TABLE 4.

Multivariate regression results—standardized continuous explanatory variables

Outcome variable	Bivariate		Multivariate		Multivariate with control variables
	Coef.	p > |t|	Coef.	p > |t|	Coef.	p > |t|
Moral distress
COVID care frequency
1–10	−0.14	.593	−0.37	.101	−0.34	.116
11–20	0.30	.174	−0.08	.670	0.06	.733
21–50	0.89	<.001	0.40	.034	0.42	.024
>50	1.20	<.001	0.78	.001	0.82	<.001
Leadership communication	−0.56	<.001	−0.41	<.001	−0.39	<.001
PPE/supplies access	0.61	<.001	0.46	<.001	0.41	<.001
Mental health (longer term)
COVID care frequency
1–10	−0.66	.074	−0.64	.079	−0.62	.085
11–20	−0.64	.050	−0.75	.017	−0.69	.030
21–50	−0.32	.300	−0.69	.024	−0.72	.019
>50	0.78	.042	0.37	.326	0.28	.463
Leadership communication	−0.35	.001	−0.20	.086	−0.20	.074
PPE/supplies access	0.25	.026	0.2	.869	0.03	.821
Moral distress (COVID‐19 peak)	1.67	<.001	0.44	.001	0.45	.001

Moral distress was queried about the first peak month of COVID‐19 patients, i.e. April 2020. Mental health was queried about the week before the survey, i.e. late September 2020. The control variables were a dummy indicating intensive care unit or other unit type and years of registered nurse experience.