Results of multivariate ordinal logistic regression analysis
| Variable | Rate ratio (95% CI) |
| WPSS score | |
| Urgent | 0.37 (0.23 to 0.60) |
| Alert | 0.67 (0.51 to 0.87) |
| Normal | Reference category |
| Referrer | |
| Ambulance | 0.31 (0.18 to 0.55) |
| Specialist | 0.93 (0.63 to 1.36)* |
| General practitioner | 0.67 (0.45 to 1.00) |
| Self referred patients | Reference category |
| Main complaint | |
| Non external causes of disease | 4.37 (2.90 to 6.59) |
| External or unknown causes of disease | Reference category |
| Age | 0.99 (0.98 to 1.00) |
Note 1: Nagelkerke pseudo R2=0.297.
Note 2: ESI 4 and 5 are the overall reference categories.
↵* Not statistically significant (p>0.05).
WPSS, Worthing Physiological Scoring System.