Table 1. Prevalence of sleep disorders (n = 1388).

Insomnias	Sometimes	Often
Difficulty falling asleep	16.8% (233)	5.1% (70)
Difficulty staying asleep	12.8% (178)	5.2% (72)
Waking at night	39.6% (550)	5.6% (78)
Parasomnias	Sometimes	Often
Night terrors	7.6% (105)	0.5% (7)
Sleepwalking	3.2% (44)	0.1% (1)
Nightmares	22.1% (306)	1.7% (24)
Enuresis	11.0% (153)	5.3% (74)
Bruxism	24.5% (340)	7.1% (99)
Organic sleep disorders/symptoms	Sometimes	Often
Snoring	28.0% (388)	4.6% (64)
Apnea	1.9% (27)	0.9% (12)
Restless sleep	22.4% (311)	3.8% (52)
Perspiration	22.1% (307)	3.9% (54)
Restless legs syndrome	2.4% (33)	0.5% (7)
Daytime symptoms	Sometimes	Often
Midday nap	6.4% (89)	1.0% (14)
Daytime fatigue	14.4% (199)	0.9% (12)
Suddenly falling asleep	2.8% (39)	0.1% (2)
Restricted physical capacity	5.3% (73)	1.4% (20)