Results of the Random-Effects Logistic Regression
| Variable (Reference Categorya) | β | SE | z | P >|z| | 95% CI | Odds Ratio |
|---|---|---|---|---|---|---|
| CI=confidence interval; NS = not significant; SE=standard error. | ||||||
| ρ =0.314. | ||||||
| Likelihood ratio test of ρ =0: χ2=788.13; P <.001. | ||||||
| a Variables listed with reference categories were entered in the regression as dichotomous variables (presence or absence of the reference characteristic). | ||||||
| Symptom scenario (urinary tract Infection) | −0.14877 | 0.05635 | −2.64 | .008 | −0.25920 to −0.03833 | 0.882 |
| Appointment wait period (1 day or more) | −2.78922 | 0.07882 | −35.39 | <.001 | −2.94371 to −2.63474 | 0.107 |
| Provider care setting (physician at private office) | 1.06723 | 0.07365 | 14.49 | <.001 | 0.92288 to 1.21158 | 2.365 |
| Fee | −0.03396 | 0.00353 | −9.62 | <.001 | −0.04088 to −0.02705 | – |
| Age | −0.00682 | 0.00372 | −1.83 | .067 | −0.01411 to 0.00047 | – |
| Race (white) | 0.03424 | 0.05786 | 0.59 | .554 | −0.07918 to 0.14765 | NS |
| Sex (male) | −0.04879 | 0.12731 | −0.38 | .702 | −0.29831 to 0.20073 | NS |
| Education (high school or less) | −0.02515 | 0.03632 | −0.69 | .489 | −0.09633 to 0.04603 | NS |
| Income | 0.00597 | 0.02585 | 0.23 | .817 | −0.04469 to 0.05664 | – |
| Constant | 5.69811 | 0.49620 | 11.48 | <.001 | 4.72559 to 6.67064 | – |