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A Shifting Seasonality of Schizophrenic Births

  • E. Fuller Torrey (a1) and Barbara Boyle Torrey (a2)


In view of recent findings in Japan, and in England and Wales, data on schizophrenic births in the United States were reexamined to see if seasonal shifts had occurred. In Missouri a progressive shift from February to April and May was noted between 1921 and 1930 and between 1941 and 1950. In five New England states there was no shift over the same period. Data were then obtained to compare the Missouri shift with two hypotheses previously put forward to explain schizophrenic birth seasonality: (1) that it is related to the seasonality of general births, and (2) that it is related to seasonal temperature variation. Neither hypothesis was supported by the data.



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Cowgill, U. M. (1966) Season of birth in man. Contemporary situation with special reference to Europe and the Southern Hemisphere. Ecology, 47, 614–23.
Dalén, P. (1968) Month of birth and schizophrenia. Acta Psychiatrica Scandinavica, Supplementum, 203, 5560.
Dalén, P. (1974) Season of Birth in Schizophrenia and other Mental Disorders. Göteborg: University of Göteborg.
Diebold, K. (1975) The relationship between month of birth and psychic disorder. Fortschritte der Neurologie, Psychiatrie und ihrer Grenzgebiete, 43, 7181.
Hare, E. H. (1975) Manic-depressive psychosis and season of birth. Acta Psychiatrica Scandinavica, 52, 6979.
Hare, E. H. (1978) Variations in the seasonal distribution of births of psychotic patients in England and Wales. British Journal of Psychiatry, 132, 155–8.
Hare, E. H. & Price, J. S. (1968) Mental disorder and season of birth: comparison of psychoses with neuroses. British Journal of Psychiatry, 115, 533–40.
Hare, E. H., Price, J. S. & Slater, E. (1974) Mental disorder and season of birth. British Journal of Psychiatry, 124, 81–6.
Jongbloet, P. H. (1971) Month of birth and gametopathy. Clinica Genetica, 2, 315–30.
Ödegård, Ö. (1974) Season of birth in the general population and in patients with mental disorder in Norway. British Journal of Psychiatry, 125, 397405.
Ödegård, Ö. (1977) Season of birth in the population of Norway, with particular reference to the September birth maximum. British Journal of Psychiatry, 131, 339–44.
Parker, G. & Balza, B. (1977) Season of birth and schizophrenia—an equatorial study. Acta Psychiatrica Scandinavica, 56, 143–6.
Parker, G. & Neilson, M. (1976) Mental disorder and season of birth—a southern hemisphere study. British Journal of Psychiatry, 129, 355–61.
Pasamanick, B. & Knobloch, H. (1961) Epidemiologic studies on the complications of pregnancy and the birth process. In Caplan, G. (ed.) Prevention of Mental Disorders in Children. New York: Basic Books.
Petersen, W. F. (1934) The Patient and the Weather: Mental and Nervous Diseases. Ann Arbor: Edwards.
Shimura, M., Nakamura, I. & Miura, T. (1977) Season of birth of schizophrenics in Tokyo, Japan. Acta Psychiatrica Scandinavica, 55, 225–32.
Torrey, E. F. (1978) Schizophrenic births. Letter to the Editor. Lancet, 1, 882.
Torrey, E. F., Torrey, B. B. & Peterson, M. R. (1977) Seasonality of schizophrenic births in the U.S. Archives of General Psychiatry, 34, 1065–70.
Videbech, T. H., Weeke, A. & Dupont, A. (1974) Endogenous psychoses and season of birth. Acta Psychiatrica Scandinavica, 50, 202–18.

A Shifting Seasonality of Schizophrenic Births

  • E. Fuller Torrey (a1) and Barbara Boyle Torrey (a2)


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A Shifting Seasonality of Schizophrenic Births

  • E. Fuller Torrey (a1) and Barbara Boyle Torrey (a2)
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