Optimal Interval for Repeated Gastric Cancer Screening in Normal-Risk Healthy Korean Adults: A Retrospective Cohort Study
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초록
Purpose This retrospective cohort study was conducted to estimate the optimal interval for gastriccancer screening in Korean adults with initial negative screening results. Materials and MethodsThis study consisted of voluntary Korean screenees aged 40 to 69 years who underwentsubsequent screening gastroscopies after testing negative in the baseline screeningperformed between January 2007 and December 2011. A new case was defined as thepresence of gastric cancer cells in biopsy specimens obtained upon gastroscopy. Thefollow-up periods were calculated during the months between the date of baseline screeninggastroscopy and positive findings upon subsequent screenings, stratified by sex and agegroup. The mean sojourn time (MST) for determining the screening interval was estimatedusing the prevalence/incidence ratio. ResultsOf the 293,520 voluntary screenees for the gastric cancer screening program, 91,850(31.29%) underwent subsequent screening gastroscopies between January 2007 andDecember 2011. The MSTs in men and women were 21.67 months (95% confidenceintervals [CI], 17.64 to 26.88 months) and 15.14 months (95% CI, 9.44 to 25.85 months),respectively. ConclusionThese findings suggest that the optimal interval for subsequent gastric screening in bothmen and women is 24 months, supporting the 2-year interval recommended by the nationwidegastric cancer screening program.
Abstract
Purpose This retrospective cohort study was conducted to estimate the optimal interval for gastriccancer screening in Korean adults with initial negative screening results. Materials and MethodsThis study consisted of voluntary Korean screenees aged 40 to 69 years who underwentsubsequent screening gastroscopies after testing negative in the baseline screeningperformed between January 2007 and December 2011. A new case was defined as thepresence of gastric cancer cells in biopsy specimens obtained upon gastroscopy. Thefollow-up periods were calculated during the months between the date of baseline screeninggastroscopy and positive findings upon subsequent screenings, stratified by sex and agegroup. The mean sojourn time (MST) for determining the screening interval was estimatedusing the prevalence/incidence ratio. ResultsOf the 293,520 voluntary screenees for the gastric cancer screening program, 91,850(31.29%) underwent subsequent screening gastroscopies between January 2007 andDecember 2011. The MSTs in men and women were 21.67 months (95% confidenceintervals [CI], 17.64 to 26.88 months) and 15.14 months (95% CI, 9.44 to 25.85 months),respectively. ConclusionThese findings suggest that the optimal interval for subsequent gastric screening in bothmen and women is 24 months, supporting the 2-year interval recommended by the nationwidegastric cancer screening program.
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