Table 2.

Time needed to fall asleep in the gender adjusted overall sample and split in genders

Time needed to fall asleep	Overall sample		Female students		Male students		Differences between the genders
	Frequency	Proportion	Frequency	Proportion	Frequency	Proportion
Immediately	533	24.3%	375	24.0%	155	24.6%	–
15 min	760	34.6%	494	31.6%	238	37.7%	χ² = 7.553; P = 0.006
30 min	553	25.2%	427	27.3%	146	23.1%	χ² = 4.073; P = 0.044
1 h	226	10.3%	168	10.7%	62	9.8%	–
1.5 h	74	3.4%	59	3.8%	19	3.0%	–
2 h	37	1.7%	33	2.1%	8	1.3%	–
3 h	10	0.5%	7	0.4%	3	0.5%	–
>3 h	1	0.1%	2	0.1	–	–	–