Table 2.

Twitter user data.

Variable		Total		Per daya
		Mean	Median	Mean	Median
Days active, n
	Non-sleep group	817	777
	Sleep group	1054	993
	P value		<.001
Favorites, n
	Non-sleep group	1909	684	4.8	1.1
	Sleep group	3257	1069	6.2	1.3
	P value		<.001		.11
Followers, n
	Non-sleep group	817	319	5.5	0.5
	Sleep group	792	295	1.2	0.3
	P value		.08		<.001
Friends, n
	Non-sleep group	689	318	6.4	0.5
	Sleep group	518	295	1.3	0.3
	P value		.13		<.001
Follower:Friend ratio
	Non-sleep group	1.44	1.01
	Sleep group	1.45	0.99
	P value		0.901
Statuses, n
	Non-sleep group	12609	5853	22	10
	Sleep group	15253	7622	18	8
	P value		<.001		.04

^aPer day data refers to the total count of the variable divided by the total number of days a user’s account has been active.