Individual or environmental characteristics associated with severe bicycling trauma
| Characteristic | Group; no. (%) | p value | ||
|---|---|---|---|---|
| Overall, n = 258 | Street cyclists, n = 209 | Mountain bikers, n = 49 | ||
| Time of year | 0.09 | |||
| Winter (Dec. 21 to Mar. 19) | 11 (4.3) | 10 (4.8) | 1 (2.0) | |
| Spring (Mar. 20 to June 20) | 76 (29.5) | 62 (29.7) | 14 (28.6) | |
| Summer (June 21 to Sept. 22) | 139 (53.9) | 106 (50.7) | 33 (67.3) | |
| Fall (Sept. 23 to Dec. 20) | 28 (10.9) | 27 (12.9) | 1 (2.0) | |
| Unknown | 4 (1.6) | 4 (1.9) | 0 (0) | |
| Time of the week | 0.029 | |||
| Weekday | 134 (51.9) | 115 (55.0) | 19 (38.8) | |
| Weekend* | 124 (48.1) | 94 (45.0) | 30 (61.2) | |
| Time of the day | 0.17 | |||
| Early morning (12:01 am–8:00 am) | 18 (7.0) | 16 (7.7) | 2 (4.1) | |
| Morning/afternoon (8:01 am–4:00 pm) | 62 (24.0) | 46 (22.0) | 16 (32.7) | |
| Evening (4:01 pm–8:00 pm) | 39 (15.1) | 36 (17.2) | 3 (6.1) | |
| Night (8:01 pm–12:00 am) | 16 (6.2) | 12 (5.7) | 4 (8.2) | |
| Unknown | 123 (47.7) | 99 (47.4) | 24 (49.0) | |
| Ethanol usage | 5 (1.9) | 5 (2.4) | 0 (0) | 0.59 |
↵* A weekend was defined as the time period between 5:00 pm on Friday and 8:00 am on Monday.