Table 3 Summary of results showing the estimated excess LoS due to hospital-onset SARS-COV-2 infection, with and without confounding adjustment using inverse probability weights
Phase 1 Mar–Jun 2020 | Phase 2 Sep–Dec 2020 | Phase 3 Jan–Apr 2021 | Phase 4 May–Aug 2021 | |
|---|---|---|---|---|
Observed mean LoS, days | 8.102 | 8.358 | 8.502 | 8.454 |
Unadjusted counterfactuala mean LoS, days | 8.076 | 8.322 | 8.488 | 8.448 |
Implied excess days per infection (95% CI) | 1.3 (1.1, 1.5) | 1.0 (0.8, 1.1) | 0.8 (0.6, 1.0) | 1.5 (1.1, 1.9) |
Counterfactuala mean LoS, adjusted for confounding, days | 8.063 | 8.309 | 8.486 | 8.448 |
Implied excess days per infection (95% CI) | 2.0 (1.8, 2.2) | 1.4 (1.2, 1.6) | 0.9 (0.7, 1.1) | 1.5 (1.1, 1.9) |