highly significantp<0.001
The total number of cases in each solar term across the two years was summed, and a chi-square test revealed a highly significant nonuniform distribution of cases across the solar terms (p<0.001).This study employs time series decomposition to break down the disease incidence sequence into three core components: the long-term trend component (T t , reflecting the baseline changes in incidence), the seasonal component (S t , characterizing the periodic fluctuations of the solar terms), and the residual component (R t , random noise).