[Patient-Reported Outcomes (PROs) 3 and 6 Months After Pulmonary Rehabilitation Following COVID-19].

Purpose: If COVID-19 disease sequelae also (co-)affect the respiratory organs, national and international guidelines recommend pulmonary rehabilitation (PR). So far, however, no studies are available from Germany on the course after PR, nor on possible course differences between the two Long COVID subgroups "Ongoing symptomatic COVID-19" and "Post-COVID-19 syndrome" (PCS).

Methods:   In a prospective observational study, patient-reported outcomes (PROs) regarding exertional dyspnea, quality of life, pain, fatigue, depression, and anxiety were assessed at the beginning of PR (T1), end of PR (T2), and after 3 (T3) and 6 months (T4). Statistical analyses were performed using latent difference models.

Results:   There were 224 rehabilitation patients (M_Age=54.4; SD_Age=10.4; 42.0% female) included in the study. During PR, all PROs improved significantly. After PR, improvements either persisted with large pre-post effect sizes (exertional dyspnea, quality of life), decreased slightly to small pre-post effect sizes (depression, fatigue), or decreased to baseline levels (anxiety, pain). PCS patients had greater burdens in depression, fatigue, and pain at baseline, but did not differ in trajectories. Indicators of the severity of the preceding acute phase (oxygen therapy, ICU treatment, ventilation) were associated with higher burdens at T0 in depression, fatigue, and pain, but not with the courses during and after PR. In contrast, female patients showed higher burdens in both depression and fatigue at T1 and higher pre-post effects than male patients.

Conclusion:   The fact that improvements in PROs occurred in both subgroups only during PR, but not during the follow-up period suggests that the changes are not due to the natural healing process but at least partly due to PR. Moreover, the results suggest that both patient groups may benefit from PR. Persisting improvements in exertional dyspnea and quality of life and, to a reduced extent, in depression and fatigue until 6 months after PR, but not in pain and anxiety warrant study of additional multimodal interventions that may be needed to maintain these effects.