Interestingly, all age subgroups of males in high‐middle, middle, and low‐middle SDI regions indicated an increasing trend (Figure 4B ).
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Global Burden, Trends, and Inequalities of Gallbladder and Biliary Tract Cancer, 1990-2021: A Decomposition and Age-Period-Cohort Analysis.
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Regarding the period effect, the past 30 years have seen a negative trend globally, except for low and low‐middle SDI regions.
The average annual percent change (AAPC) was also computed to provide an overall trend estimate from 1990 to 2021.
With the 1917 year as the watershed, the birth cohort effect exhibits a decreasing trend for individuals born in the following periods.