Table 2.

Unadjusted conditional logistic regression models predicting bicycle crashes at intersections, Iowa, 2007-2010, N=294.

Predictor of bicycle crash	Unadjusted OR	95% CI
On-road bicycle facility present (ref=none)	0.58	0.23-1.48
On-road bicycle facility type (ref=none)
Pavement markings (bicycle lane or shared lane arrows)	0.42	0.10-1.80
Bicycle-specific signage	1.14	0.30-4.33
Pavement markings & signage	0.20	0.02-1.93
Sidewalks, index streeta,b (ref=none)
Full	2.53	1.01-6.35
Partial	1.78	0.71-4.44
Sidewalks, non-index streetc,d (ref=none)
Full	1.57	0.62-3.95
Partial	1.03	0.38-2.79
Traffic controls present, index streeta (ref=no)	1.36	0.63-2.97
Traffic controls present, non-index streetb (ref=no)	2.75	1.22-6.18
Bicycle volume (per 5)	1.09	0.76-1.56
Motor vehicle volume (per 5)	1.04	1.01-1.07
Curb to curb width (per 10ft)	1.48	1.15-1.91
Speed limit, index streeta (per 5mph)	0.94	0.60-1.48
Speed limit, non-index streetb (per 5mph)	0.89	0.49-1.63

Ref=reference

^aIndex street= street motor vehicle was traveling on when crash occurred

^bCochran-Armitage trend test p=0.13

^cNon-index street = street motor vehicle was not traveling on when crash occurred

^dCochran-Armitage trend test p=0.48