Table 3.
Multivariate Poisson regression model for total emergency medical services time in the control and affected period
| Control period |
Affected period |
|||
|---|---|---|---|---|
| Estimate (95% CI) | p Value | Estimate (95% CI) | p Value | |
| Constant, minutes | 24.0 (23.5 to 24.4) | <0.001*** | 28.6 (27.1 to 30.1) | <0.001*** |
| Variable | RR (95% CI) | p Value | RR (95% CI) | p Value |
| Age, year | ||||
| 0–14 | 0.89 (0.88 to 0.91) | <0.001*** | 0.79 (0.72 to 0.86) | <0.001*** |
| 15–64 | Reference | – | Reference | – |
| 65– | 0.98 (0.98 to 0.99) | <0.001*** | 0.98 (0.95 to 1.01) | 0.18 |
| Sex | ||||
| Male | Reference | – | Reference | – |
| Female | 0.99 (0.98 to 1.00) | <0.01** | 0.97 (0.94 to 0.99) | 0.02* |
| Time of the day | ||||
| 6:00–12:00 | Reference | – | Reference | – |
| 12:00–18:00 | 1.01 (1.00 to 1.02) | 0.17 | 0.96 (0.93 to 0.99) | 0.01* |
| 18:00–24:00 | 1.06 (1.05 to 1.07) | <0.001*** | 1.07 (1.03 to 1.11) | <0.001*** |
| 24:00–6:00 | 1.14 (1.12 to 1.15) | <0.001*** | 1.06 (1.02 to 1.11) | <0.01** |
| Day of the week | ||||
| Weekday | Reference | – | Reference | – |
| Weekend | 1.01 (1.00 to 1.02) | <0.01** | 0.98 (0.95 to 1.00) | 0.08 |
| Scene of EMS call | ||||
| Soma | Reference | – | Reference | – |
| Minamisoma 30 km | 0.98 (0.96 to 1.00) | 0.01* | 0.83 (0.79 to 0.87) | <0.001*** |
| Minamisoma 20–30 km | 0.97 (0.96 to 0.98) | <0.001*** | 0.97 (0.94 to 1.00) | 0.05 |
| Minamisoma −20 km | 1.07 (1.06 to 1.09) | <0.001*** | 0.95 (0.87 to 1.04) | 0.30 |
| Iitate | 1.07 (1.05 to 1.09) | <0.001*** | 1.15 (1.11 to 1.20) | <0.001*** |
| Other | 1.04 (0.98 to 1.11) | 0.21 | 1.35 (1.19 to 1.53) | <0.001*** |
| Reason for EMS call | ||||
| Disaster-related | – | – | 1.08 (1.01 to 1.15) | 0.03* |
| Abdominal pain | Reference | – | Reference | – |
| Chest pain | 1.06 (1.04 to 1.08) | <0.001*** | 1.01 (0.95 to 1.07) | 0.78 |
| CPA | 0.97 (0.94 to 0.99) | <0.01** | 0.86 (0.79 to 0.94) | <0.001*** |
| DOC | 1.04 (1.03 to 1.06) | <0.001*** | 1.02 (0.97 to 1.07) | 0.44 |
| Fever | 1.01 (0.98 to 1.03) | 0.61 | 1.05 (0.99 to 1.12) | 0.09 |
| General weakness | 1.07 (1.05 to 1.10) | <0.001*** | 1.03 (0.97 to 1.10) | 0.29 |
| Gynaecology | 0.91 (0.83 to 1.00) | 0.05* | 0.89 (0.72 to 1.10) | 0.27 |
| Intoxicated | 1.13 (1.09 to 1.18) | <0.001*** | 1.31 (1.20 to 1.44) | <0.001*** |
| Neurological symptom | 1.05 (1.04 to 1.07) | <0.001*** | 1.00 (0.95 to 1.06) | 0.95 |
| Pain, unspecified | 1.12 (1.10 to 1.15) | <0.001*** | 1.07 (0.98 to 1.15) | 0.12 |
| Self-harm | 1.15 (1.10 to 1.21) | <0.001*** | 0.86 (0.76 to 0.97) | 0.01* |
| SOB | 1 (0.98 to 1.02) | 0.74 | 1.02 (0.96 to 1.09) | 0.47 |
| Trauma | 1.08 (1.06 to 1.10) | <0.001*** | 1.02 (0.97 to 1.07) | 0.55 |
| Other | 1 (0.96 to 1.03) | 0.90 | 1.11 (1.02 to 1.20) | 0.02* |
| Distance (km) | ||||
| From FS to scene of call | 1.02 (1.02 to 1.02) | <0.001*** | 1.02 (1.02 to 1.02) | <0.001*** |
| From scene of call to hospital | 1.02 (1.02 to 1.02) | <0.001*** | 1.02 (1.02 to 1.02) | <0.001*** |
*Statistically significant at 0.05 level.
**Statistically significant at 0.01 level.
***Statistically significant at 0.001 level.
CPA, cardiopulmonary arrest; DOC, disturbance of consciousness; EMS, emergency medical services; FS, fire station; SOB, shortness of breath; RR, relative ratio.