Association between Participation in a Rehabilitation Program and 1-Year Survival in Patients Requiring Prolonged Mechanical Ventilation

Background: The present study evaluated the association between participation in a rehabilitation program during a hospital stay and 1-year survival of patients requiring at least 21 days of mechanical ventilation (prolonged mechanical ventilation [PMV]) with various respiratory diseases as their main diagnoses that led to mechanical ventilation.Methods: Retrospective data of 105 patients (71.4% male, mean age 70.1 +/- 11.3 years) who received PMV in the past 5 years were analyzed. Rehabilitation included physio-therapy, physical rehabilitation, and dysphagia treatment program that was individually provided by physiatrists.Results: The main diagnosis leading to mechanical ventilation was pneumonia (n=101, 96.2%) and the 1-year survival rate was 33.3% (n=35). One-year survivors had low-er Acute Physiology and Chronic Health Evaluation (APACHE) II score (20.2 +/- 5.8 vs. 24.2 +/- 7.5, p=0.006) and Sequential Organ Failure Assessment score (6.7 +/- 5.6 vs. 8.5 +/- 2.7, p=0.001) on the day of intubation than non-survivors. More survivors participated in a rehabilitation program during their hospital stays (88.6% vs. 57.1%, p=0.001). The rehabilitation program was an independent factor for 1-year survival based on the Cox proportional hazard model (hazard ratio, 3.513; 95% confidence interval, 1.785 to 6.930; p<0.001) in patients with APACHE II scores <= 23 (a cutoff value based on Youden's in- dex).Conclusion: Our study showed that participation in a rehabilitation program during hospital stay was associated with an improvement of 1-year survival of PMV patients who had less severe illness on the day of intubation.