening for Lung Cancer in Ningen Dock of Showa University Northern Yokohama Hospital

Abstract

Objective: We conducted a retrospective observational study of the present status of low-dose CT screening for lung cancer in the Ningen Dock of Showa University Northern Yokohama Hospital.

Methods: We conducted a retrospective investigation of 1,952 people (1,455 men, 497 women) who received low-dose CT screening for lung cancer in the period from April 2009 to March 2019, mainly on cancer screening quality control index including the secondary testing needed rate.

Results: The secondary testing needed rate was 3.8% (75/1,952), result confirmation rate was 60.0% (45/75), number of lung cancers discovered was five (including one cancer of unknown origin), and number of lung cancers excised was three. In addition, the rate for receiving secondary testing was 85.3% (64/75), cancer detection rate was 0.20% (4/1,952), and positive-predictive value for secondary testing was 5.3% (4/75).

Conclusion: Except for the secondary testing needed rate, all rates were higher in comparison with the rates in the national surveillance of lung cancer screening data. In addition, our study demonstrated the usefulness of low-dose CT screening for lung cancer in the Ningen Dock of Showa University Northern Yokohama Hospital.