Table 2.

Results of Exploratory Factor Analysis (n = 181): Factors and Factor loadings

CASQ Item	Factor 1 Sleep in school	Factor 2 Alert in school	Factor 3 Sleep in evening	Factor 4 Sleep in transport
Sq17 Fall asleep in morning at school	0.777	0.079	.228	0.191
Sq3 Fall asleep in afternoon classes	0.722	0.179	−0.069	0.044
Sq25 During school day, realize just fell asleep	0.719	0.134	0.194	0.226
Sq5 Fall asleep morning classes	0.719	0.057	0.248	0.151
Sq2 Fall asleep last class	0.543	0.207	−0.017	0.050
Sq29 When in class, wide awake	0.257	0.746	0.275	0.142
Sq4 Wide-awake whole day	0.139	0.736	0.245	0.237
Sq7 Wide awake last class of day	0.102	0.707	0.062	0.080
Sq12 Feel alert during classes	0.125	0.519	0.298	0.004
Sq1 Go through whole school day without feeling tired	0.108	0.497	0.061	0.206
Sq18 Feel sleepy doing homework in the evening	0.041	0.267	0.790	0.096
Sq31 Fall asleep during schoolwork at home in evening	0.272	0.127	0.700	0.272
Sq9 Sleepy in evening after school	0.090	0.279	0.507	0.174
Sq28 Fall asleep when ride bus, car, train	0.235	0.175	0.102	0.748
Sq13 Feel drowsy in car > 5 minutes	0.042	0.103	0.224	0.725
Sq14 Feel sleepy on bus trip for school event	0.214	0.216	0.112	0.584