Chunk #16 — Methods — Statistical analyses

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A genetic perspective on the proposed inclusion of cannabis withdrawal in DSM-5.

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Note that nonadditive genetic variance (D; including dominant genetic effects and epistasis) can be modeled in place of C, but based on the pattern of twin pair correlations (the DZ twin pair correlations for cannabis withdrawal were greater than half the MZ twin pair correlations), we modeled A, C, and E.