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KMID : 0371020140470040201
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Journal of Preventive Medicine and Public Health
2014 Volume.47 No. 4 p.201 ~ p.205
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Mean Sojourn Time of Preclinical Gastric Cancer in Korean Men: A Retrospective Observational Study
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Bae Jong-Myon
Shin Sang-Yop
Kim Eun-Hee
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Abstract
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Objectives: This retrospective cohort study aimed to estimate the mean sojourn time (MST) of preclinical gastric cancer in Korean men.
Methods: The subjects consisted of voluntary male screenees aged 40 to 69 years who underwent subsequent screening gastroscopies after testing negative at a baseline screening performed between January 2007 and December 2011. A new case was defined if gastric cancer cells were present in the biopsy specimens obtained from gastroscopy. The follow-up period was calculated as the number of person-years between the date of baseline screening gastroscopy and positive findings at a subsequent screening. The MST was calculated using transition rates of gastric cancer to determine the best screening interval.
Results: Of the 171 979 voluntary male screenees, 61 688 (36%) underwent subsequent screening gastroscopies between January 2007 and December 2011. A total of 91 incident cases were found during 19 598 598 person-years of follow-up. The MST of gastric cancer was 2.37 years (95% confidence intervals, 1.92 to 2.96), and those aged 40 to 49 years had a shorter MST than those 50 to 69 years did.
Conclusions: These findings support the 2-year interval of screening recommended by the nationwide gastric cancer screening program in Korea. Further studies for the age-specific MST among women are needed.
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KEYWORD
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Stomach neoplasms, Early detection of cancer, Mass screening, Gastroscopy, Gastrointestinal endoscopy, Korea
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