Table 3. Exploratory factor analysis of the insomnia subscale of the sleep-50 questionnaire (N = 166).

	Rotated Factor Loadings
Item	Sleep Onset	Sleep Maintenance	Communalities
I worry so much it prevents me from falling asleep	0.91		0.79
I find it difficult to fall asleep	0.86		0.72
I find it hard to relax	0.80		0.63
I sleep too little	0.43		0.35
I wake up during the night		0.80	0.59
I wake up early and cannot get back to sleep		0.74	0.53
After waking up during the night, I fall asleep slowly		0.73	0.69
I sleep lightly		0.67	0.45
Cronbach’s alpha	0.77	0.74

Note: Factor loadings below .36 are not deemed substantive given the sample size and have therefore been omitted [79]