Model of attending physician new patients per hour and covariates at site 2
| Effect | Estimated new patients per hour | 95% CI | P value |
| Hour 1 (intercept) | 2.95 | 2.47 to 3.43 | <0.01 |
| Hour 2 | −1.35 | −1.71 to −0.99 | <0.01 |
| Hour 3 | −1.62 | −2.04 to −1.20 | <0.01 |
| Hour 4 | −1.91 | −2.37 to −1.44 | <0.01 |
| Hour 5 | −2.07 | −2.54 to −1.61 | <0.01 |
| Hour 6 | −1.93 | −2.40 to −1.49 | <0.01 |
| Hour 7 | −2.12 | −2.54 to −1.72 | <0.01 |
| Hour 8 | −2.69 | −3.03 to −2.34 | <0.01 |
| Arrivals | 0.37 | 0.31 to 0.43 | <0.01 |
| Arrivals * hour 2 | −0.01 | −0.06 to 0.03 | <0.01 |
| Arrivals * hour 3 | 0.00 | −0.01 to 0.09 | <0.01 |
| Arrivals * hour 4 | 0.01 | −0.04 to 0.06 | <0.01 |
| Arrivals * hour 5 | 0.02 | −0.05 to 0.09 | <0.01 |
| Arrivals * hour 6 | −0.11 | −0.19 to −0.04 | <0.01 |
| Arrivals * hour 7 | −0.14 | −0.22 to −0.07 | <0.01 |
| Arrivals * hour 8 | −0.23 | −0.29 to −0.17 | <0.01 |
| Each additional doctor working | −0.27 | −0.34 to −0.21 | <0.01 |
| Acuity (median ESI) | 0.12 | 0.05 to 0.20 | <0.01 |
Asterisk (*) denotes interaction terms.
Estimate of new patients per hour=(2.95+hourly adjustment)+(arrivals×(0.37+hourly adjustment))+(doctors working×−0.27)+(median acuity×0.25).
In the first hour of the shift, a physician working alone with five new patient arrivals and a median ESI score of 3 would see an estimate of: 2.95+(5×0.37)+(0×−0.27)+(3×0.25)=5.55 patients.
In the fourth hour of the shift, a physician working alone with five new patient arrivals and a median ESI score of 3 would see an estimate of: (2.95+−1.91)+(5×(0.37+0.01))+(0×−0.27)+(3×0.25)=3.69 patients.
ESI, Emergency Severity Index.