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A pilot one-month follow-up of 17 inpatients diagnosed with both psychiatric and substance abuse disorders showed that 12 patients reported abstinence and five had relapsed. Significant associations were found between reported abstinence and a diagnosis of a depressive disorder, high motivation for abstinence, and the patient's perception that a specific discharge plan for substance abuse treatment had been developed.
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Ries et al. (1990) studied this question.
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