Table II.

Adjusted ORs for the Observational and Computerized Helmet and Safety Rules

	Correct at Pre-test				Correct at Post-test
	Treatment		Control		Treatment		Control
Outcome Measure	n	%	n	%	n	%	n	%	Adjusteda OR	p	95% CI
Observational bike helmet items
Place two fingers from eyebrows	52	48.6	37	37.4	65	60.7	32	32.3	3.2	<.001	1.73–5.93
Sitting straight from ear to ear	82	76.6	84	84.8	93	86.9	79	79.8	1.7	.163	0.80–3.61
Buckle was strapped	96	89.7	89	89.9	97	90.7	91	91.9	0.6	.578	0.08–4.03
Computerized items
Bike helmets
Helmet too high	18	16.7	19	18.8	103	95.4	22	21.8	159.5	<.001	50.2–506.5
Helmet too low	34.5	31.0	30	29.7	94	87.0	28	27.7	23.9	<.001	10.8–52.8
Safety Rules
Hand signal stop	11	10.2	10	9.9	90	83.3	10	9.9	65.7	<.001	25.1–172.1
Rider 1—no helmet	87	80.6	80	79.2	99	91.7	82	81.2	2.8	.027	1.1–6.8
Rider 2—safe	101	93.5	96	95.0	103	95.4	94	93.1	1.5	.469	0.5–5.1
Rider 3—stuff in hands	92	85.2	83	82.2	106	98.1	86	85.1	10.6	.003	2.2–50.9

Note. An OR of 1.5 is considered a small effect, 2.5 a medium effect, and 4.3 a large effect.

^aORs are adjusted for pre-test response.