Table 2.Group differences and prevalence of sleep disturbances in students with nightmares at least once a week and students reporting nightmares less than once a week.

 

 

Nightmares < 1x/week
(n = 1663)

Nightmares ≥ 1x/week
(n = 532)

χ-Test

 

Unadj. OR (95% CI)

Frequent difficulties falling asleep (3x/week more than 30 min)

12.0% (200/1663)

24.1% (128/532)

χ(1) = 45.922, p ≤ .001

OR = 2.32 (1.80-2.97)

Frequent awaking at night
(3x/week or more often)

13.2% (220/1663)

28.0% (149/532)

χ(1) = 62.946, p ≤ .001

OR = 2.55 (2.01-3.23)

Frequent fitful sleep
(3x/week or more often)

9.6% (160/1663)

31.6% (168/532)

χ(1) = 152.896, p ≤ .001

OR = 4.34 (3.49-5.54)

Frequent anxiety concerning going to bed (3x/week or more often)

(13/1663)

5.1% (27/532)

χ(1) = 41.562, p ≤ .001

OR = 6.79 (3.48-13.26)

Usually going to bed after midnight

25.3% (420/1663)

30.8% (164/532)

χ(1) = 6.407, p ≤ .05

OR = 1.32 (1.06-1.64)