Symptom-based survey diagnoses may serve to identify more homogenous sub-groups of fatigue and postviral diseases

Background and objective A range of diagnostic criteria are applied for the heterogenous patient group with fatigue or postviral fatigue syndromes with or without Post Exertional Malaise (PEM). We explored whether DePaul Symptom Questionnaires (DSQ) based symptoms reported in an open online survey called MECOV, served to identify more homogenous sub-groups.