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. 2023 Apr;55(2):603-617.
doi: 10.4143/crt.2022.307. Epub 2022 Sep 6.

Descriptive Analysis of Gastric Cancer Mortality in Korea, 2000-2020

Tung Hoang  1   2 , Hyeongtaek Woo  1   3 , Sooyoung Cho  1   4 , Jeeyoo Lee  1 , Sayada Zartasha Kazmi  1 , Aesun Shin  1   2   5
Affiliations

Descriptive Analysis of Gastric Cancer Mortality in Korea, 2000-2020

Tung Hoang et al. Cancer Res Treat. 2023 Apr.

Abstract

Purpose: This study aimed to examine secular trends, age-period-cohort effects, and geographical differences in gastric cancer (GC) mortality in Korea.

Materials and methods: Using cause of death data from the Korean Statistical Information Service for GC from 2000 to 2020, we calculated average annual percentage changes (AAPCs) in the age-standardized mortality of GC in 17 cities and provinces through joinpoint regression. Decomposition of age, period, and cohort effects on GC mortality were elucidated by applying a log-linear model and an intrinsic estimate method. Spatial patterns and the degree of spatial clustering in 250 administrative regions were explored via Moran's I statistics. Stratification by sex was performed for all analyses.

Results: The age-standardized mortality of GC per 100,000 persons declined from 29.0 in 2000 to 7.9 in 2020 (AAPC, -6.28%). Age-period-cohort analyses of GC mortality showed a downward trend among five-year age groups from age 20-89 years across five-year periods from 2005-2020 and five-year birth cohorts from 1920-2000. Overall, the younger birth cohort showed lower mortality rates than the older cohort within the same period. In 2020, clusters of high GC mortality were observed in the central area for men (Chungcheongbuk, Jeollabuk, Gyeongsangbuk, and Gyeongsangnam) and in the eastern area for women (Gyeongsangbuk).

Conclusion: This study identified a downward trend in GC mortality among men and women from 2000 to 2020 in Korea. This trend was mainly attributed to birth cohort rather than period effects. Spatial analysis showed high GC mortality in the Chungcheong and Gyeongsangbuk areas.

Keywords: Age-period-cohort analysis; Gastric cancer mortality; Joinpoint regression; Korea; Spatial analysis.

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Conflict of interest statement

Conflicts of Interest

Conflict of interest relevant to this article was not reported.

Figures

Fig. 1
Fig. 1
Trends of age-standardized mortality rates in Korea between 2000 and 2020.
Fig. 2
Fig. 2
Age, period, and birth cohort effects on gastric cancer mortality. (A) Age-specific gastric cancer mortality by period. (B) Age-specific gastric cancer mortality by birth cohort. (C) Period-specific gastric cancer mortality by birth cohort.
Fig. 3
Fig. 3
Model estimates for age-period-cohort effects on gastric cancer mortality.
Fig. 4
Fig. 4
Geographical distribution of age-standardized gastric cancer mortality rates (per 100,000 persons) in Korea, 2020.
Fig. 5
Fig. 5
Local Moran’s I cluster maps for the spatial association of age-standardized gastric cancer mortality rates in Korea, 2020.
See this image and copyright information in PMC

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