Depressives with secondary alcoholism: psychiatric disorders in offspring.

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Abstract
The risk of psychiatric illness among the offspring of probands with major depression and secondary alcoholism was examined. The offspring aged 6-17 (N = 107) and 18 + (N = 171) of probands with major depression (114 with depression only and 19 with secondary alcoholism) were compared with the offspring aged 6-17 (N = 87) and 18 + (N = 103) of controls (N = 82). Offspring of probands with secondary alcoholism had a threefold greater risk of alcoholism and a fivefold greater risk of antisocial personality-conduct disorder compared with offspring of probands with depression only, and a threefold greater risk of alcoholism and a 20-fold greater risk of antisocial personality-conduct disorder compared with offspring of controls. Familial aggregation of alcoholism was observed only among probands with secondary alcoholism. The presence of secondary alcoholism in depressed probands did not convey additional increase in risk of either major depression or anxiety disorders to offspring beyond that observed among offspring of probands with depression only. This suggests that depression and alcoholism are not alternate forms of expression of the same underlying illness. Assortative mating for alcoholism among parents was related to increased risk of both alcoholism and antisocial personality-conduct disorder but not of major depression among offspring. A linear effect on rates of these disorders according to the number of parents with alcoholism was observed.

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