Table 5. Interaction model to test transfer effect on outcomes for each EMS use group.
| Outcomes | Outcome: Death | Outcome: Disability† | ||||||
|---|---|---|---|---|---|---|---|---|
| AOR* | 95% CI | P value | AOR* | 95% CI | P value | |||
| Original dataset | ||||||||
| EMS use | ||||||||
| Direct | 1.00 | 1.00 | ||||||
| Transfer | 1.23 | 0.92 | 1.64 | 0.163 | 0.72 | 0.49 | 1.04 | 0.082 |
| No EMS use | ||||||||
| Direct | 1.00 | 1.00 | ||||||
| Transfer | 1.65 | 1.22 | 2.24 | 0.001 | 1.34 | 1.05 | 1.73 | 0.020 |
| Propensity score matched dataset | ||||||||
| EMS use | ||||||||
| Direct | 1.00 | 1.00 | ||||||
| Transfer | 1.41 | 0.99 | 2.02 | 0.058 | 0.76 | 0.49 | 1.19 | 0.236 |
| No EMS use | ||||||||
| Direct | 1.00 | 1.00 | ||||||
| Transfer | 1.57 | 1.09 | 2.26 | 0.016 | 1.35 | 1.00 | 1.83 | 0.054 |
*Adjusted for age, sex, ED visit time, weekday, education level, health behavior (exercise, smoking, and alcohol), and past medical history (DM, hypertension, dyslipidemia, chronic kidney disease, heart disease, and stroke); †For disability, the ORs were calculated for alive patients.