The data were tested for temporal smoothness using augmented Dickey–Fuller (ADF) tests and showed a significant trend ( t = −1.905, P = .330) ( Table 1 ), and the autocorrelation and partial autocorrelation of the data series were both trailing ( Figure 6a ).
In summary, the incidence of gonorrhea in China during 2004–2021 showed a decline followed by a rebound, and it was predicted that the number of incident cases would fall slightly in 2022–2023, with an average of 110,000 reported cases per year; the incidence of gonorrhea showed differences in age and regional distribution, and the focus should be on the young population with an obvious trend of increasing incidence and regions with a faster growth rate of the incidence.