Effect of telehealth on hospital utilisation and mortality in routine clinical practice: a matched control cohort study in an early adopter site.

Sensitivity analysis for unobserved confounding The difference-in-difference analysis showed a trend towards more emergency admissions among intervention patients than controls, but the effect size was smaller than in the primary analysis and did not reach statistical significance (difference 0.10 admissions per head, 95% CI −0.06 to 0.26, p=0.220) (see online supplementary table S1 and figures S1 and S2).

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