Table 2. Prevalence of environmental and stress factors (n = 1388).

Sleep hygiene parameter	Sometimes	Often
Regular bedtime	14.5 (201)	83.2% (1154)
Regular waking time	18.8% (261)	77.0% (1067)
Other people in room	6.6% (91)	41.3% (573)
Watching TV before going to sleep	44.0% (611)	30.6% (425)
TV set in room	1.4% (20)	12.3% (171)
Light	6.9% (96)	2.3% (32)
Noise	9.6% (133)	1.3% (18)
Smoking in household	11.8% (163)	11.6% (161)
Infections	21.4% (297)	4.3% (60)
Allergies	8.2% (114)	4.2% (58)
Chronic illness	1.2% (17)	1.9% (26)
Family problems	26.2% (363)	2.4% (33)