Table 2.

Statistics of independent variables.

Factor		Variable	Mean (base)	SD
Demographic
	Sex	demo_gender	0.49 (male)	0.50
	Age	demo_age	23.94	9.65
	Country	demo_country	0.62 (US)	0.48
Usual
	Morning state	usual_state_alert	2.27	0.86
	Morning state	usual_state_tired	3.30	0.68
	Morning state	usual_state_score	4.29	1.39
	Habit	usual_habit_morningActivity	0.60	0.48
	Theory of planned behavior	usual_tpb_attitude	6.36	1.07
	Theory of planned behavior	usual_tpb_subjectiveNorm	5.72	1.62
	Theory of planned behavior	usual_tpb_intention	6.45	1.03
	Theory of planned behavior	usual_tpb_control	4.43	1.86
Daily
	Alarm usage	daily_usage_dayOfWeek	0.79 (Weekday)	0.24
	Alarm usage	daily_usgae_ringCount	1.72	1.46
	Alarm usage	daily_usage_ring2dismiss	721.10	1496.27
	Alarm usage	daily_usage_continuity	3.78	1.67
	Alarm usage	daily_first_ringTime	25900.05	4570.43
	Alarm usage	daily_last_typeInBed	0.51	0.46
	Alarm usage	daily_last_typeOutOfBed	0.16	0.35
	Alarm usage	daily_last_isLoud	0.05 (True)	0.18
	Alarm usage	daily_last_isLabel	0.29 (True)	0.43
	Time to sleep	daily_sleep_time	7.55	3.06