Single-bicycle (n=62) | Multivehicle (n=67) | OR | 95% CI | P value | |
Injury severity score (ISS), median (IQR) | 9.0 (5.0, 14.0) | 13.0 (8.0, 17.0) | 0.030 | ||
Major trauma | 0.38 | 0.16 to 0.93 | 0.030 | ||
No | 18 (29%) | 9 (13%) | |||
Yes | 44 (71%) | 58 (87%) | |||
Head injury (including concussion) | 15 (24%) | 27 (40%) | 0.47 | 0.22 to 1.01 | 0.051 |
Orthopaedic injuries | |||||
Spinal injury | 16 (26%) | 26 (39%) | 0.55 | 0.26 to 1.16 | 0.12 |
Scapula fracture | 6 (10%) | 10 (15%) | 0.61 | 0.21 to 1.79 | 0.37 |
Clavicle fracture | 16 (26%) | 15 (22%) | 1.20 | 0.54 to 2.71 | 0.65 |
Multiple rib fractures | 11 (18%) | 22 (33%) | 0.44 | 0.19 to 1.00 | 0.050 |
Humerus fracture | 4 (6%) | 2 (3%) | 2.24 | 0.40 to 12.69 | 0.35 |
Forearm fracture | 14 (23%) | 8 (12%) | 2.15 | 0.83 to 5.55 | 0.11 |
Pelvis fracture | 5 (8%) | 9 (13%) | 0.57 | 0.18 to 1.79 | 0.33 |
Femur fracture | 6 (10%) | 5 (7%) | 1.33 | 0.38 to 4.59 | 0.65 |
Tibia/fibula fracture | 6 (10%) | 8 (12%) | 0.79 | 0.26 to 2.42 | 0.68 |
Hospital length of stay, days, median (IQR) | 3.2 (2.3, 6.7) | 3.8 (2.3, 5.1) | 0.91 | ||
Discharge destination | 0.93 | ||||
Home | 54 (87%) | 57 (85%) | 0.95 | 0.06 to 15.53 | |
Rehabilitation | 7 (11%) | 9 (13%) | 0.78 | 0.04 to 14.75 | |
Hospital for convalescence | 1 (2%) | 1 (1%) | 1.00 | ||
Return to work—12 months postinjury* | 2.18 | 0.38 to 12.47 | 0.37 | ||
Yes | 49 (96.1%) | 45 (91.8%) | |||
No | 2 (3.9%) | 4 (8.2%) | |||
12 month complete functional recovery† | 3.19 | 1.45 to 6.98 | 0.003 | ||
Yes | 30 (53%) | 15 (26%) | |||
No | 27 (47%) | 43 (74%) |
Data are stratified by single-bicycle crashes and multivehicle crashes. Note: patients could sustain one or more of the injuries listed in this table.
*N=29 (22.5%).
†N=14 (10.9%).