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Objectives The potential and expected benefits of digital health interventions (DHI) have long been discussed, yet substantial challenges are associated with deploying DHI at scale. Insights are presented concerning the implementation of a DHI consisting of a patient-facing app and a digital dashboard for clinicians providing supported self-management for long COVID to support both clinicians and patients.Design Qualitative reflexive thematic analysis, mapped against Normalisation Process Theory.Setting Fifty-five and a half hours of zoom recordings of meetings between clinicians in community and secondary care long COVID clinics and members of the research team.Participants Allied health professionals, service delivery managers and members of the core team, including representatives from industry partners.Results The DHI fitted with contextual circumstances and the design supported flexibility to suit circumstances in different trusts. The DHI also aligned with existing ways of working.Healthcare professionals worked together to support the implementation of the DHI, requiring flexibility to take account of local circumstances. The DHI was appraised in both positive and negative terms by healthcare professionals. Using DHIs was said to have the potential to complement care but not be a replacement for face-to-face clinical input. The DHI was judged to have demonstrated the potential to affect long-established patterns and organisational structures of engagement between healthcare professionals and patients in terms of access to care.Conclusions NPT provided a framework for considering both individual agency and the organisation context, enabling reflections to be made at the level of the structure of services as well as people’s experiences. The discipline of considering first the context, then the work and finally the practical effects helped place order on the ‘mess’ involved in the rapid cycle of developing, refining and implementing a DHI in an atypical environment (a pandemic).

Objectives To describe self-reported characteristics and symptoms of treatment-seeking patients with post-COVID-19 syndrome (PCS). To assess the impact of symptoms on health-related quality of life (HRQoL) and patients’ ability to work and undertake activities of daily living.Design Cross-sectional single-arm service evaluation of real-time user data.Setting 31 post-COVID-19 clinics in the UK.Participants 3754 adults diagnosed with PCS in primary or secondary care deemed suitable for rehabilitation.Intervention Patients using the Living With Covid Recovery digital health intervention registered between 30 November 2020 and 23 March 2022.Primary and secondary outcome measures The primary outcome was the baseline Work and Social Adjustment Scale (WSAS). WSAS measures the functional limitations of the patient; scores of ≥20 indicate moderately severe limitations. Other symptoms explored included fatigue (Functional Assessment of Chronic Illness Therapy–Fatigue), depression (Patient Health Questionnaire–Eight Item Depression Scale), anxiety (Generalised Anxiety Disorder Scale, Seven-Item), breathlessness (Medical Research Council Dyspnoea Scale and Dyspnoea-12), cognitive impairment (Perceived Deficits Questionnaire, Five-Item Version) and HRQoL (EQ-5D). Symptoms and demographic characteristics associated with more severe functional limitations were identified using logistic regression analysis.Results 3541 (94%) patients were of working age (18-65); mean age (SD) 48 (12) years; 1282 (71%) were female and 89% were white. 51% reported losing ≥1 days from work in the previous 4 weeks; 20% reported being unable to work at all. Mean WSAS score at baseline was 21 (SD 10) with 53% scoring ≥20. Factors associated with WSAS scores of ≥20 were high levels of fatigue, depression and cognitive impairment. Fatigue was found to be the main symptom contributing to a high WSAS score.Conclusion A high proportion of this PCS treatment-seeking population was of working age with over half reporting moderately severe or worse functional limitation. There were substantial impacts on ability to work and activities of daily living in people with PCS. Clinical care and rehabilitation should address the management of fatigue as the dominant symptom explaining variation in functionality.