an increasing trendP < 0.01
Time Trends and Subgroups of CHD The overall incidence of CHD increased from 10.29‰ (2206/214333) in 2018 to 13.45‰ (2,174/161,605) in 2020, revealing an increasing trend of 30.7% [overall: χ 2 = 50.13, P < 0.01; 2018 vs. 2019: χ 2 = 4.94, P < 0.05); 2019 vs. 2020: χ 2 = 23.24, P < 0.01; 2018 vs. 2020 (χ 2 = 47.75, P < 0.01)].