Table 1 Frequency and adjusted incident rate ratios of pedestrian-motor vehicle collisions with 95 % confidence intervals by speed hump installation (pre, post), season and roadway characteristics
Number (%) | Adjusted IRR | |
|---|---|---|
(95 % CI) | ||
Outcome: | ||
Collisions | 1344 | n/a |
Primary exposure: | ||
Speed hump implementation | ||
Pre implementation | 594 (44.2 %) | 1.00 |
Post implementation | 750 (55.8 %) | 0.78 (0.66, 0.91) |
Covariates: | ||
Season (month of collision): | ||
Non-winter | 596 (44.3 %) | 1.00 |
Winter | 748 (55.7 %) | 1.26 (1.12, 1.42) |
Roadway characteristics (n = 404): | ||
Road type: | ||
Local | 344 (84.1 %) | 1.00 |
Collector | 60 (14.7 %) | 1.56 (1.18 ,2.08) |
Neighbourhood: | ||
Inner suburbs | 159 (39.4 %) | 1.00 |
Pre-amalgamated City of Toronto | 245 (60.6 %) | 1.63 (1.23, 2.14) |
Land use mix: | ||
Mean entropy score | 0.26 (SD ± 0.21) | 2.48 (1.42, 4.34) |