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Open AccessArticle

Seasonal Differences in the Day-of-the-Week Pattern of Suicide in Queensland, Australia

Australian Institute for Suicide Research and Prevention, National Centre of Excellence in Suicide Prevention, WHO Collaborating Centre for Research and Training in Suicide Prevention, Mt Gravatt Campus, Griffith University, Queensland 4122, Australia
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Int. J. Environ. Res. Public Health 2013, 10(7), 2825-2833; https://doi.org/10.3390/ijerph10072825
Received: 20 May 2013 / Revised: 18 June 2013 / Accepted: 21 June 2013 / Published: 8 July 2013
Various temporal patterns of suicide events, according to time of day, day of week, month and season, have been identified. However, whether different dimensions of time interact has not been investigated. Using suicide data from Queensland, Australia, this study aims to verify if there is an interaction effect between seasonal and day-of-the-week distribution. Computerized suicide data from the Queensland Suicide Register for those aged 15+ years were analyzed according to date of death, age, sex and geographic location for the period 1996–2007. To examine seasonal differences in day-of-the-week pattern of suicide, Poisson regressions were used. A total of 6,555 suicides were recorded over the whole study period. Regardless of the season, male residents of Brisbane had a significantly marked day-of-the-week pattern of suicide, with higher rates between Mondays and Thursdays. When seasonal differences were considered, male residents in Brisbane showed a Monday peak in summer and a wave-shape pattern with a peak on Thursday and a nadir on Saturdays in winter. Whilst males have distinctive peaks in terms of days of the week for summer and winter, females do not show similar patterns. View Full-Text
Keywords: day of the week; season; temporal variation; suicide; Australia; Queensland day of the week; season; temporal variation; suicide; Australia; Queensland
MDPI and ACS Style

Law, C.-K.; De Leo, D. Seasonal Differences in the Day-of-the-Week Pattern of Suicide in Queensland, Australia. Int. J. Environ. Res. Public Health 2013, 10, 2825-2833.

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