Early Rehabilitation Interventions and Physical Therapy in Adults Who Were Critically Ill With COVID-19 Pneumonia: A Retrospective Observational Study

Abstract

Objective: The primary objective of this observational study was to analyze the time to the first edge-of-bed (EOB) mobilization in adults who were critically ill with severe versus non-severe COVID-19 pneumonia. Secondary objectives included the description of early rehabilitation interventions and physical therapy delivery.

Methods: All adults with laboratory-confirmed COVID-19 requiring intensive care unit admission for ≥72 hours were included and divided according to their lowest PaO2/FiO2 ratio into severe (≤100 mmHg) or non-severe (>100 mmHg) COVID-19 pneumonia. Early rehabilitation interventions consisted of in-bed activities, EOB or out-of-bed mobilizations, standing, and walking. The Kaplan-Meier estimate and logistic regression were used to investigate the primary outcome time-to-EOB and factors associated with delayed mobilization.

Results: Among the 168 patients included in the study (mean age = 63 y [SD = 12 y]; Sequential Organ Failure Assessment = 11 [interquartile range = 9-14]), 77 (46%) were classified as non-severe, and 91 (54%) were classified as severe COVID-19 pneumonia. Median time-to-EOB was 3.9 days (95% CI = 2.3-5.5) with significant differences between subgroups (non-severe = 2.5 days [95% CI = 1.8-3.5]; severe = 7.2 days [95% CI = 5.7-8.8]). Extracorporeal membrane oxygenation use and high Sequential Organ Failure Assessment scores (adjusted effect = 13.7 days [95% CI = 10.1-17.4] and 0.3 days [95% CI = 0.1-0.6]) were significantly associated with delayed EOB mobilization. Physical therapy started within a median of 1.0 days (95% CI = 0.9-1.2) without subgroup differences.

Conclusion: This study shows that early rehabilitation and physical therapy within the recommended 72 hours during the COVID-19 pandemic could be maintained regardless of disease severity. In this cohort, the median time-to-EOB was fewer than 4 days, with disease severity and advanced organ support significantly delaying the time-to-EOB.

Impact: Early rehabilitation in the intensive care unit could be sustained in adults who are critically ill with COVID-19 pneumonia and can be implemented with existing protocols. Screening based on the PaO2/FiO2 ratio might reveal patients at risk and increased need for physical therapy.

Keywords: COVID-19; Critical Illness; Early Ambulation; Early Mobilization; Muscle Weakness; Physical Therapy Specialty; Physiotherapy; Rehabilitation.