FIGURE 1.

Distributions of (a) M444‐, (b) M414‐, and (c) M416‐to‐solanidine metabolic ratios in NFIB C (red dots) versus TT carriers (black dots) among various CYP2D6 phenotype subgroups. The two blue‐square dots represent the two homozygous NFIB C carriers detected in the population. Horizontal lines represent mean values of the respective metabolic ratios (±95% confidence interval). Statistical analyses were performed by Student's t‐test comparing NFIB C versus TT carriers within each CYP2D6 phenotype subgroups. IM intermediate metabolizers; NM, normal metabolizers; PM, poor metabolizers; UM, ultra‐rapid metabolizers.