Predictors of chronic "postviral" fatigue

Area of Science:

• General Practice
• Infectious Diseases
• Psychology

Background:

• Viral illnesses are common reasons for general practitioner (GP) visits.
• A significant minority of patients report persistent fatigue following viral infections, termed postviral fatigue.
• Factors influencing the development of chronic fatigue post-infection require further investigation.

Purpose of the Study:

• To investigate the relationship between a GP diagnosis of viral illness and the subsequent development of chronic fatigue.
• To identify predictors of chronic fatigue 6 months after a viral diagnosis in primary care.

Main Methods:

• Prospective cohort study of 618 subjects diagnosed with viral illness by GPs in England.
• Fatigue assessed via questionnaire at 6 months post-diagnosis.
• Analysis included risk ratios and logistic regression to identify predictors.

Main Results:

• 17.5% of subjects met criteria for chronic fatigue at 6 months.
• Chronic fatigue risk was higher (RR 1.45) compared to non-postviral GP attenders.
• Somatic attributional style, less definite GP diagnosis, and sick certification predicted chronic fatigue.
• Infective symptoms did not predict later fatigue; psychiatric morbidity and virus vulnerability beliefs were associated with self-reported postviral fatigue.

Conclusions:

• Chronic fatigue 6 months post-GP-diagnosed viral illness is primarily associated with patient attributional style and GP behavior.
• The characteristics of the viral illness itself are less predictive of long-term fatigue.
• Some cases of apparent postviral fatigue may stem from pre-existing or unrelated factors.