Abstract
Effects of weather variables on suicide are well-documented, but there is still little consistency among the results of most studies. Nevertheless, most studies show a peak in suicides during the spring season, and this is often attributed to increased temperatures. The purpose of this study is to test the relationship between monthly temperature and monthly suicide, independent of months or seasons, for five counties located across the United States. Harmonic analysis shows that four of the five counties display some seasonal components in the suicide data. However, simple linear regression shows no correlation between suicide and temperature, and discriminant analysis shows that monthly departure from mean annual suicide rates is not a useful tool for identifying months with temperatures that are colder or warmer than the annual average. Therefore, it appears that the seasonality of suicides is due to factors other than temperature.
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Breuer HW, Breuer J, Fischbach-Breuer BR (1986) Social, toxicological and meteorological data on suicide attempts. Eur Arch Psychiatry Neurol Sci 235:367–370
Bridges FS, Yip PS, Yang KC (2005) Seasonal changes in suicide in the United States, 1971 to 2000. Percept Motor Skills 100:920–924
Chew KSY, McCleary R (1995) The spring peak in suicides: a cross-national analysis. Social Sci Med 40:223–230
Chiu LPW (1988) Do weather, day of the week, and address affect the rate of attempted suicide in Hong Kong? Soc Psychiatry Psychiatr Epidemiol 23:229–235
Deisenhammer EA (2003) Weather and suicide: the present state of knowledge on the association of meteorological factors with suicidal behaviour. Acta Psychiatr Scand 108:402
Deisenhammer EA (2004) Reply: weather, climate, and suicidality. Acta Psychiatr Scand 109:319–320
Deisenhammer EA, Kemmler G, Parson P (2003) Association of meteorological factors with suicide. Acta Psychiatr Scand 108:455–459
Digon E, Bock HB (1966) Suicides and climatology. Arch Environ Health 12:279–286
Dixon KW, Shulman MD (1983) A statistical investigation into the relationship between meteorological parameters and suicide. Int J Biometeor 27:93–105
Driscoll DM (1971) The relationship between weather and morality in ten major metropolitan areas in the United States, 1962–1965. Int J Biometeor 15:23–29
Gabennesch H (1988) When promises fail: a theory of temporal fluctuations in suicide. Soc Forces 67:129–145
Geltzer AJ, Geltzer AM, Dunford RG, Hampson NB (2000) Effects of weather on incidence of attempted suicide by carbon monoxide poisoning. Undersea Hyperbaric Med 27:9–14
Lambert G, Reid C, Kaye D, Jennings G, Esler M (2003) Increased suicide rate in the middle-aged and its association with hours of sunlight. Am J Psychiatry 160:793–795
Lester D (1986) Suicide and homicide rates: their relationship to latitude and longitude and to the weather. Suicide Life-threatening Behav 16:356–359
Lester D (1999) Climatic data and national suicide and homicide rates. Percept Motor Skills 89:1036
Linkowski P, Martin F, Maertelaer VD (1992) Effect of some climatic factors on violent and non-violent suicides in Belgium. J Affective Disorders 25:161–166
Maes M, Meyer FD, Thompson P, Peeters D, Cosyns P (1994) Synchronised annual rhythms in violent suicide rate, ambient temperature and the light-dark span. Acta Psychiatr Scand 90:191–196
Meares R, Mendelsohn FA, Milgron-Friedman J (1981) A sex difference in the seasonal variation of suicide rate: a single cycle for men, two cycles for women. Brit J Psychiatry 138:321–325
Nayha S (1982) Autumn incidence of suicides re-examined: data from Finland by sex, age and occupation. Br J Psychiatry 141:512–517
Nicholls N, Butler CD, Hanigan I (2006) Inter-annual rainfall variations and suicide in New South Wales, Australia, 1964–2001. Int J Biometeor 50:139–143
Papadopoulos FC, Frangakis CE, Skalkidou A, Petridou E, Stevens RG, Trichopoulos D (2005) Exploring lag and duration effect of sunshine in triggering suicide. J Affective Disorders 88:287–297
Parker G, Walter S (1982) Seasonal variation in depressive disorders and suicidal deaths in new South Wales. Br J Psychiatry 140:626–632
Partonen T, Haukka J, Pirkola S, Isometsä E, Lönnqvist J (2004a) Time patterns and seasonal mismatch in suicide. Acta Psychiatr Scand 109:110–115
Partonen T, Haukkaa J, Nevanlinnab H, Lönnqvista J (2004b) Analysis of the seasonal pattern in suicide. J Affective Disorders 81:133–139
Patz JA, Campbell-Lendrum D, Holloway T, Foley JA (2005) Impact of regional climate change on human health. Nature 438:310–317
Pokorny AD (1966) Suicide and weather. Arch Environ Health 13:225–256
Pokorny AD, Davis F, Harberson W (1963) Suicide, suicide attempts, and weather. Am J Psychiatry 120:377–381
Preti A (1997) The influence of seasonal change on suicidal behaviour in Italy. J Affective Disorders 44:123–130
Preti A, Miotto P (2000) Influence of method on seasonal distribution of attempted suicides in Italy. Neuropsychobiology 41:62–72
Rock D, Greenberg DM, Hallmayer JF (2003) Increasing seasonality of suicide in Australia 1970–1999. Psychiatry Res 120:43–51
Salib E (1997) Elderly suicide and weather conditions: Is there a link? Int J Geriatric Psychiatry 12:937–941
Salib E, Gray N (1997) Weather conditions and fatal self-harm in North Cheshire 1989–1993. Br J Psychiatry 171:473–477
Schory TJ, Piecznski N, Nair S, El-Mallakh RS (2003) Barometric pressure, emergency psychiatric visits, and violent acts. Can J Psychiatry 48:624–627
Sher L (2004) Weather, climate, and suicidality. Acta Psychiatr Scand 109:319
Souêtre E, Salvati E, Belugou JL, Douillet P, Darcourt G (1987) Seasonality of suicides: environmental, sociological and biological covariations. J Affective Disorders 13:215–225
Souêtre E, Wehr TA, Douillet P, Darcourt G (1990) Influence of environmental factors on suicidal behavior. Psychiatry Res 32:253–263
Thorson JA, Kasworm C (1984) Sunshine and suicide: possible influences of climate on behavior. Death Educ 8:125–136
Tietjen GH, Kripke DF (1994) Suicides in California (1968–1977): absence of seasonality in Los Angeles and Sacramento counties. Psychiatry Res 53:161–172
Timmermans S (2005) Suicide determination and the professional authority of medical examiners. Am Sociol Rev 70:311–333
Wang YT, Wang D, Wang XY (1997) Suicide and Meteorological Factors in Huhhot, Inner Mongolia. Crisis 18:115–117
Wilks DS (1995) Statistical methods in the atmospheric sciences. Academic Press. San Diego, CA
Zung W, Green R, Durham N (1974) Seasonal variation of suicide and depression. Arch Gen Psychiatry 30:89–91
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Dixon, P.G., McDonald, A.N., Scheitlin, K.N. et al. Effects of temperature variation on suicide in five U.S. counties, 1991–2001. Int J Biometeorol 51, 395–403 (2007). https://doi.org/10.1007/s00484-006-0081-4
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DOI: https://doi.org/10.1007/s00484-006-0081-4