Abstract
Numerous studies have reported that admission rates in patients with affective disorders are subject to seasonal variation. Notwithstanding, there has been limited evaluation of the degree to which changeable daily meteorological patterns influence affective disorder admission rates. A handful of small studies have alluded to a potential link between psychiatric admission rates and meteorological variables such as environmental temperature (heat waves in particular), wind direction and sunshine. We used the Kruskal-Wallis test, ARIMA and time-series regression analyses to examine whether daily meteorological variables—namely wind speed and direction, barometric pressure, rainfall, hours of sunshine, sunlight radiation and temperature—influence admission rates for mania and depression across 12 regions in Ireland over a 31-year period. Although we found some very weak but interesting trends for barometric pressure in relation to mania admissions, daily meteorological patterns did not appear to affect hospital admissions overall for mania or depression. Our results do not support the small number of papers to date that suggest a link between daily meteorological variables and affective disorder admissions. Further study is needed.
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The authors would like to thank the Health Research Board of Ireland and Met Eireann for supplying the data used in this study.
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McWilliams, S., Kinsella, A. & O’Callaghan, E. Daily weather variables and affective disorder admissions to psychiatric hospitals. Int J Biometeorol 58, 2045–2057 (2014). https://doi.org/10.1007/s00484-014-0805-9
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DOI: https://doi.org/10.1007/s00484-014-0805-9