Estimation of the impact of hospital-onset SARS-CoV-2 infections on length of stay in English hospitals using causal inference

Table 5 Summary of results showing the estimated excess LoS including re-admissions due to hospital-onset SARS-COV-2 infection, with and without confounding adjustment using inverse probability weights

Phase	Phase 1 Mar–Jun 2020
Observed mean LoS, days	9.048
Unadjusted counterfactual^a mean LoS, days	9.010
Implied excess days per infection (95% CI)	1.9 (1.7, 2.1)
Counterfactual^a mean LoS, adjusted for confounding, days	9.007
Implied excess days per infection (95% CI)	2.0 (1.8, 2.2)

ISSN: 1471-2334