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Specialist Healthcare Intervention and Follow-up Trends in Post-Acute COVID-19 Hospitalization as Compared to Other
Marta Colaneri1,2,3, Alessia Antonella Galbussera4, Mauro Tettamanti5
1Department of Biomedical and Clinical Sciences, Infectious and Tropical Diseases Operational Unit, ASST Fatebenefratelli Sacco, "L. Sacco" University Hospital, Via Giovanni Battista Grassi, 20157, Milan, Italy.
Introduction:
Post-acute sequelae of COVID-19, often referred to as "long COVID," have raised concerns about increased healthcare utilization following hospitalization. Whether these patterns differ significantly from those observed after other acute respiratory infections (ARIs) remains unclear. This study aimed to compare post-discharge healthcare use between patients hospitalized for COVID-19 and those with other ARIs in Lombardy, Italy.
Methods:
We conducted a population-based cohort study using 2021 administrative healthcare data from the Lombardy Region. Patients aged ≥ 40 years hospitalized for COVID-19 or other ARIs were followed for 12 months post-discharge. We evaluated specialist consultations, rehospitalizations, diagnostic testing, and new chronic drug treatment initiations. Logistic regression models adjusted for age, sex, and comorbidities (Drug-Derived Complexity Index) were used to assess differences.
Results:
Among 57,795 patients, 35,458 were hospitalized for COVID-19 and 21,375 for other ARIs. Patients with COVID-19 were younger and had lower comorbidity burden and post-discharge mortality (10.7% vs. 33.5%). A higher proportion received at least one specialist visit (75.8% vs. 70.3%), though with a longer median time to first visit (63 vs. 45 days, p < 0.0001). Patients with COVID-19 had more frequent imaging and spirometry but initiated fewer chronic drug treatments overall. However, a higher prescription rate for antidiabetics (OR 1.42), psychoanaleptic (OR 1.21), and genitourinary/hormonal drugs (OR 1.29) emerged after COVID-19 hospitalizations: this rate remained statistically higher for antidiabetics even after excluding subjects who died in the year following discharge. Hospitalizations for causes other than COVID-19 were more frequent in patients with ARI.
Conclusions:
Compared to other ARIs, COVID-19 survivors exhibited distinct post-discharge healthcare patterns, with delayed but focused specialist care and selective increases in diagnostic and pharmacological interventions.
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