Table 2. Metabolic capacity phenotype frequency by treatment group.

Gene	Group	Poor	Intermediate	Extensive	Ultrarapid
CYP2D6	Unguided	4	7	10	1
	Guided	1	6	12	3
CYP2C19	Unguided	1	9	12	N/A
	Guided	0	4	18	N/A
CYP1A2	Unguided	0	0	12	10
	Guided	0	0	13	9

Abbreviations: CYP1A2, cytochrome P450 1A2 gene; CYP2C19, cytochrome P450 2C19 gene; CYP2D6, cytochrome P450 2D6 gene.

There were no statistically significant differences for any of these variables between the two groups.