Table 2.

Longitudinal Measures

	Class			Month			Class × Month			Covariate (Gender)
	F (1,48)	p	ηp2	F (5,245)	p	ηp2	F (5,245)	p	ηp2	Wilk’s Lambda Rao R (6,43)	p
Weekly sleep diary
Light-off hour	2.39	0.13	0.04	2.43	0.04	0.04	1.71	0.13	0.03	0.90 0.76	0.60
Total Sleep Time	4.52	0.04	0.08	3.55	0.004	0.06	1.90	0.09	0.03	0.99 0.06	0.99
Sleep Onset Latency	0.06	0.81	0.001	1.85	0.10	0.03	1.64	0.15	0.03	0.92 0.65	0.69
Sleep Efficiency (Total Sleep Time/Total Bed Time)	0.81	0.37	0.01	1.66	0.14	0.03	0.45	0.81	0.009	0.90 0.79	0.58
Number of Awakenings	3.17	0.09	0.06	1.13	0.35	0.02	1.09	0.37	0.02	0.68 1.34	0.29
Wake-up hour	9.37	0.003	0.16	6.04	0.00003	0.10	1.78	0.12	0.03	0.90 0.81	0.56
Psychomotor Vigilance Test (PVT)
Median RT	9.51	0.003	0.16	6.41	0.0001	0.11	2.65	0.02	0.05	0.87 1.05	0.41
Speed	3.38	0.07	0.06	9.36	<0.00001	0.16	1.55	0.17	0.03	0.89 0.85	0.54
10% slowest RT	11.06	0.002	0.18	2.98	0.01	0.05	2.82	0.02	0.05	0.81 1.71	0.14
10% fastest RT	1.39	0.24	0.02	4.65	0.0004	0.08	0.92	0.47	0.01	0.93 0.49	0.81
Karolinska Sleepiness Scale (KSS)	0.94	0.34	0.01	1.08	0.37	0.02	0.49	0.78	0.009	0.93 0.53	0.78

Notes: Results of the Class × Month ANCOVAs on longitudinal measures derived from weekly sleep diaries, performance at the Psychomotor Vigilance Task, and self-ratings provided by the Karolinska Sleepiness Scale, with gender considered as a covariate. Bold values denote statistical significance at the p ≤ 0.05 level.