Table 3.
Poisson Multivariable Regression Analysis of Inpatient Admission Rate (N=385)
| Variable | Rate Ratio | 95% CI | P | |
|---|---|---|---|---|
| Physician FTE % on care team | 0.894 | 0.746 | 1.072 | .23 |
| Physician (NP/PA reference) | 0.976 | 0.882 | 1.081 | .65 |
| Female sex | 0.963 | 0.894 | 1.038 | .32 |
| Region A | Reference | |||
| Region B | 0.664 | 0.583 | 0.755 | <.001 |
| Region C | 0.617 | 0.536 | 0.709 | <.001 |
| Region D | 0.671 | 0.580 | 0.775 | <.001 |
| Region E | 0.718 | 0.621 | 0.831 | <.001 |
| Years in practice | 0.991 | 0.987 | 0.995 | <.001 |
| Patient satisfaction: % top box | 0.848 | 0.511 | 1.417 | .53 |
| Panel complexity score: HCC | 12.8 | 9.40 | 17.4 | <.001 |
| Rural site (urban reference) | 0.911 | 0.826 | 1.006 | 0.07 |
The offset variable was the natural logarithm of the number of patients on the clinician panel. Rate ratios were calculated as e to the power of the parameter estimates.
CI, confidence interval; FTE, full-time equivalent; HCC, hierarchical condition category; NP/PA, nurse practitioner/physician assistant.