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. Author manuscript; available in PMC: 2020 Jan 1.
Published in final edited form as: JAMA Psychiatry. 2019 Jan 1;76(1):87–94. doi: 10.1001/jamapsychiatry.2018.2546

Table 2.

Estimation of Genetic and Environmental Correlation

Phenotypic Correlation (rP) Genetic Correlation (rg) Environmental Correlation (re)
Trait rP % rP
Due to A		 % rP
Due to E		 rg
lower CI
upper CI		 re
lower CI
upper CI
Frequent Cannabis Use 0.33 69.2% 30.8% 0.42 0.11 0.83 0.20 0.05 0.33
CUD 0.28 84.1% 15.9% 0.41 0.23 0.71 0.11 −0.03 0.25
Current Cannabis Use 0.36 80.9% 19.1% 0.56 0.23 1.00 0.06 −0.07 1.00

Abbreviations: % rP Due to A=proportion of the phenotypic correlation attributable to genetic factors; % rP Due to E= proportion of the phenotypic correlation attributable to environmental factors; CI=95% Confidence Interval; CUD=cannabis abuse/dependence.