Chunk #19 — Results — Twin model fitting

Source: Evidence for multiple genetic factors underlying the DSM-IV criteria for alcohol dependence.
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Working from model 6, we then tested, in #10, 11 and 12 with, respectively, a second genetic, shared environmental and unique environmental common factor. Of those three models, #10 fits the best by AIC by a wide margin, suggesting the existence of multiple genetic factors for the AD criteria.