Table 4.

Assessing the effect of nighttime activity on sleep onset (Model 1), duration (Model 2), and offset (Model 3), controlling for age, sex, device used, and sunset time, we see that hunting and fishing are associated with the largest significant effects on sleep onset, duration, and offset. Watching TV and working around the house are also associated with later sleep onset and shorter sleep duration, but not any significant changes in sleep offset.

	Model 1 (Onset)			Model 2 (Duration)			Model 3 (Offset)
	Est	Std Err	p	Est	Std Err	p	Est	Std Err	p
Intercept/Relaxing	9:45PM	741.078	0.015	413.728	684.374	0	6:09AM	423.501	0
Age	−1.236	0.409	0.003	0.114	0.378	0.764	−0.579	0.234	0.015
Male	36.986	13.251	0.006	−39.503	12.227	0.002	0.89	7.576	0.907
Device used	−7.435	13.858	0.593	18.567	12.864	0.152	−12.063	7.899	0.13
Sunset time (minutes)	−28.93	40.307	0.474	−126.817	37.224	0.001	−160.93	23.033	0
Hunting/fishing	207.952	24.837	0	−138.618	23.575	0	29.603	13.996	0.037
‘Just sleep’	15.554	17.821	0.385	−7.556	16.9	0.656	−1.889	10.048	0.851
Listen to radio	3.991	13.739	0.772	3.409	13.035	0.794	−2.05	7.744	0.792
Other	−11.57	35.195	0.743	25.706	33.439	0.444	−12.216	19.826	0.539
‘Social visit’	29.062	21.938	0.188	−22.588	20.931	0.283	5.737	12.334	0.643
Watch TV	64.51	25.242	0.012	−78.287	23.615	0.001	−14.91	14.329	0.3
Housework	41.81	20.255	0.041	−54.705	19.234	0.005	−15.453	11.413	0.179
Model DF	109			108			109
ICC for ID	0.318			0.279			0.337
Cond. R2	0.520			0.459			0.548