Table 1

Effect estimates associated with enrolment to CO@h for each study outcome, after matching and adjusted for smoking, comorbidities and prior healthcare utilisation

Outcome	Adjusted OR	SE	P value	95% CI		Denominator
Outcome	Adjusted OR	SE	P value	Lower	Upper	Denominator
Death within 28 days	0.42	0.16	0.022	0.20	0.88	15 327†
Any ED attendance within 28 days	1.43	0.13	<0.001	1.20	1.71	15 621
Any hospital admission within 28 days	1.68	0.17	<0.001	1.38	2.04	15 621
Any level 2/3 care of those admitted	0.43	0.15	0.019	0.21	0.87	2,249*

	Adjusted IRR	SE	P value	Lower	Upper	Denominator
Length of stay (days) of those admitted	0.996	0.078	0.963	0.85	1.16	2135

*No critical care use of those admitted in April/May or mixed/multiple ethnic groups or underweight group.
†No deaths in November/April/May or mixed/multiple ethnic groups.
CO@h, COVID-19 Oximetry @home; IRR, incidence rate ratio; OR, Odds ratio; SE, Standard error.