Predictors of Persistent Medically Unexplained Physical Symptoms: Findings From a General Population Study

Area of Science:

• Psychiatry
• General Practice
• Epidemiology

Background:

• Medically Unexplained Symptoms (MUS) present a significant challenge in primary care.
• Understanding the long-term course and predictors of MUS is crucial for effective management.
• Previous research has identified various factors associated with MUS, but long-term persistence data in the general population is limited.

Purpose of the Study:

• To investigate the persistence rate of Medically Unexplained Symptoms (MUS) in the adult general population.
• To identify prognostic factors associated with the persistence of MUS over a three-year period.

Main Methods:

• Utilized data from the Netherlands Mental Health Survey and Incidence Study-2 (NEMESIS-2), a large-scale, nationally representative cohort study.
• Included adult participants (aged 18-64) with MUS at baseline (N=324), reassessed after three years.
• Employed logistic regression analyses to determine risk factors for MUS persistence.

Main Results:

• 36.4% of individuals with MUS at baseline exhibited persistent symptoms at the three-year follow-up.
• Factors predicting persistent MUS included parental psychopathology, a higher number of comorbid chronic medical disorders, and poorer physical functioning.
• Specifically, parental psychopathology (OR 2.01), number of chronic medical disorders (OR 1.19), and physical functioning (OR 0.99) were significant predictors in the fully adjusted model.

Conclusions:

• Medically Unexplained Symptoms (MUS) demonstrate significant persistence in the adult general population, affecting over a third of individuals.
• Parental psychopathology, the burden of chronic medical conditions, and impaired physical functioning are key predictors of persistent MUS.
• These findings highlight the need for targeted early interventions and treatment strategies for individuals at higher risk of persistent MUS.