Trend dynamics of mumps prevalence among children aged 1-9 years in Changzhou, 2005-2023: a joinpoint regression and age-period-cohort analysis.

With regard to age group, an increasing trend was observed in the younger age group (1–4 years), while a decreasing trend was observed in the older age group (5–9 years).

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The age effect on the prevalence of mumps exhibited a clear trend of increasing from 1 to 6 years of age, followed by a slight decline and then a resurgence at 9 years of age, which was comparable to the prevalence observed at 3 years of age.

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