1. Prior gastroscopy and mortality in patients with gastric cancer: a matched retrospective cohort study 
Wai K. Leung, MD, Hsiu J. Ho, PhD, Jaw-Town Lin, MD, Ming-Shiang Wu, MD, Chun-Ying Wu, MD 
Gastrointestinal Endoscopy 
Volume 87, Issue 1, Pages e3 (January 2018)
DOI: /j.gie
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2. Figure 1
Flow diagram of patient selection.∗ A case could be excluded because of more than 1 criterion. Therefore, the total excluded cases in each step may outnumber the sum of case numbers excluded by individual criteria. <2 Y cohort: receiving endoscopy between 6 months and 2 years before the index date; 2-5 Y cohort: receiving endoscopy more than 2 years and less than or equal to 5 years before the index date; >5 Y cohort: never received endoscopy within the previous 5 years of the index date. GCA, gastric cancer; NHIRD, National Health Insurance Research Database.
Gastrointestinal Endoscopy  , e3DOI: ( /j.gie )
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3. Figure 2
Cumulative incidences of all-cause mortality and gastric cancer–specific mortality in patients with gastric cancer who had prior gastroscopy at different time intervals. A, All-cause mortality. B, Gastric-cancer–specific mortality. Calculation and comparison of cumulative mortalities were conducted by using the Kaplan-Meier method (P < .001 for both all-cause and gastric cancer–specific mortalities when comparing <2 Y versus >5 Y and 2 to 5 Y versus >5 Y cohorts. P value was not significant when we compared <2 Y versus 2 to 5 Y cohorts).
Gastrointestinal Endoscopy  , e3DOI: ( /j.gie )
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4. Supplementary Figure 1
Cumulative incidences of mortality not related to gastric cancer in patients who had prior gastroscopies in different time frames.
Gastrointestinal Endoscopy  , e3DOI: ( /j.gie )
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5. Supplementary Figure 2
Cumulative incidences of all-cause mortality in patients according to different age groups. A, Patients younger than 65 years (log rank; P < .001). B, Patients aged from 65 to 80 years (log rank; P < .001).
Gastrointestinal Endoscopy  , e3DOI: ( /j.gie )
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6. Supplementary Figure 3
Cumulative incidences of all-cause mortality in patients with gastric cancer who had prior gastroscopies in different time frames up to 8 years. The original control cohort was further classified into a 6 to 8–year cohort (between 5 and 8 years) and a >8 years (no endoscopy in previous 8 years) cohort. The 4 groups were again matched in a 1:1:1:4 ratio as described previously (log-rank; P < .001).
Gastrointestinal Endoscopy  , e3DOI: ( /j.gie )
Copyright © 2018 American Society for Gastrointestinal Endoscopy Terms and Conditions