title: Circannual rhythmicity in the occurrence of idiopathic priapism in north-western India.
abstract: A group of 26 patients who were operated upon for idiopathic priapism between 1972 and 1986 were classified according to the date on which they attended hospital. During the same 15-year period 150 patients with penile cancer were treated and they served as controls. The data were analysed for circannual rhythmicity (365.25 days = 360 degrees and 0 degrees = 22 December. This revealed a significant circannual rhythmicity in the occurrence of idiopathic priapism, with the acrophase located on 2 August. There was a significantly higher incidence of idiopathic priapism between April and September.
authors.affiliation: Department of Urology, Postgraduate Instiute of Medical Education and Research; Department of Statistics, Punjab University, Chandigarh, India.
authors.forename: A K
authors.initials: AK
authors.lastname: Mandal
authors.forename: S
authors.initials: S
authors.lastname: Vaidyanathan
authors.forename: K
authors.initials: K
authors.lastname: Krishan
mesh_terms: D000293:Adolescent; D000328:Adult; D006801:Humans; D007194:India; D008297:Male; D008875:Middle Aged; D010507:Periodicity; D011317:Priapism / Q000453:epidemiology*; D012189:Retrospective Studies