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There have been many reports of the high incidence of early parental loss among groups of patients suffering from various psycho-pathological disorders. Bowlby (1951) cited numerous relevant studies in his influential monograph, and Gregory (1958) has critically reviewed a dozen others. More recently Brown (1961) reported a significantly higher incidence of parental loss in childhood among depressed patients than among the general population, and Beck et al . (1963) found that the incidence among highly depressed psychiatric patients was higher than among non-depressed patients. Both these writers aver that their findings provide evidence that parental loss in childhood is a significant factor in the development of a depressive illness in adult life.
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Hopkinson et al. (1966) studied this question.
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