Table 2.
The Association between Pregnancy and Drug Abuse assessed by an Odds Ratios in the General Population and in Cousins, Siblings and Monozygotic Twins Discordant for Pregnancy as Estimated from our Co-Relative Model
| Sample | Estimated Odds Ratios | 95% Confidence Intervals |
|---|---|---|
| Population | 0.66 | 0.60–0.72 |
| Discordant Cousins | 0.56 | 0.51–0.61 |
| Discordant Siblings | 0.37 | 0.25–0.45 |
| Discordant Monozygotic Twins | 0.17 | 0.10–0.31 |
| AIC* (Observed) | 660440.34 | |
| AIC* (Predicted) | 660438.78 |
*
Akaike’s information criterion (26)