Table 1.
Patient Characteristics (n=263)
| Age | |
| Median (years) | 64 |
| Range (years) | 19–86 |
| Sex | No. (%) |
| Female | 124 (47.1) |
| Male | 139 (52.9) |
| Weight | |
| Median (kg) | 80.4 |
| Range (kg) | 38–165.8 |
| Self-declared race | No. (%) |
| Native American | 1 (0.4) |
| Asian | 8 (3) |
| Other | 13 (5) |
| Black | 15 (5.7) |
| Unknown | 26 (9.9) |
| White | 200 (76) |
| Reason for CYP2C19 genotyping | No. (%) |
| Admitted to hospital for diagnosis workup | 3 (1.1) |
| Ambulatory management | 17 (6.5) |
| Admitted to hospital for febrile neutropenia | 20 (7.6) |
| Admitted to hospital to receive chemotherapy | 223 (84.8) |
| CYP2C19 genotyping turnaround time | |
| Median (days) | 3 |
| Range (days) | 0–12 |
| CYP2C19 genotypes/phenotypes | No. (%) |
| CYP2C19*17/*17‒ultrarapid metabolizer | 5 (1.9) |
| CYP2C19*1/*17‒rapid metabolizer | 74 (28.1) |
| CYP2C19*1/*1‒normal metabolizer | 105 (39.9) |
| CYP2C19*2/*17‒intermediate metabolizer | 23 (8.7) |
| CYP2C19*1/*2‒intermediate metabolizer | 49 (18.6) |
| CYP2C19*2/*2‒poor metabolizer | 7 (2.7) |
| CYP2C19 allele frequencies | No. (%) |
| CYP2C19*1 | 333 (63.3) |
| CYP2C19*17 | 107 (20.3) |
| CYP2C19*2 | 86 (16.4) |