Marcel Ottiger

Mr. Marcel Ottiger

Faculty of Behavioral and Social Sciences, Chemnitz University of Technology, Chemnitz, Saxony, Germany

Research Focus & Metrics

Academic Career Length

4Years (2023-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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7 July 2024 in BMC Public Health
Verified
Journal Article
Open access
PDF file
MOMarcel Ottiger
Marcel Ottiger
IPIris Poppele
Iris Poppele
NSNaveen Sperling
Naveen Sperling
TSTorsten Schlesinger
Torsten Schlesinger
KMKatrin Müller
Katrin Müller
Background: In addition to several sequelae of post-COVID-19, individuals also experience significant limitations in work ability, resulting in negative consequences for the return-to-work (RTW) process. This systematic review and meta-analysis were conducted to assess the impact of post-COVID-19 on work ability and RTW of individuals previously infected with SARS-CoV-2. Methods: Studies on the work ability and RTW of patients with post-COVID-19 (more than 12 weeks after an acute SARS-CoV-2 infection) were regarded eligible for inclusion. Systematic search of literature was performed up to March 2023 using five databases (MEDLINE, EMBASE, CINAHL, CENTRAL and WHO COVID 19). Study selection followed the Preferred Reporting Items for Systematic Review and Meta-analysis (PRISMA) Statement. A meta-analysis estimated the overall success rate of RTW. The risk of bias of the included studies was evaluated with the Newcastle Ottawa Scale (NOS). Results: 19 relevant studies, published between 2021 and 2023, were included in the systematic review, involving 21.155 patients from 14 different countries. The findings indicate that a significant proportion of individuals with post-COVID-19 experience persistent symptoms and functional impairments, with fatigue being the most prominent symptom. These persistent symptoms can have a considerable (negative) impact on individuals’ physical and psychological capacity to participate in work-related activities, leading to lower work ability and increased absenteeism. The RTW for post-COVID-19 patients is complex, with approximately 60.9% of patients successfully returning to work after 12 or more weeks following SARS-CoV-2 infection. Among those who successfully returning to work, a considerable number need modifications in their work duties or hours to cope with residual impairments. Factors such as workplace accommodations, supportive policies, and occupational rehabilitation programs play a crucial role in facilitating successful RTW. Conclusions: The systematic review underscores the substantial impact of post-COVID-19 on work-related outcomes. The implications of this research highlight the need for healthcare providers, employers, and policymakers to collaborate in creating inclusive work environments and implementing tailored rehabilitation programs to support individuals recovering from post-COVID-19. Further research should focus on long-term follow-up studies with mixed methods to gain a more comprehensive understanding of the long-term consequences of post-COVID-19 on work ability and RTW outcomes. PROSPERO registration number: CRD42023385436.

KMKatrin Müller
Katrin Müller
IPIris Poppele
Iris Poppele
MOMarcel Ottiger
Marcel Ottiger
KZKatharina Zwingmann
Katharina Zwingmann
IBIvo Berger
Ivo Berger
TSTorsten Schlesinger
Torsten Schlesinger
Workers, especially healthcare workers, are exposed to an increased risk for SARS-CoV-2 infection. However, less is known about the impact of rehabilitation on health outcomes associated with post-COVID. This longitudinal observational study examined the changes in physical and neuropsychological health and work ability after inpatient rehabilitation of 127 patients (97 females/30 males; age 21–69 years; Mean = 50.62) who acquired COVID-19 in the workplace. Post-COVID symptoms, functional status, physical performance, neuropsychological health, employment, and work ability were assessed before and after rehabilitation. Group differences relating to sex, professions, and acute COVID status were also analyzed. Except for fatigue, the prevalence of all post-COVID symptoms decreased after rehabilitation. Significant improvements in physical performance and neuropsychological health outcomes were determined. Moreover, healthcare workers showed a significantly greater reduction in depressive symptoms compared to non-healthcare workers. Nevertheless, participants reported poor work ability, and 72.5% of them were still unable to work after discharge from rehabilitation. As most participants were still suffering from the impact of COVID-19 at rehabilitation discharge, ongoing strategies in aftercare are necessary to improve their work ability. Further investigations of this study population at 6 and 12 months after rehabilitation should examine the further course of post-COVID regarding health and work ability status.

Verified
Journal Article
Open access
PDF file
KMKatrin Müller
Katrin Müller
MOMarcel Ottiger
Marcel Ottiger
IPIris Poppele
Iris Poppele
AWAlois Wastlhuber
Alois Wastlhuber
MSMichael Stegbauer
Michael Stegbauer
TSTorsten Schlesinger
Torsten Schlesinger
Background: Rehabilitation is an effective and feasible approach for post-COVID patients to improve physical health. However, knowledge regarding the long-term impact of rehabilitation on the physical health of these patients is lacking. Methods: Changes in physical health of 127 patients with COVID-19 as an occupational disease or work accident were assessed in a longitudinal observational study. Post-COVID symptoms, functional status, functional exercise capacity, endurance capacity, physical performance, quadricep strength, handgrip strength, motor balance ability, and self-reported physical performance were examined at the beginning as well as 6 and 12 months after the rehabilitation. Group differences concerning sex, age, acute COVID status, comorbidities prior to COVID-19, and aftercare interventions were also analysed. Results: Even 12 months after rehabilitation, the prevalence of post-COVID symptoms (28.6–94.7%) remained remarkably high in the study population. Significant improvements in various aspects of physical health were observed 6 (r = 0.288–0.755) and 12 months (r = 0.189–0.681) after the rehabilitation. Participants demonstrated enhanced endurance, strength, and balance function, as well as improvement in subjective physical ability. Significant group differences were observed between younger and older patients, those with mild–moderate and severe–critical COVID-19, and patients with and without pre-existing cardiovascular disease, metabolic disease, psychological disease, neuro-sensory disease, musculoskeletal disease, and exercising in an outpatient group. Conclusions: The study identifies persistent challenges in COVID-19 recovery, despite significant improvements in physical health 6 and 12 months after rehabilitation. Further research and the implementation of standardised approaches are required to enhance the outcomes of post-COVID rehabilitation, with a focus on developing personalised care strategies for long-term recovery.

