| Variable | Estimate | P | OR | 95% CI |
|---|---|---|---|---|
| Intercept | 0.6055 | <.0001 | ||
| Exam year (reference: 2006) | ||||
| 2007 | 0.2686 | <.0001 | 1.308 | 1.228–1.394 |
| 2008 | 0.5634 | <.0001 | 1.757 | 1.649–1.871 |
| 2009 | 0.8191 | <.0001 | 2.269 | 2.129–2.417 |
| 2010 | 1.0624 | <.0001 | 2.893 | 2.625–3.190 |
| 2011 | 1.5325 | <.0001 | 4.630 | 4.177–5.131 |
| Age* | −0.0207 | <.0001 | 0.980 | 0.977–0.982 |
| Female (reference: male) | −0.1097 | <.0001 | 0.896 | 0.857–0.938 |
| IMG (reference: non-IMG) | −0.2286 | <.0001 | 0.796 | 0.748–0.846 |
| Type of organization | . | . | . | — |
| Administration | −0.7386 | <.0001 | 0.478 | 0.391–0.584 |
| Educator | 0.4236 | <.0001 | 1.527 | 1.386–1.684 |
| Government | 0.5666 | <.0001 | 1.762 | 1.615–1.923 |
| Group (reference) | ||||
| HMO | 1.7015 | <.0001 | 5.482 | 4.657–6.454 |
| Independent (solo) | −0.7655 | <.0001 | 0.465 | 0.439–0.493 |
| Partnership | −0.2633 | <.0001 | 0.769 | 0.720–0.820 |
| Others | −0.4771 | <.0001 | 0.621 | 0.577–0.668 |
| Rural (reference: urban) | −0.0147 | .6061 | 0.985 | 0.932–1.042 |
| Geographic-HPSAs (reference: non-Geographic HPSA) | −0.1010 | .0191 | 0.904 | 0.831–0.984 |
| MUA/P (reference: non-MUAP) | −0.1413 | <.0001 | 0.868 | 0.822–0.917 |
| Census region | ||||
| Northeast (reference) | — | — | — | — |
| Midwest | −0.0168 | .6186 | 0.983 | 0.920–1.051 |
| South | −0.0134 | .6848 | 0.987 | 0.925–1.053 |
| West | 0.1866 | <.0001 | 1.205 | 1.126–1.290 |
Of the 41,445 total, 606 cases were excluded because of missing values in the independent variables.
↵* Age is treated as a continuous variable in the regression. Correct prediction is 67.5% with a 0.500 cut off (R2 = 0.0927; maximum rescaled R2 = 0.1236; P = .1722, Hosmer and Lemeshow goodness-of-fit test). EHR, electronic health records; HMO, health maintenance organization; HPSA, health professional shortage area; IMG, international medical graduates, MUA/P, medically underserved area/population.