ABSTRACT The objective of this study was to test the hypothesis that a relation exists between slight atmospheric pressure fluctuations (APF) in the far infrasound frequency range and daily number of emergency transport events due to suicidal injuries (EESU). The regression models to compare groups were used to assess the relation of EESU to the mean daily amplitude of APF (APF-A) and to the ratio of APF amplitude averaged over the daytime to the APF amplitude averaged over the nighttime (Rdn). To eliminate the confounding effects of basic meteorological parameters and annual trend in EESU, the non- parametric smoothing method was used in a stepwise manner. The low APF-A (95% CI = 1.06- 1.16 Pa) compared to their common middle levels and the high (95% CI = 3.18-3.64 Pa), as well the low Rdn (СI = 0.83-0.92) and very high Rdn (CI = 3.05-3.77) compared to their more closed to common regular values (СI = 1.69-1.90) turned out to be more beneficial factors promoting the decrease in the incidence of EESU. We suppose that more attention needs to be paid to the meteorotropic effects of APF on certain kinds of psychopathology resulting in suicidal behaviour, and further investigations in different geograph- ical and climatic conditions, especially in those with more intense atmospheric perturbations, are necessary.
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nullDidyk, L. , Gorgo, Y. , Dirckx, J. , Semenova, I. , Didyk, N. and Gorlov, D. (2010) The effects of slight atmospheric pressure fluctuations on the occurrence of emergency transport due to suicidal injuries. Health, 2, 448-453. doi: 10.4236/health.2010.25067.
 Mills, C.A. (1934) Suicides and homicides in their relation to weather changes. The American Journal of Psychiatry, 91(3), 669-677.
 Anderson, A.C. (1982) Environmental factors and aggressive behaviour. Journal of Clinical Psychiatry, 43, 280-283.
 Souêtre, E., Wehr, T.A., Douillet, P. and Darcourt, G. (1990) Influence of environmental factors on suicidal behavior. Psychiatric research, 32(3), 253-263.
 Salib, E. and Gray, N. (1997) Weather conditions and fatal self-harm in North Cheshire 1989-1993. British Journal of Psychiatry, 171, 473-477.
 Deisenhammer, E.A., Kemmler, G. and Parson, P. (2003) Association of meteorological factors with suicide. Acta Psychiatrica Scandinavica, 108(6), 455-459.
 Deisenhammer, E.A. (2003) Weather and suicide: The present state of knowledge on the association of meteorological factors with suicidal behaviour. Acta Psychiatrica Scandinavica, 108(6), 402-409.
 Page, L.A., Hajat, S. and Kovats, R.S. (2007) Relationship between daily suicide counts and temperature in England and Wales. British Journal of Psychiatry, 191(2), 106-112.
 Green, J.E. and Dunn, F. (1968) Correlation of naturally occurring infrasonics and selected human behaviour. Journal of the Acoustical Society of America, 44(5), 1456-1457.
 Vladymirsky, B.M. (1982) The atmospheric infrasound as a possible physical agent transferring solar activity influence to the biosphere. Problemy Kosmicheskoi Biolog- ii, in Russian, 43, 174-179.
 Delyukov, A. and Didyk, L. (1999) The effects of extra-low-frequency atmospheric pressure oscillations on human mental activity. International Journal of Biometeorology, 43(1), 31-37.
 Richner, H. and Graber, W. (1978) The ability of non- classical meteorological parameters to penetrate into buildings. International Journal of Biometeorology, 22 (2), 242-248.
 Didyk, L.A., Gorgo, Y.P., Dirckx, J.J.J., Bogdanov, V.B., Buytaert, J.A.N., Lysenko, V.A., Didyk, N.P., Vershygora, A.V. and Erygina, V.T. (2008) Atmospheric pressure fluctuations in the far infrasound range and emergency transport events coded as circulatory system diseases. International Journal of Biometeorology, 52(7), 553-561.
 Mezernitsky, P.G. (1934) Medical meteorology. Ginásio Integrado Magdalena Kahn group, Yalta-Crimea, in Russian.
 Kompanets, V.S. (1968) The effects of repeated bi-directional changes in barometric pressure on man. Voenno-Medicinsky Zhurnal, 6, 61-63.
 Bedard, A.J. and Georges, T.M. (2000) Atmospheric Infrasound. Physics Today, 53(3), 32-37.
 McNamee, R. (2005) Regression modelling and other methods to control confounding. Occupational and Environmental Medicine, 62(7), 500-506.
 Storlie, C.B. and Helton, J.C. (2005) Multiple predictor smoothing methods for sensitivity analysis. Proceedings of the 37th Winter Simulation Conference, Orlando, 231- 239.
 Woodward, R., Israelsson, H., Bondar, I., McLaughlin, K., Bowman, J.R. and Bass, H. (2005) Understanding wind-generated infrasound noise. Proceedings of the 27th Seismic Research Review: Ground-Based Nuclear Explosion Monitoring Technologies, Rancho Mirage, 866-875.
 Persinger, M.A. (1987) Mental processes and disorders: A neurobehavioral perspective in human biometeorology. Experientia, 43(1), 39-48.
 Barnston, A.G. (1988) The effect of weather on mood, productivity, and frequency of emotional crisis in temperate continental climate. International Journal of Biometeorology, 32(2), 134-143.
 Verhoef, M.J., Rose, M.S. and Ramcharan, S. (1995) The relationship between chinook conditions and women’s physical and mental well-being. International Journal of Biometeorology, 38(3), 148-151.
 Rose, M.S., Verhoef, M.J. and Ramcharan, S. (1995) The relationship between chinook conditions and women’s illness-related behaviours. International Journal of Biometeorology, 38(3), 156-160.
 Petridou, E., Papadopoulos, F., Frangakis, C., Skalkidou, A. and Trichopoules, D. (2002) A role of sunshine in the triggering of suicide. Epidemiology, 13(1), 106-109.
 Wein, A.M., Solovieva, A.D. and Kolosova, O.A. (1990) Autonomic-vascular distonia. Medicine, Moscow, in Russian.
 Chew, K.S. and McCleary, R. (1995) The spring peak in suicides: A cross-national analysis. Social Science & Medicine, 40(2), 223-230.
 Parker, G. and Walter, S. (1982) Seasonal variation in depressive disorders and suicidal deaths in South Wales. British Journal of Psychiatry, 140, 626-632.