Risk ratios and CIs for the difference between severe (incapacitating injury or killed) and non-severe (non-incapacitating injury, possible injury) injuries for bicycle-vehicle crashes, New York City, 2011 (multivariable log-binomial generalised linear regression)
| Univariable RR (95% CI) | Multivariable RR (95% CI)* | |
|---|---|---|
| Intersection angle | ||
| Orthogonal (85<×<95) | 1 | 1 |
| Non-orthogonal (0<×≤85 or 95≤×<175) | 1.36 (1.04 to 1.79) | 1.37 (1.05 to 1.80) |
| Straight street (175≤×≤180) | 1.34 (1.03 to 1.73) | 1.31 (1.01 to 1.70) |
| Missing | 1.22 (0.94 to 1.59) | 1.19 (0.92 to 1.55) |
| Width of street at crash location† | ||
| ≤30 m | 1 | 1 |
| >30 m | 1.01 (0.82 to 1.24) | 0.94 (0.76 to 1.16) |
| Road surface condition | ||
| Dry | 1 | 1 |
| Wet/snow/muddy/slush | 0.80 (0.59 to 1.12) | 0.77 (0.55 to 1.07) |
| Missing | 0.43 (0.18 to 1.01) | 0.38 (0.04 to 3.32) |
| Road character | ||
| Straight/level | 1 | 1 |
| Straight/grade/ hillcrest curve | 1.14 (0.79 to 1.66) | 1.10 (0.76 to 1.58) |
| Missing | 0.53 (0.23 to 1.12) | 1.22 (0.19 to 7.94) |
| Time of the day | ||
| Morning (6:00–10:00) | 1.03 (0.76 to 1.41) | 0.99 (0.73 to 1.35) |
| Afternoon (10:00–15:00) | 1.08 (0.85 to 1.38) | 1.03 (0.80 to 1.32) |
| Evening (15:00–21:00) | 1 | 1 |
| Night (21:00–5:00) | 1.54 (1.19 to 1.99) | 1.54 (1.19 to 1.99) |
| Vehicle type | ||
| Car/van/pickup truck | 1 | 1 |
| Truck and bus | 2.02 (1.37 to 2.96) | 2.11 (1.45 to 3.08) |
| Other vehicles | 1.32 (1.06 to 1.63) | 1.31 (1.06 to 1.63) |
| Age | ||
| Children (6≤ age <18) | 0.94 (0.69 to 1.29) | 0.99 (0.73 to 1.37) |
| Young adults (18≤ age <40) | 1 | 1 |
| Middle age and older (40≤ age) | 0.94 (0.73 to 1.20) | 0.93 (0.73 to 1.19) |
| Missing | 0.87 (0.64 to 1.18) | 0.94 (0.69 to 1.28) |
| Sex | ||
| Male | 1 | 1 |
| Female | 1.09 (0.83 to 1.44) | 1.09 (0.83 to 1.44) |
| AADT | 1.00 (0.99 to 1.01) | 1.00 (0.99 to 1.01) |
| Posted speed limits | 1.00 (0.99 to 1.01) | 1.00 (0.99 to 1.01) |
| Facilities | ||
| Present | 1 | 1 |
| Not present | 0.89 (0.73 to 1.10) | 0.91 (0.74 to 1.12) |
Statistically significant values are formatted in bold.
*All variables were included in the multivariable model in addition to annual average daily traffic (AADT) and posted speed limits.