An increasing trend was defined by an AAPC with a 95% CI greater than 0, a decreasing trend by a 95% CI less than 0, and a stable trend if the CI included 0 ( 18 ).
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Comparative analysis of liver cancer burden trends in China and worldwide between 1990 and 2021.
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However, an increasing trend has been observed in regions with historically low incidence rates, such as the United States ( 8 , 9 ), highlighting the need for strengthened prevention and control measures against liver cancer.