Chunk #21 — Results — Trivariate analysis of MD, RUC and NDC

Source

A population-based twin study of the genetic and environmental relationship of major depression, regular tobacco use and nicotine dependence.

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In both sexes, the genetic correlation between MD and RUC was modest (ra = 0.13 in males and 0.19 in females) but could not be set to zero. The correlation between unique environmental influences on MD and RUC could be removed from the model for males; in females, the environmental correlation was modest (re = 0.12), but significant.