. 2021 Apr 13;18(8):4104. doi: 10.3390/ijerph18084104

Table 7.

Logistic regression models for drivers’ characteristics that affect behavior that limits concentration while driving.

Model	Explanatory Variables		Odds Ratio	p-Value	95% Confidence Interval
Model	Explanatory Variables		Odds Ratio	p-Value	Lower	Upper
Dependent variable: Drink driving	Sex (reference female)	Male	5.04	<0.001	3.12	8.14
	Age (reference 75+)	17–34	7.97	0.002	2.13	29.84
		35–54	6.21	0.005	1.74	22.10
		55–74	6.82	0.003	1.92	24.13
		Constant	0.008	<0.001	0.002	0.03
Dependent variable: Cell phone calls	Sex (reference female)	Male	1.18	0.656	0.58	2.41
	Age (reference 17–34)	35–54	1.18	0.580	0.66	2.12
		55–74	0.40	0.005	0.21	0.76
		75+	0.04	0.003	0.005	0.32
	Vehicle (reference motorbike)	Car	5.64	<0.001	3.07	10.35
	Vehicle (reference motorbike)	Professional vehicle	6.78	<0.001	2.59	17.71
	Age ## Sex	Male 35–54	1.53	0.309	0.67	3.50
		Male 55–74	2.75	0.019	1.18	6.41
		Male 75+	3.08	0.330	0.32	29.73
		Constant	0.18	<0.001	0.09	0.40
Dependent variable: Smoking	Sex (reference female)	Male	1.43	0.043	1.01	2.04
	Age (reference 17–34)	35–54	1.99	0.009	1.186	3.33
		55–74	1.04	0.876	0.60	1.81
		75+	0.17	0.006	0.05	0.61
	Vehicle (reference motorbike)	Car	3.56	0.002	1.61	7.91
	Vehicle (reference motorbike)	Professional vehicle	9.53	<0.001	3.25	28.00
	Social class (reference upper)	Middle to upper	1.64	0.074	0.95	2.82
		Middle to lower	1.62	0.068	0.97	2.72
		Lower	3.73	<0.001	2.06	6.78
	Area of residence (reference rural)	Urban	2.95	0.002	1.47	5.92
	Area of residence (reference rural)	Town	2.69	0.013	1.23	5.88
		Constant	0.01	<0.001	0.003	0.03
Dependent variable: Texting and/or setting the GPS	Sex (reference female)	Male	1.30	0.153	0.91	1.86
	Age * (reference 55–74)	17–34	9.10	<0.001	5.51	15.02
	Age * (reference 55–74)	35–54	3.99	<0.001	2.64	6.05
	Vehicle (reference motorbike)	Car	5.01	0.003	1.75	14.32
	Vehicle (reference motorbike)	Professional vehicle	9.24	0.001	2.46	34.72
	Area of residence (reference rural)	Urban	2.66	0.008	1.29	5.48
	Area of residence (reference rural)	Town	2.02	0.096	0.88	4.64
		Constant	0.01	<0.001	0.002	0.03

All models were concluded using backward elimination procedure. Variables considered were sex, age and all variables statistically significant in the univariate analyses, * The age category 75+ was excluded from this analysis due to a very small sample count.