Table 3.

Means, Medians, and Alpha Coefficients for Sleepiness Measures (Normative Sample)

	Mean (SD)	Median (IQR)	Cronbach's α
CASQ	35.2 (11.0)	34.0 (26.0–43.0)	0.89
PDSS	15.3 (6.4)	15.0 (10.0–20.0)	0.81
SSHS	13.0 (3.6)	12.0 (10.0–15.0)	0.70

CASQ=Cleveland Adolescent Sleepiness Questionnaire, PDSS = Pediatric Daytime Sleepiness Scale, SHSS=Sleep Habits School Survey, SD = Standard Deviation, IQR = Interquartile Range