Table 3.

Proportion of tweets posted at time of day by group.

	Proportion of tweets (%) by time
	0:00-5:59	6:00-11:59	12:00-17:59	18:00-23:59
Non-sleep group	12.1	22.5	28.7	36.7
Sleep group	16.8	16.3	28.6	38.1
P value	<.001	<.001	.72	<.001