Related Experiment Video
Updated: Aug 19, 2026

A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data
Published on: December 9, 2015
Geographical variation in the seasonality of suicide
R Micciolo1, C Zimmermann-Tansella, P Williams
1Cattedra e Servizio di Psicologia Medica, Università di Verona, Italy.
Abstract:
This paper reports the results of a study on the seasonal variation of suicides occurred in Italy during the years 1969-1981. We found evidence for a cyclical pattern with one cycle per year for North/Central as well as for South Italy with no difference between the two parts in the variance explained by it. However, urban regions showed a higher seasonality than the rural parts of Italy, independently of their geographical location. To account for these findings, the hypothesis of a strong seasonal related urban rhythm has been put forward.
Related Concept Videos
Bias in Epidemiological Studies
Survival Curves
The Kaplan-Meier estimator is the most common method for constructing survival curves. This...
Actuarial Approach
Consider the example of a high-risk surgical procedure with significant early-stage mortality. A two-year clinical study is conducted,...
Assumptions of Survival Analysis
Psychological and Sociocultural Causes of Schizophrenia
Depressive Disorders: Etiology
Biological Factors in Depression
Biological predispositions significantly influence the risk of developing depressive disorders. Genetic studies highlight the role of variations in the serotonin transporter...

