Table 1.
Three Types of Friend Influence | Data Used | Level of Expressed Genetic Contribution to Alcohol use or estimated h2 |
---|---|---|
Concordant-High on Drinking | MZ, same-sex DZ twins, & same-sex full siblings | Baseline |
Concordant-Low on Drinking | MZ, same-sex DZ twins, & same-sex full siblings | Lower |
Discordant Drinking | MZ, same-sex DZ twins, & same-sex full siblings | Lower |