9 January 2024 in Research Square
Verified
Preprint
Open access
PDF file
MOMarcel Ottiger
Marcel Ottiger
IPIris Poppele
Iris Poppele
NSNaveen Sperling
Naveen Sperling
TSTorsten Schlesinger
Torsten Schlesinger
KMKatrin Müller
Katrin Müller
Background: In addition to several sequelae of post-COVID-19, individuals also experience significant limitations in work ability, resulting in negative consequences for the return-to-work (RTW) process. This systematic review and meta-analysis were conducted to assess the impact of post-COVID-19 on work ability and RTW of individuals previously infected with SARS-CoV-2. Methods: Studies on the work ability and RTW of patients with post-COVID-19 (more than 12 weeks after an acute SARS-CoV-2 infection) were regarded eligible for inclusion. Systematic search of literature was performed up to March 2023 using five databases (MEDLINE, EMBASE, CINAHL, CENTRAL and WHO COVID 19). Study selection followed the Preferred Reporting Items for Systematic Review and Meta-analysis (PRISMA) Statement. A meta-analysis estimated the overall success rate of RTW. The risk of bias of the included studies was evaluated with the Newcastle Ottawa Scale (NOS). Results: 19 relevant studies, published between 2021 and 2023, were included in the systematic review, involving 21.155 patients from 14 different countries. The findings indicate that a significant proportion of individuals with post-COVID-19 experience persistent symptoms and functional impairments, with fatigue being the most prominent symptom. These persistent symptoms can have a considerable (negative) impact on individuals' physical and psychological capacity to participate in work-related activities, leading to lower work ability and increased absenteeism. The RTW for post-COVID-19 patients is complex, with approximately 60.9% of patients successfully returning to work after 12 or more weeks following SARS-CoV-2 infection. Among those who successfully returning to work, a considerable number need modifications in their work duties or hours to cope with residual impairments. Factors such as workplace accommodations, supportive policies, and occupational rehabilitation programs play a crucial role in facilitating successful RTW. Conclusions:The systematic review underscores the substantial impact of post-COVID-19 on work-related outcomes. The implications of this research highlight the need for healthcare providers, employers, and policymakers to collaborate in creating inclusive work environments and implementing tailored rehabilitation programs to support individuals recovering from post-COVID-19. Further research should focus on long-term follow-up studies with mixed methods to gain a more comprehensive understanding of the long-term consequences of post-COVID-19 on work ability and RTW outcomes. PROSPERO registration number: CRD42023385436

21 May 2026 in BMC Public Health
Verified
Journal Article
Open access
PDF file
MOMarcel Ottiger
Marcel Ottiger
IPIris Poppele
Iris Poppele
ASAnchalee Sarah Seefen Soliman
Anchalee Sarah Seefen Soliman
TSTorsten Schlesinger
Torsten Schlesinger
KMKatrin Müller
Katrin Müller
Background: Post-COVID is associated with prolonged impairments in work ability and return-to-work (RTW). The heterogeneity and complexity of post-COVID symptoms present major obstacles to a sustainable RTW. This systematic review aims to identify facilitators and obstacles affecting work ability and RTW. Methods: Eligible studies examined factors affecting work ability or RTW in post-COVID patients. Systematic search of literature was performed up to March 2025 using MEDLINE, CENTRAL, PsycINFO, Scopus, and Web of Science. Study selection followed the Preferred Reporting Items for Systematic Review and Meta-analysis Statement. Risk of bias was evaluated with the “Joanna Briggs Institute Critical Appraisal Tools”. Results: 31 studies published between 2021 and 2025 were included in the analysis. Most originated from Europe and North America with sample sizes reaching from small qualitative studies to large registry-based cohort studies. The identified factors ( N = 59; facilitators: n = 25, obstacles: n = 34) could be grouped into four domains: Disease-related factors associated with SARS-CoV-2 infection ( n = 8), Individual biopsychosocial factors ( n = 35), Contextual workplace factors ( n = 10), Healthcare system and service-related factors ( n = 6). The most frequently reported obstacles were fatigue and neurocognitive impairments, stigmatization, lack of managerial support, and rigid RTW policies. Adequate workplace adjustments, interprofessional therapeutic interventions, and self-management strategies facilitate work ability and RTW. Conclusions: Work ability and RTW with post-COVID is determined by complex multilevel interactions of biopsychosocial, workplace-related, and systemic factors. Findings suggest that coordinated care and workplace adaptations may help to bridge the gap between medical recovery and occupational participation. Future research should aim to better understand how multiple factors interact in individual cases to develop targeted, evidence-based interventions and policy frameworks. PROSPERO registration number: CRD420251010826.