Table 1. Characteristics of participants in the usability testing.
| Characteristic | Group | Content experts ( n = 12) | End users ( n = 12) |
|---|---|---|---|
| Gender | Female | 6 | 9 |
| Male | 6 | 3 | |
| Age group (y) | 26–39 | 8 | 9 |
| 40–59 | 3 | 2 | |
| 60–74 | 1 | 1 | |
| Current role | Physician | 8 | 6 |
| Pharmacist | 3 | 3 | |
| Nurse | 1 | 2 | |
| Other | 0 | 1 | |
| Years in current role | <5 | 3 | 5 |
| 5–10 | 6 | 3 | |
| 10–15 | 0 | 2 | |
| >15 | 3 | 2 | |
| Activities performed on computer | Median (range) | 5 (3–8) | 5.5 (2–8) |
| Hours/week on computer | 5–15 | 1 | 0 |
| 15–25 | 4 | 4 | |
| 26± | 7 | 8 | |
| Computer platform most often used | Mac | 2 | 3 |
| Windows | 10 | 9 | |
| Browsers used when computing | Median (range) | 1 (1–3) | 2 (2–4) |
| Frequency with which EHR is accessed | Daily | 8 | 11 |
| Weekly | 1 | 0 | |
| Never | 3 | 1 | |
| Frequency with which computerized CDS tools are used | Daily | 1 | 0 |
| Once or twice a week | 2 | 1 | |
| About once a month | 1 | 3 | |
| A couple of times | 4 | 5 | |
| Never | 4 | 3 | |
| Frequency with which TDM is used in clinical decision making | Daily | 0 | 1 |
| Once or twice a week | 3 | 1 | |
| About once a month | 2 | 6 | |
| A couple of times | 1 | 1 | |
| Never | 6 | 1 | |
| Frequency with which PK calculations are applied to patient care | Once or twice a week | 1 | 1 |
| About once a month | 2 | 1 | |
| A couple of times | 2 | 4 | |
| Never | 7 | 6 | |
| Proficiency with PK calculations | Strong | 3 | 0 |
| Moderate | 8 | 3 | |
| Weak | 1 | 6 | |
| Not proficient at all | 0 | 3 |
Abbreviations: CDS, clinical decision support; EHR, electronic health record; PK, pharmacokinetics; TDM, therapeutic drug monitoring.