Table 1B.

Comparisons between insomnia and non-insomnia individuals used chi-square tests on COVID-19 outbreak-related questions, and mood status.

	Insomnia (n = 564)	Non-insomnia (n = 999)	p
COVID-19 outbreak-related questions
Work requires contact with feverish or infected patients (yes)	302 (53.5)	387 (38.7)	<0.001
You or people living with you got infected (yes)	120 (21.3)	144 (14.4)	0.001
Got sufficient infection prevention training for COVID-19 (yes)	388 (68.8)	754 (75.5)	0.004
Strict self-protection for COVID-19 (yes)	435 (77.1)	841 (84.2)	0.001
Current protection can prevent getting infected (yes)	361 (64.0)	768 (76.9)	<0.001
Worried about being infected (yes)	520 (92.2)	776 (77.7)	<0.001
Psychological support from news or social media regarding COVID-19
Very helpful *	106 (18.8)	271 (27.1)	<0.001
Somewhat helpful	117 (20.7)	195 (19.5)
A little helpful	140 (24.8)	220 (22.0)
Not helpful *	67 (11.9)	59 (5.9)
No comment	134 (23.8)	254 (25.4)
Hours each day spent on reading information about the COVID-19 outbreak in past week
< 1 hour/day	78 (13.8)	173 (17.3)	0.012
1–2 hours/day	225 (39.9)	437 (43.7)
3–4 hours/day	138 (24.5)	229 (22.9)
≥5 hours/day *	123 (21.8)	160 (16.0)
Uncertainty regarding effective disease control
Very strong *	157 (27.8)	134 (13.4)	<0.001
Strong *	228 (40.4)	348 (34.8)
Low *	173 (30.7)	481 (48.1)
None *	6 (1.1)	36 (3.6)
Impact of event
Sub-clinical *	19 (3.4)	397 (39.7)	<0.001
Mild *	135 (23.9)	427 (42.7)
Moderate *	241 (42.7)	158 (15.8)
Severe *	169 (30.0)	17 (1.7)
Mood status
Depressive symptoms
Minimal/no *	82 (14.5)	689 (69.0)	<0.001
Mild *	259 (45.9)	264 (26.4)
Moderate *	129 (22.9)	28 (2.8)
Severe *	94 (16.7)	18 (1.8)
Anxiety symptoms
Minimal/no *	109 (19.3)	755 (75.6)	<0.001
Mild *	286 (50.7)	211 (21.1)
Moderate *	103 (18.3)	16 (1.6)
Severe *	66 (11.7)	17 (1.7)

*Significant after Bonferroni correction.