Age-period-cohort analysis of gallbladder and biliary diseases epidemiological trends from 1990 to 2021 and forecasts for 2035: a systematic analysis from the global burden of disease study 2021.

Background: Gallbladder and biliary diseases (GABD) represent prevalent disorders of the digestive system.

Methods: Data on age-standardized incidence rate (ASIR), age-standardized mortality rate (ASMR), and age-standardized disability-adjusted life years (DALYs) rate (ASDR) were extracted from the Global Burden of Disease (GBD) 2021 study. The estimated annual percentage change (EAPC) was utilized to quantify temporal trends in GABD.

[Variation characteristics and influencing factors of air pollution index in China].

Based on the daily air pollution index (API), primary pollutant, air quality level and status of 42 cities in China during 2001-2010, the characteristics of air quality were analyzed. The results showed that the atmosphere was significantly influenced by consumption of coal. The primary pollutant was PM10, and the air quality status was excellent (0 < API < 50), good (50 < API <100) and slightly polluted (100 < API < 150) in the majority.