4.6 Article

Secular decreasing trends in gastric cancer incidence in Taiwan: A population-based cancer registry study

Journal

WORLD JOURNAL OF GASTROENTEROLOGY
Volume 27, Issue 34, Pages -

Publisher

BAISHIDENG PUBLISHING GROUP INC
DOI: 10.3748/wjg.v27.i34.5764

Keywords

Gastric cancer; Population-based study; Taiwan Cancer Registry; Sex difference; Helicobacter pylori; Helicobacter pylori eradication

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In Taiwan, there is a continuous decreasing trend in gastric cancer incidence with differential sex ratios. The incidence rates of gastric cancer increase with age. The increasing number of patients being treated with antibiotic therapy for H. pylori infection in recent years is associated with a substantial decrease in age-adjusted incidence rates.
BACKGROUND Gastric cancer remains a leading cause of cancer death worldwide. In Taiwan, gastric cancer is the sixth leading cause of cancer mortality in both males and females. AIM To evaluate secular trends in gastric cancer incidence according to age, sex, and Helicobacter pylori (H. pylori) treatment in Taiwan. METHODS In this population-based study, we used the national Taiwan Cancer Registry database. Annual percent changes in incidence rates were used to describe secular trends in incidence rates and sex ratios of gastric cancer in Taiwan. Pearson's product-moment correlation coefficients were used to analyze the correlation between annual age-adjusted incidence rates and the annual number of patients treated with antibiotic therapy for H. pylori infection. RESULTS The annual percent changes showed continuously decreasing rates of gastric cancer among both males and females. However, the decreasing trends differed by sex, with an annual percent change of -2.58% in males and -2.14% in females. The age-specific incidence rates increased with age. Within the same age group, more recent time periods showed lower incidence rates than greater time periods. Similarly, the sex ratio was lower in later birth cohorts than in earlier birth cohorts. Age-adjusted incidence rates substantially decreased with increasing numbers of patients being treated with antibiotic therapy for H. pylori infection during 2005 to 2016 (r = 0.72). CONCLUSION We observed steadily decreasing trends with differential sex ratios in the incidence of gastric cancer in Taiwan. These results support H. pylori eradication programs in Taiwan.

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