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Birth Order and Family Size: Bias Caused by Changes in Birth Rate

Published online by Cambridge University Press:  29 January 2018

E. H. Hare  and
J. S. Price
E. H. Hare
Affiliation:
Bethlem Royal and Maudsley Hospitals, London, S.E.5
J. S. Price
Affiliation:
Medical Research Council Psychiatric Genetics Unit, Institute of Psychiatry, London, S.E.5
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Extract

In a previous paper (Price and Hare, 1969) we drew attention to some types of bias which may complicate the search for a useful association between disease and birth order. In particular, we considered biases occurring in a sample of adult patients where the patients' mothers have all passed their reproductive period and where, therefore, the sibships of the patients are complete. In such a sample, the recognized methods of searching for an association between disease and birth order are based on the assumption, that, for a null hypothesis, the sample will be randomly distributed among the birth ranks for each sibship size. But in fact the distribution may be non-random, and there are two main causes for this. These are (i) changes in the birth rate of the population, and (ii) changes in the birth rank distribution of the patients between birth and the age-range from which the sample is selected (e.g. differential rates of mortality or migration). The principal aim in the present paper is to illustrate the bias arising from the first of these causes.

Type
Birth Order
Information
The British Journal of Psychiatry , Volume 115 , Issue 523 , June 1969 , pp. 647 - 657
Copyright
Copyright © Royal College of Psychiatrists, 1969 

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References

Gregory, I. (1958). “An analysis of familial data on psychiatric patients: parental age, family size, birth order and ordinal position.” Brit. J. prev. soc. Med., 12, 42–59.Google Scholar
Gregory, I. (1959). “An analysis of family data on 1,000 patients admitted to a Canadian mental hospital.” Acta genet. stat. med., 9, 54–96.Google Scholar
Greenwood, M., and Yule, G. U. (1914). “On the determination of size of family and of distribution of characters in order of birth from samples taken thro members of sibships.” J. Roy. stat. Soc., 77, 179–199.Google Scholar
Hare, E. H. (ed.). (1968). Triennial Statistical Report of the Bethlem Royal Hospital and the Maudsley Hospital, Years 1964–66 (Table 2.8). London.Google Scholar
Loxton, G. E. (1962). “Birth rank and maternal age.” Lancet, i, 271.Google Scholar
Malzberg, B. (1940). “Social and Biological Aspects of Disease.” New York: State Hospitals Press.Google Scholar
Norton, A. (1952). “Incidence of neurosis related to maternal age and birth order.” Brit. J. prev. soc. Med., 6, 253–258.Google Scholar
Price, J. S. (1969). “Comparison of 609 pairs of adult brothers and sisters by their parents. A study of personality differences within the family.” J. biosoc. Sci. (In the press.)Google Scholar
Price, J. S. and Hare, E. H. (1969). “Birth order studies: some sources of bias.” Brit. J. Psychiat., 115, 633–646.Google Scholar
Registrar-General. (1964). Census 1961, England and Wales: Age, Marital Condition and General Tables. London: H.M.S.O. Google Scholar
Registrar-General. (1963). Statistical Report for the Tear 1961, England and Wales. London: H.M.S.O. Google Scholar
Tsuang, M. (1966). “Birth order and maternal age of psychiatric in-patients.” Brit. J. Psychiat., 112, 1131–1141.Google Scholar
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