Table 4.

Factors related to post-traumatic stress disorder

Characteristics	Classification	OR	95% CI
Age	20–29	1.00
	≥ 30	1.44	0.57–3.61
Children	Yes	1.38	0.60–3.17
	No	1.00
Work period	< 5	1.00
	≥ 5	1.19	0.42–3.37
Working department	National Designated Isolation Unit wards	2.85	1.21–6.71
	General ward	1.00
	Intensive care units	1.47	0.71–3.04
	Others	0.17	0.04–0.68
Salary (10,000won/month)	< 300	1.03	0.41–2.55
	≥ 300	1.00
Ambient noise	Little	1.00
	Moderate	2.11	0.95–4.65
	A lot	1.72	0.70–4.22
Nursing workload	Low	1.00
	Moderate	1.59	0.25–10.16
	High	3.62	0.51–25.58
Nurse staffing	Poor	3.03	1.01–9.10
	Fair	4.10	1.47–11.46
	Good	1.00
Frequency of changes to COVID-19 guidelines	No/occasionally	1.00
	Moderate	1.52	0.71–3.28
	Frequently	2.14	0.99–4.62
Education of new infectious disease	Yes	1.68	0.87–3.25
	No	1.00
Presence of COVID-19 suspected symptoms	Yes	3.83	1.89–7.75
	No	1.00

CI Confidence interval, OR Odds ratio, PTSD post-traumatic stress disorder