. 2022 Jan 5;5(1):e2142100. doi: 10.1001/jamanetworkopen.2021.42100

Table 1. Characteristics of the Control and Lockdown Samples^a.

Characteristic	Participants, No. (%)		P value
Characteristic	Control sample (n = 5308)	Lockdown sample (n = 3664)	P value
Age, median (IQR), y	16 (15-17)	16 (15-17)	<.001^b
Sex
Female	3454 (65.1)	2429 (66.3)	.24^c
Male	1854 (34.9)	1235 (33.7)	.24^c
Swiss German native speaker	3593 (67.7)	2384 (65.1)	.003^c
Physical disease	403 (7.6)	196 (5.3)	<.001^c
Mental illness	276 (5.2)	185 (5.0)	.51^c

^{^a}

The control sample included students who completed surveys from May to July 2017, and the lockdown sample included students who completed surveys from May to June 2020 during high school closure owing to the first COVID-19 wave in Switzerland.

^{^b}

Mann-Whitney U test was performed.

^{^c}

χ² test was performed.

Table 1. Characteristics of the Control and Lockdown Samplesa.

Table 1. Characteristics of the Control and Lockdown Samples^a.