Table 2.
The relative risk of medical attendance for motorcycle crash due to exposure to daily minimum, mean, and maximum temperature at 1st, 25th, 75th, and 99th percentile temperature distribution compared to the temperatures with minimum effect size (7.6, 13.8, and 20.5 °C for minimum, mean, and maximum temperature) at different lags
| Lag effect | Extremely cold RR (95% CI) |
Cold RR (95% CI) |
Hot RR (95% CI) |
Extremely hot RR (95% CI) |
|---|---|---|---|---|
| Minimum temperature | ||||
| Lag0 | 1.21 (1.13: 1.30) | 1.02 (1.00: 1.04) | 1.10 (1.03: 1.18) | 1.24 (1.13: 1.35) |
| Lag1 | 1.02 (0.97: 1.07) | 1.02 (1.01: 1.04) | 1.04 (1.00: 1.09) | 1.11 (1.04: 1.18) |
| Lag2 | 1.01 (0.96: 1.07) | 1.02 (1.01: 1.04) | 1.04 (0.99: 1.09) | 1.06 (0.99: 1.13) |
| Lag3 | 1.20 (1.12: 1.29) | 1.02 (1.00: 1.04) | 1.09 (1.03: 1.17) | 1.09 (1.00: 1.18) |
| Lag03 | 1.49 (1.40: 1.60) | 1.09 (1.06: 1.11) | 1.31 (1.20:1.43) | 1.57 (1.40: 1.76) |
| Mean temperature | ||||
| Lag0 | 1.20 (1.11: 1.30) | 1.02 (0.99: 1.05) | 1.11 (1.03: 1.20) | 1.27 (1.14: 1.41) |
| Lag1 | 1.04 (0.98: 1.10) | 1.03 (1.01: 1.05) | 1.05 (1.00: 1.12) | 1.12 (1.04: 1.21) |
| Lag2 | 1.03 (0.97: 1.10) | 1.03 (1.01: 1.05) | 1.04 (0.98: 1.10) | 1.06 (0.98: 1.14) |
| Lag3 | 1.18 (1.10: 1.28) | 1.03 (1.01: 1.06) | 1.07 (0.99: 1.15) | 1.07 (0.96: 1.18) |
| Lag03 | 1.52 (1.42: 1.62) | 1.12 (1.09: 1.15) | 1.30 (1.19: 1.43) | 1.60 (1.43: 1.79) |
| Maximum temperature | ||||
| Lag0 | 1.12 (1.05: 1.20) | 1.02 (0.99: 1.04) | 1.08 (1.01: 1.16) | 1.20 (1.09: 1.32) |
| Lag1 | 1.09 (1.04: 1.15) | 1.03 (1.01: 1.04) | 1.06 (1.01: 1.12) | 1.13 (1.06: 1.21) |
| Lag2 | 1.09 (1.03: 1.14) | 1.03 (1.02: 1.05) | 1.04 (0.99: 1.10) | 1.08 (1.01: 1.15) |
| Lag3 | 1.10 (1.03: 1.18) | 1.04 (1.01: 1.07) | 1.02 (0.95: 1.09) | 1.03 (0.94: 1.13) |
| Lag03 | 1.47 (1.37: 1.57) | 1.12 (1.09: 1.16) | 1.22 (1.12: 1.33) | 1.51 (1.36: 1.68) |
Extreme hot and hot conditions were calculated by comparing the 75th and 99th percentiles of the distribution. Extreme cold and cold conditions were also calculated using the 1st and 25th percentiles of the distribution. For minimum temperature: 1st percentile: −5.9 °C; 25th percentile: 4.2 °C; 50th percentile (median):12.9 °C; 75th percentile: 20.8 °C; 99th percentile: 28.3 °C. For maximum temperature: 1st percentile: 3.1 °C; 25th percentile: 15.7 °C; 50th percentile (median): 26.9 °C; 75th percentile: 35.5 °C; 99th percentile: 42.4 °C. For mean temperature: 1st percentile: −0.7 °C; 25th percentile: 9.9 °C; 50th percentile (median): 19.9 °C; 75th percentile: 28.2 °C; 99th percentile: 35.1 °C. The model included the following variables: minimum temperature, the long-time trend, day of the week, holidays, raining, wind velocity
RR relative risk, CI confidence interval