ME/CFS Evidence Browser — Classified Studies on Myalgic Encephalomyelitis

481–500 of 6,122 studies

E0 ConsensusReviewPEM not requiredMeta-Analysis

Anxiety in children and adolescents with chronic physical illnesses: a meta-analysis.

Pinquart, Martin, Shen, Yuhui·Acta paediatrica (Oslo, Norway : 1992)·2011

A large review of 332 studies found that children with chronic illnesses reported higher levels of anxiety compared to healthy peers, with an average difference of 0.18 standard deviation units. Children with chronic fatigue syndrome, migraine, hearing or vision problems, and epilepsy showed the strongest associations with elevated anxiety. However, this review combined results from many different studies using varying methods, so the strength of these associations may differ depending on how each study measured anxiety and illness.

E0 ConsensusReviewPEM not requiredSystematic-Review

Chronic fatigue syndrome.

Reid, Steven, Chalder, Trudie, Cleare, Anthony et al.·BMJ clinical evidence·2011

This review looked at treatments for ME/CFS by examining 46 high-quality studies published up to March 2010. The researchers assessed which treatments—including antidepressants, exercise therapy, cognitive behavioral therapy, and supplements—actually work and are safe. The review shows that ME/CFS affects less than 3% of people, with more women than men experiencing the condition.

E0 ConsensusReviewPEM not requiredSystematic-Review

Homeopathic treatments in psychiatry: a systematic review of randomized placebo-controlled studies.

Davidson, Jonathan R T, Crawford, Cindy, Ives, John A et al.·The Journal of clinical psychiatry·2011

A 2011 systematic review examined whether homeopathic treatments help psychiatric conditions by pooling results from 25 randomized placebo-controlled trials. The review reported that homeopathy was associated with improvements in functional somatic syndromes (fibromyalgia and chronic fatigue syndrome), but not for anxiety or stress; however, the overall evidence base is described as very limited, and the authors note that results do not rule out the possibility of some benefit.

Sleep

E0 ConsensusReviewPEM unclearReview-Narrative

Sleep, pain, fibromyalgia, and chronic fatigue syndrome.

Landis, Carol A·Handbook of clinical neurology·2011

This review examined the connections between sleep problems, pain, fibromyalgia, and chronic fatigue syndrome (ME/CFS). The author looked at existing research to understand how poor sleep and pain symptoms often occur together in these conditions and how they may be related to each other.

SleepPain and Sensitization

E0 ConsensusReviewPEM unclearObservational

Treating chronic fatigue syndrome - a study into the scientific evidence for pharmacological treatments.

Kreijkamp-Kaspers, Sanne, Brenu, Ekua Weba, Marshall, Sonya et al.·Australian family physician·2011

This study looked at what medicines and supplements 94 people with ME/CFS were taking and checked what scientific evidence supported their use. The patients were using hundreds of different treatments, with antidepressants, pain relievers, sleep aids, and B vitamins being the most common. However, when researchers searched for rigorous studies proving these treatments work for ME/CFS, they found very limited evidence—only 20 good-quality trials existed for the medicines patients were using.

Interventions

E0 ConsensusReviewPEM not requiredSystematic-Review

Somatization in Latin America: a review of the classification of somatoform disorders, functional syndromes and medically unexplained symptoms.

Tófoli, Luís Fernando, Andrade, Laura Helena, Fortes, Sandra·Revista brasileira de psiquiatria (Sao Paulo, Brazil : 1999)·2011

This review examined how people in Latin America report physical symptoms that doctors cannot explain with standard medical tests. The researchers looked at over 100 studies published between 1995 and 2011 to understand whether Latin American patients truly have more unexplained symptoms, or whether cultural and language differences affect how symptoms are described and understood.

E0 ConsensusReviewPEM not requiredMeta-Analysis

Depressive symptoms in children and adolescents with chronic physical illness: an updated meta-analysis.

Pinquart, Martin, Shen, Yuhui·Journal of pediatric psychology·2011

This meta-analysis combined results from 340 studies to examine whether children and teenagers with chronic physical illnesses experience higher levels of depressive symptoms than healthy peers. On average, young people with chronic illnesses showed elevated depressive symptoms compared to controls, with the strongest associations observed in conditions like chronic fatigue syndrome, fibromyalgia, and migraine. However, the overall effect size was modest, and results varied depending on study design and population characteristics.

E0 ConsensusReviewPEM not requiredSystematic-Review

Hypothalamic-pituitary-adrenal axis dysfunction in chronic fatigue syndrome.

Papadopoulos, Andrew S, Cleare, Anthony J·Nature reviews. Endocrinology·2011

ME/CFS patients often have abnormal levels of cortisol, a stress hormone produced by the body. This review found that people with ME/CFS tend to have lower cortisol levels than healthy people, with less variation throughout the day and a weaker response to stress. These hormone changes are linked to worse symptoms and disability, and treatments like cognitive behavioral therapy may help restore more normal cortisol levels.

