Table 3. Multivariable-Adjusted PCP vs Non-PCP Visit Use Rates by Practice Setting, 1997-2011a.
| Variable | Community-Based Practice [Reference] | Hospital-Based Practice | aOR (95% CI) | P Value for Interaction |
|---|---|---|---|---|
| PCP, No. | 7913 | 7957 | NA | NA |
| Non-PCP, No. | 1870 | 8349 | NA | NA |
| Antibiotics, % | ||||
| PCP | 49.0 | 45.1 | 0.85 (0.70-1.04) | .06b |
| Non-PCP | 50.2 | 55.3 | 1.23 (0.92-1.64) | |
| CT or MRI, % | ||||
| PCP | 6.2 | 7.2 | 1.18 (0.89-1.58) | .07c |
| Non-PCP | 4.1 | 8.8 | 2.27 (1.49-3.44) | |
| Radiographs, % | ||||
| PCP | 9.7 | 11.4 | 1.20 (0.98-1.48) | .08c |
| Non-PCP | 8.5 | 13.7 | 1.70 (1.21-2.39) | |
| Specialty referrals, % | ||||
| PCP | 7.4 | 9.3 | 1.29 (1.05-1.60) | <.001c |
| Non-PCP | 5.5 | 26.1 | 6.10 (4.42-8.42) |
Abbreviations: aOR, adjusted odds ratio; CT, computed tomography; MRI, magnetic resonance imaging; NA, not applicable; PCP, primary care provider.
a
Models are adjusted for age, sex, race/ethnicity, insurance status, symptom acuity, comorbidities, geographic region, and urban location.
b
For interaction between PCP vs non-PCP and hospital-based practice vs community-based practice setting.
c
For interaction between PCP vs non-PCP and hospital-based outpatient practice vs community-based office practice setting.