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. 2010 Feb 15;6(1):41–45.

Table 1.

Driving habits, sleep, sleepiness, and lifestyle habits in students with driving licenses

	Crashes	No crashes	p Value
Driving at least once a week	79	62	0.007^a
Driving at night	25	9	<0.0001^a
Sleepiness while driving	56	35	0.001^a
Bad sleep	29	16	0.010^a
Periodic limb movements	31	28	0.687
Restless legs syndrome	12	5	0.064
Snoring	13	7	0.083
Hypnagogic hallucinations	42	38	0.484
Sleep paralysis	13	8	0.172
Sleepwalking	4	2	0.393
Sleep terror	3	2	0.627
Sleepiness	61	65	0.428
Caffeinated soft drink	32	19	0.021^a
Coffee or tea	55	53	0.720
Tobacco	54	27	<0.0001^a
Alcohol	14	9	0.169
Drugs	21	7	<0.0001^a
Men	76	53	<0.0001*

Data are presented as percentages of students who reported that they had or had not been involved in a motor vehicle crash. χ² statistical test;

^a

p value < 0.05.