| ETS | Environmental Tobacco Smoke |
| ADHD | Attention Deficit Hyperactivity Disorder |
| DOHaD | Developmental Origins of Health and Disease |
| DAGs | Directed Acyclic Graphs |
| COR | Crude Odds Ratio |
| AOR | Adjusted Odds Ratio |
| ETS | Environmental Tobacco Smoke |
| ADHD | Attention Deficit Hyperactivity Disorder |
| DOHaD | Developmental Origins of Health and Disease |
| DAGs | Directed Acyclic Graphs |
| COR | Crude Odds Ratio |
| AOR | Adjusted Odds Ratio |