'I became more aware of my actions'-A qualitative longitudinal study of a health psychological group intervention for patients with myalgic encephalomyelitis/chronic fatigue syndrome.

OBJECTIVES: To explore myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) patients' experiences of a health psychological group intervention and its usefulness, non-usefulness or harmfulness for illness management and adjustment. DESIGN: A qualitative longitudinal study using inductive content analysis. METHODS: Semistructured interviews were conducted with 10 adults. Interviews were conducted before the 16-week intervention, immediately after its completion, and at 3 months after completion. RESULTS: Participants reported that the intervention was useful and not harmful. The model improved their ability to cope with ME/CFS by providing them with useful information about the illness along with peer support and professional guidance. Participants reported improved illness management and adjustment, which they perceived as an outcome of achieving new ways of thinking, feeling and acting. CONCLUSIONS: Participants viewed the health psychological approach to group intervention as meeting their needs. To achieve better illness management and adjustment, more consideration should be given to supportive interactional processes with peers and healthcare professionals. PATIENT OR PUBLIC CONTRIBUTION: The intervention was developed to meet patients' needs of finding ways to manage their illness. The research team consulted eight patients with ME/CFS and three clinical centres working with ME/CFS treatment and rehabilitation at the intervention planning stage. Their comments influenced the planning and content of the intervention as well as ethical issues that should be considered, such as potential harm to participants. All participants were informed about the theoretical foundations of the study and the principles guiding the intervention. Participants were not involved in the data analysis. CLINICAL TRIAL REGISTRATION: NCT04151693.