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Updated: Sep 28, 2026

A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data
Published on: December 9, 2015
[Seasonal variations in sudden death in sports clubs]
H J Koch1, C Raschka, M Parzeller
1Psychiatrischen Universitätsklinik am Bezirksklinikum Regensburg.
Abstract:
2,825 cases of sudden deaths (2,669 men, 156 women) in sports-clubs between 1981 and 1999 were evaluated retrospectively by means of the cosinor method in order to detect a circannual distribution of occurrence. Deaths due to cardiovascular and traumatic events were additionally studied with regard to seasonal differences of frequency. The number of sudden deaths per month during a period of 19 years could be significantly fitted to a cosine model with a maximum in June, the absolute maximum value being observed in May (n = 317). In particular, accidents were more frequently found in spring and summer.
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