Table 2. Multivariable negative binomial regression with daily number of medical and surgical hospital admissions per day as the outcome comparing March 16-September 23, 2020 (post COVID-19 public health measures) to March 16-September 23, 2019.

		Negative binomial
Covariates	IRR	95%CI	p-value
Medical Admissions
Time period	0.10	0.10,0.10	<0.01
Post COVID-19 public health measures	0.86	0.83,0.90	<0.001
Sex—Male	0.50	0.35,0.73	<0.001
Age at admission	1.01	1.00,1.02	<0.05
Charlson Comorbidity Index	1.11	1.02,1.21	<0.05
Surgical Admissions
Time period	0.10	0.10,1.00	<0.001
Post COVID-19 public health measures	0.82	0.78,0.87	<0.001
Sex—Male	1.11	0.87,1.42	>0.05
Age at admission	1.00	0.99,1.00	>0.05
Charlson Comorbidity Index	1.03	0.94,1.13	>0.05

Abbreviations: CI (confidence interval); IRR (incident rate ratio).