P S Yip1, A Chao, C W Chiu. 1. Department of Statistics and Actuarial Science, University of Hong Kong, Pokfulam Road, Hong Kong.
Abstract
BACKGROUND: Seasonal variation in suicidal death has been observed in many countries. In particular, a cyclic variation was found for both men and women in England and Wales in the 1960s and 1970s. Men showed a single 12-month cycle whereas women showed two cycles. AIMS: To re-examine the seasonal variation in suicides in England and Wales for the period 1982-1996. METHOD: A harmonic analysis was used to detect the seasonality of the suicide data. RESULTS: The seasonal effect on suicide is greatly diminished in England and Wales. This is shown by the reduced amplitude and smaller proportion of variance accounted for by the season. CONCLUSIONS: The seasonal effect on suicide has either diminished or vanished.
BACKGROUND: Seasonal variation in suicidal death has been observed in many countries. In particular, a cyclic variation was found for both men and women in England and Wales in the 1960s and 1970s. Men showed a single 12-month cycle whereas women showed two cycles. AIMS: To re-examine the seasonal variation in suicides in England and Wales for the period 1982-1996. METHOD: A harmonic analysis was used to detect the seasonality of the suicide data. RESULTS: The seasonal effect on suicide is greatly diminished in England and Wales. This is shown by the reduced amplitude and smaller proportion of variance accounted for by the season. CONCLUSIONS: The seasonal effect on suicide has either diminished or vanished.
Authors: Kimberly A Van Orden; Tracy K Witte; Kelly C Cukrowicz; Scott R Braithwaite; Edward A Selby; Thomas E Joiner Journal: Psychol Rev Date: 2010-04 Impact factor: 8.934
Authors: Ingo W Nader; Jakob Pietschnig; Thomas Niederkrotenthaler; Nestor D Kapusta; Gernot Sonneck; Martin Voracek Journal: PLoS One Date: 2011-02-24 Impact factor: 3.240