Table 2.

Associations between sleep deprivation, characteristics of sleep quality, health behaviours and subjective health complaints.

	Sleep deprivation (%)		Sleep less (%)		Difficulties falling asleep (%)		Waking up tired (%)		Waking up middle of the night (%)
	Yes	p	Yes	p	Yes	p	Yes	p	Yes	p
Physical activity		0.753		< 0.001		0.001		0.798		0.007
≤6 days/week	13.1		12.9		18.7		50.8		8.6
Every day	12.4		21.2		25.5		51.5		12.8
TV		0.113		0.484		0.195		< 0.001		0.133
≥4 hours/day	15.6		15.1		21,9		58.6		6.9
<4 hours/day	12.5		13.7		19.0		49.3		9.2
Fruit and vegetables		0.010		0.011		0.612		< 0.001		0.751
Not every day	14.0		14.8		19.7		52.8		9.0
Every day	10.7		11.6		19.0		45.9		9.3
Drink alcohol		< 0.001		< 0.001		0.007		< 0.001		0.024
Yes	19.2		19.5		21.9		58.7		10.4
No	9.4		10.6		18.1		46.1		8.2
Smoke cigarettes		< 0.001		< 0.001		0.002		< 0.001		< 0.001
Yes	19.1		24.9		25.4		63.1		15.6
No	12.3		12.5		18.8		49.2		8.3
Headache		< 0.001		< 0.001		< 0.001		< 0.001		< 0.001
At least once a month	16.3		17.7		26.1		57.7		13.8
Rarely/never	10.7		11.1		14.8		45.8		5.7
Sadness		< 0.001		< 0.001		< 0.001		< 0.001		< 0.001
At least once a month	16.1		19.5		28.4		57.8		14.8
Rarely/never	11.4		10.8		14.7		46.9		5.9
Tiredness		< 0.001		< 0.001		< 0.001		< 0.001		< 0.001
At least once a month	15.3		16.5		22.5		55.6		10.9
Rarely/never	9.5		9.7		14.9		43.1		6.2
Being bullied		0.165		0.003		< 0.001		0.129		< 0.001
Yes	15.1		18.7		26.2		54.2		15.4
No	12.6		13.2		18.5		50.3		8.2

All variables tested with Fisher's exact test.