Epidemiological and Outcomes Research
This chapter assembles the epidemiological and outcomes evidence for ME/CFS. It covers the prevalence and incidence of the disease, the risk factors associated with onset, and the natural history — how patients recover, fluctuate, or worsen over time. It then examines the consequences of the illness: quality of life and disability, mortality, and the burden of comorbid conditions, with particular attention to reproductive health. The chapter closes with structured speculations that connect epidemiological patterns to proposed mechanisms, generating testable hypotheses for future research.
For patients: read the prevalence and outcome sections to understand how common ME/CFS is and what the typical course looks like.
For caregivers: read the prevalence and outcomes sections for context on the illness and its burden.
For clinicians: read the epidemiology sections for prevalence, risk factors, and outcomes to inform prognosis counselling.
For researchers: read the prevalence-and-incidence, risk-factor, and natural-history sections, then the outcomes sections, for the evidence base.