Table 2.

Change in Sleep Variables from Pre-COVID to During COVID-19

	Before COVID-19	During COVID-19	Change	Effect Size	p-value
Bedtime
Weekday	10:37 PM (1.11)	1:10 AM (2.10)	2.51 (1.91) hours	1.32	< 0.001
Weekend	12:07 AM (1.42)	1:46 AM (2.10)	1.65 (1.79) hours	0.93	< 0.001
Waketime
Weekday	6:24 AM (0.97)	10:18 AM (2.34)	3.85 (2.40) hours	1.60	< 0.001
Weekend	9:27 AM (1.55)	10:56 AM (2.30)	1.47 (2.07) hours	0.72	< 0.001
Sleep Duration (hours)
Weekday	7.79 (1.08)	9.13 (1.66)	1.35 (1.78) hours	0.75	< 0.001
Weekend	9.34 (1.40)	9.17 (1.67)	−0.18 (1.76) hours	−0.10	< 0.001
Social Jetlag (hours)	2.23 (1.11)	0.62 (0.98)	−1.61 (1.33) hours	−1.21	< 0.001

Note: Means with Standard Deviations are used to summarize continuous data and compared using a paired t-test.