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  • Title: Testing hypotheses regarding the causes of comorbidity: examining the underlying deficits of comorbid disorders.
    Author: Rhee SH, Hewitt JK, Corley RP, Willcutt EG, Pennington BF.
    Journal: J Abnorm Psychol; 2005 Aug; 114(3):346-62. PubMed ID: 16117572.
    Abstract:
    The authors examined the validity of a method commonly used to test alternative hypotheses regarding the causes of comorbidity: the examination of underlying deficits of comorbid disorders. The authors simulated data in which the true causes of comorbidity were known, then compared the patterns of underlying deficits of the comorbid disorders found in the simulated data with the predicted results. The method of examining the underlying deficits of comorbid disorders could distinguish between several comorbidity models, including those that could not be distinguished well using other methods. The ability to distinguish the correct model decreased as the sample size and the correlation between the underlying deficits and the symptom scores decreased, suggesting that the issue of power should be considered carefully.
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