Table 4.

Headache Severity Predicting Same Day Sleep Behavior

Independent Variable	Dependent Variable	b	SE	95% CI	t	p
Headache Severity	Nap (yes/no)	0.07	0.04	−0.01, 0.14	1.79	0.0735
Headache Severity	Nap duration (min)	6.08	2.05	2.01, 10.14	2.96	0.0037*
Headache Severity	Bed Time (min from midnight)	−2.62	1.10	−4.78, −0.48	−2.39	0.0171
Headache Severity	Rise Time (min from midnight)	−0.30	1.21	−2.68, 2.08	−0.25	0.8057
Headache Severity	Time in Bed (min)	2.02	1.35	−0.63, 4.66	1.5	0.1344

^*p<.0125 for Nap duration

Note. Headache severity was measured on a 0-10 scale indicating maximum headache severity. The nap variable was a dichotomous variable based on whether a nap was reported the same day as the headache severity rating. Nap duration was the mean duration of the nap on days when a nap was taken. Units for bed time and rise time are reported in minutes centered on midnight, such that negative values are before midnight and positive values are after midnight.