Relationship between Physician and Practice Characteristics and EHR Usage in 2007 (abbreviated; full table available as online data supplement)
| Characteristic | 2007 High Users∗ (%) | 2007 Low Users∗ (%) | Adjusted OR† (95% CI) |
| Male sex | 64 | 67 | 0.98 (0.56–1.74) |
| Years since medical school | 0.98 (0.68–1.41) | ||
| <10 yrs | 2.8 | 2.3 | |
| 10–19 yrs | 47 | 40 | |
| 20–29 yrs | 29 | 33 | |
| 30+ yrs | 21 | 26 | |
| Primary Care‡ | 44 | 31 | 1.33 (0.72–2.46) |
| Number of physicians in office | 1.11 (0.82–1.50) | ||
| 1 | 13 | 20 | |
| 2–3 | 21 | 26 | |
| 4–6 | 25 | 19 | |
| 7+ | 41 | 36 | |
| Practice has NPs/PAs§ | 63 | 48 | 1.44 (0.70–2.95) |
| Owner of practice | 1.13 (0.81–1.57) | ||
| Full-owner | 22 | 31 | |
| Part-owner | 20 | 21 | |
| Not-owner | 47 | 48 | |
| Number of outpatient offices | 1.08 (0.66–1.74) | ||
| 1 | 73 | 69 | |
| 2 | 22 | 27 | |
| 3+ | 5.3 | 4.7 | |
| Number of outpatient visits per week | 1.08 (0.66–1.74) | ||
| <50 | 30 | 38 | |
| 50–99 | 42 | 40 | |
| 100+ | 29 | 22 | |
| Practice has students or residents | 64 | 58 | 1.28 (0.70–2.33) |
| Subject to incentives for HIT adoption | 44 | 29 | 1.30 (0.65–2.61) |
| Subject to incentives for HIT usage | 35 | 24 | 1.44 (0.70–2.95) |
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EHR = electronic health record; OR = odds ratio; CI = confidence interval; HIT = health information technology.
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↵∗ High users and low users of EHRs are defined in the text.
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↵† Results from logistic regression model adjusting for all available physician and practice covariates.
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↵‡ Includes internal medicine, family medicine, pediatrics, geriatrics.
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↵§ NPs/PAs indicates nurse practitioners and/or physician assistants.
