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

Table 4 Sensitivity to hospital-onset definition during phase 1

Cut-off	2 days	7 days	14 days
Observed mean LoS, days	8.102	16.903	27.423
Unadjusted counterfactual^a, mean LoS, days	8.076	16.894	27.460
Implied excess days per infection	1.3	0.2	− 1.0
Counterfactual^a mean LoS, adjusted for confounding, days	8.063	16.842	27.366
Implied excess days per infection	2.0	1.8	1.5

ISSN: 1471-2334