Behavior problems in children and adolescents with chronic physical illness: a meta-analysis.
Pinquart, Martin, Shen, Yuhui · Journal of pediatric psychology · 2011 · DOI
Quick Summary
This large review of 569 studies found that children and teenagers with chronic physical illnesses—including ME/CFS—experience higher rates of emotional and behavioral problems compared to healthy peers. Children with ME/CFS showed particularly high levels of emotional problems like anxiety and depression. The review emphasizes that doctors should routinely screen young patients with chronic illnesses for psychological distress and refer them to mental health services when needed.
Why It Matters
This meta-analysis provides robust evidence that ME/CFS in young people is associated with significant psychological and emotional burden beyond physical symptoms. For ME/CFS patients and families, it validates that emotional and behavioral difficulties are common and warrant professional mental health support as part of comprehensive care. For researchers, it highlights the need to standardize psychological assessment in pediatric ME/CFS studies and investigate mechanisms linking illness severity to mental health outcomes.
Observed Findings
Children and adolescents with chronic physical illness have significantly elevated internalizing problems (emotional/anxiety symptoms) with a standard mean difference of 0.47.
Externalizing problems (behavioral/conduct problems) are also elevated but to a lesser degree (standard mean difference of 0.22).
ME/CFS showed the strongest elevation in internalizing problems compared to other chronic illnesses studied.
Parental ratings reported larger effect sizes than adolescent self-ratings, suggesting potential differences in symptom perception between observers.
Effect sizes varied by country, age, gender, and study design, indicating heterogeneity in study populations and methods.
Inferred Conclusions
Young people with chronic physical illness, particularly ME/CFS, experience elevated rates of emotional and behavioral problems requiring clinical attention.
Regular psychological screening and mental health referrals should be integrated into standard care for children and adolescents with chronic illness.
Reporting source (parent, teacher, or self-report) significantly influences measured levels of behavioral problems and should be considered in clinical assessment.
Remaining Questions
Does chronic illness cause new-onset psychological problems, or do pre-existing vulnerabilities increase susceptibility to both illness and behavioral problems?
What This Study Does Not Prove
This meta-analysis does not establish whether behavioral problems are caused by chronic illness, are pre-existing vulnerabilities, or result from social/educational disruption due to illness. The reliance on different behavioral rating scales across studies may conflate true psychological distress with reporting bias or differences in informant perception. The study does not differentiate between age-appropriate stress reactions and clinical psychiatric disorders requiring intervention.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
What specific mechanisms link ME/CFS severity, disease duration, and functional impairment to the development of internalizing problems?
How do different treatment approaches (medical, psychological, rehabilitation) affect behavioral and emotional outcomes in youth with ME/CFS?
Do behavioral problems in ME/CFS patients improve with illness recovery, or do they persist as independent concerns requiring sustained mental health intervention?