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 | |
| Lower | Upper | |||||
| 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.