| CYP450 | Cytochrome P450 enzyme |
| ECU | Ecuador |
| NIC | Nicaragua |
| EUR | European |
| NAT | Native American |
| AFR | African |
| gPM | Poor metabolizer |
| gIM | Intermediate metabolizer |
| gNM | Normal metabolizer |
| gUM | Ultrarapid metabolizer |
| gRM | Rapid metabolizer |
| logMR | Logarithm of the metabolic ratio |