a decreasing trendp < 0.05
The results of the Joinpoint regression analyses showed a decreasing trend in prevalence between 1990 and 2019 in the <5 years age group [AAPC: −0.29% (95% CI: −0.32% to −0.25%), p < 0.05], with the most pronounced decrease between 2006 and 2019 [APC: −0.76% (−1.00% to −0.52%), p < 0.05].