Table 4.

Cox proportional hazard ratios for combinations of CYP2D6 metabolizer phenotypes with CYP2C19*2 or CYP2C19*17 genotypes and Disease Free Survival.

Comparison	Hazard Ratio (95% CI); (N)
CYP2C19*2
Level1 3	1.0 (Reference); (85)
Level 2	0.89 (0.46–1.74); (539)
Level 1	0.86 (0.45–1.66); (836)
CYP2C19*17
Level 3	1.0 (Reference); (230)
Level 2	1.21 (0.80–1.85); (1158)
Level 1	1.19 (0.73–1.94); (376)

¹Levels are defined in Table 1.