title: Temporal trends in syphilis and gonorrhea incidences in guangdong province, china.
abstract: The high burden of syphilis in China presents a unique opportunity to examine temporal trends. This study used wavelet transformation and Fourier analysis to assess the presence of temporal oscillations in the incidence of syphilis among adults, gonorrhea, and congenital syphilis over 11 years in China's largest province. This study found a significant annual oscillation trend in the incidence of adult syphilis, consistent with a peak during July-September, which was 4-fold higher than the trough, which occurred during January-March. A similar but dampened trend was observed in the incidence of gonorrhea, and no trend was observed for the incidence of congenital syphilis. Further research on the temporal oscillation of the incidence of syphilis is needed.
authors.affiliation: Harvard Institute for Global Health, Cambridge, Massachusetts.
authors.forename: Nicholas X
authors.initials: NX
authors.lastname: Tan
authors.forename: Grace X
authors.initials: GX
authors.lastname: Tan
authors.forename: Li-Gang
authors.initials: LG
authors.lastname: Yang
authors.forename: Bin
authors.initials: B
authors.lastname: Yang
authors.forename: Kimberly A
authors.initials: KA
authors.lastname: Powers
authors.forename: Michael E
authors.initials: ME
authors.lastname: Emch
authors.forename: Joseph D
authors.initials: JD
authors.lastname: Tucker
mesh_terms: D000328:Adult; D002681:China; D005260:Female; D006069:Gonorrhea / Q000453:epidemiology*; D006801:Humans; D015994:Incidence; D008297:Male; D012621:Seasons; D013587:Syphilis / Q000453:epidemiology*
keywords: Fourier transform; disease dynamics; gonorrhea; immunity; oscillation; syphilis; wavelet
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