Table 3. Regression Analysis of Hospital and ICU Length of Stay.

Variable	Exponentiated coefficient (95% CI)	P value	R a
Hospital length of stayb
Steroid treatment (≤2 d)	0.94 (0.81-1.09)	.42	0.02
Remdesivir treatment (≤2 d)	1.30 (1.08-1.56)	.006	0.08
Non-US center	2.20 (1.60-3.02)	<.001	0.25
No. of abnormal inflammatory mediators	1.10 (1.06-1.14)	<.001	0.14
Bacterial or viral coinfection at admission	1.19 (1.04-1.38)	.01	0.07
Obesity or comorbidity	1.18 (1.07-1.30)	.001	0.10
WHO ordinal scale ≥4 or ICU admission within ≤2 d of admission	1.48 (1.34-1.64)	<.001	0.22
Not non-Hispanic White	0.98 (0.90-1.08)	.72	0.01
Age	1.01 (1.00-1.02)	.01	0.07
Steroid treatment (≤2 d) × No. of abnormal inflammatory mediators	1.04 (0.98-1.11)	.20	0.04
ICU length of stayc
Steroid treatment (≤2 d)	1.03 (0.79-1.35)	.83	0.01
No. of abnormal inflammatory mediators	1.07 (0.99-1.15)	.09	0.09
Non-US center	2.05 (1.27-3.29)	.004	0.23
Remdesivir treatment (≤2 d)	1.10 (0.83-1.47)	.50	0.03
Bacterial or viral coinfection at admission	1.30 (1.00-1.69)	.05	0.10
WHO ordinal scale (≥4) at admission	1.35 (1.10-1.66)	.004	0.15
Obesity or comorbidity	1.08 (0.88-1.32)	.45	0.04
Not non-Hispanic White	0.97 (0.81-1.17)	.77	0.02
Age	1.00 (0.99-1.02)	.93	0.004
Steroid treatment (≤2 d) × No. of abnormal inflammatory mediators	1.07 (0.97-1.19)	.17	0.07

Abbreviations: ICU, intensive care unit; WHO, World Health Organization.

^a R is a semipartial correlation between the predictor and the outcome, or the correlation between the predictor and the outcome controlling for the other predictors in the model, and can be interpreted as simple correlations are, with R = 0.10 being considered a small effect, R = 0.30 a medium effect, and R = 0.50 a large effect.

^b R² of the full model 23.9%; n = 1159 because of missing race and ethnicity data for 4 patients.

^c R² of the full model 17.5%.