Table 3.

Objective (MSLT) and subjective (KSS) daytime sleep propensity at baseline

	Young Mean (SD)	Middle-Aged Mean (SD)	Older Mean (SD)	Effect of Age	Middle-Aged vs. Young	Older vs. Young	Older vs. Middle-Aged
MSLT (min)	8.7 (4.5)	11.7 (5.1)	14.2 (4.1)	P < 0.0001	P = 0.0078	P < 0.0001	(P = 0.0567)
KSS points (max = 9)	3.7 (1.0)	3.2 (0.9)	3.4 (0.6)	P = 0.0310	P = 0.0088	NS	NS

MSLT: N = 44, 35, 31 for the young, middle-aged, and older, respectively. KSS: N = 39, 35, 31. Statistics for MSLT on log transformed values.