Endocrine Disruption

E0 ConsensusReviewPEM not requiredSystematic-Review

Mindfulness-based stress reduction for people with chronic diseases.

Merkes, Monika·Australian journal of primary health·2010

This review looked at 15 studies testing whether mindfulness meditation programs (called MBSR) help people with chronic illnesses feel better. The studies included people with ME/CFS, fibromyalgia, chronic pain, and other long-term conditions. All 15 studies found that people who participated in these programs experienced improvements in their symptoms, mood, and quality of life, with no negative effects reported.

Interventions

E0 ConsensusReviewPEM not requiredReview-Narrative

Clinical uses of melatonin: evaluation of human trials.

Sánchez-Barceló, E J, Mediavilla, M D, Tan, D X et al.·Current medicinal chemistry·2010

This review examined decades of clinical trials testing melatonin for various health conditions, including chronic fatigue syndrome. The authors reported that melatonin appears to have the strongest evidence for sleep problems related to ageing and circadian rhythm disorders, and some support for conditions like macular degeneration and irritable bowel syndrome. However, the review noted that preliminary data are still needed to clarify whether melatonin helps with chronic fatigue syndrome, fibromyalgia, and several other conditions.

Sleep

E0 ConsensusReviewPEM not requiredMeta-Analysis

Possible detrimental effects of cognitive behaviour therapy for chronic fatigue syndrome.

Heins, Marianne J, Knoop, Hans, Prins, Judith B et al.·Psychotherapy and psychosomatics·2010

This study looked at whether cognitive behaviour therapy (CBT) makes ME/CFS worse for some patients. Researchers combined data from three separate trials and found that patients getting CBT were no more likely to experience symptom worsening than patients not receiving treatment. The researchers concluded that CBT appears to be a safe treatment for ME/CFS.

E0 ConsensusReviewPEM not requiredMeta-Analysis

Cognitive functioning in chronic fatigue syndrome: a meta-analysis.

Cockshell, S J, Mathias, J L·Psychological medicine·2010

This study combined results from 50 research papers to understand how ME/CFS affects thinking and memory. Researchers found that people with ME/CFS have real, measurable problems with attention, memory, and processing speed—essentially, the brain takes longer to handle and organize information. However, other thinking skills like vocabulary, reasoning, and basic motor skills were not affected.

Cognitive Impairment

E0 ConsensusReviewPEM not requiredReview-Narrative

Chronic fatigue syndrome: is there a role for non-antidepressant pharmacotherapy?

Van Houdenhove, Boudewijn, Pae, Chi-Un, Luyten, Patrick·Expert opinion on pharmacotherapy·2010

This review examined whether medications can help ME/CFS patients. Researchers looked at studies from 1988 to 2009 and found that while some drugs (like antivirals and antibiotics) might temporarily help symptoms, they can also cause more harm than good. A few stimulant medications helped some patients, but the long-term safety is unclear. The authors concluded that medications alone are not the best first-line treatment and work best alongside self-management and rehabilitation.

E0 ConsensusReviewPEM unclearReview-Narrative

Psychiatric aspects of chronic fatigue syndrome and fibromyalgia.

Van Houdenhove, Boudewijn, Kempke, Stefan, Luyten, Patrick·Current psychiatry reports·2010

This review examines how ME/CFS and fibromyalgia are connected to psychiatric symptoms like depression and stress. The authors explain that these conditions involve overlapping physical symptoms—extreme tiredness, difficulty with activity, brain fog, and widespread pain—that often start after infections or injuries. They suggest that the best approach for patients is personalized lifestyle management and self-care tailored to individual needs, rather than a one-size-fits-all treatment.

Sleep

E0 ConsensusReviewPEM not requiredSystematic-Review

The genetics and epigenetics of fatigue.

Landmark-Høyvik, Hege, Reinertsen, Kristin V, Loge, Jon H et al.·PM & R : the journal of injury, function, and rehabilitation·2010

This study reviewed scientific literature to understand whether genetics (inherited traits) and epigenetics (chemical changes that affect how genes work) influence fatigue in people with ME/CFS and other conditions. The researchers found that while some biological systems appear to malfunction in people with persistent fatigue, no clear genetic or epigenetic markers have been reliably identified yet. The authors argue that future research needs to be larger, better-designed, and consider how genes, environment, and body systems work together.

BiomarkersEndocrine Disruption

E0 ConsensusReviewPEM unclearSystematic-Review

Alternative medical interventions used in the treatment and management of myalgic encephalomyelitis/chronic fatigue syndrome and fibromyalgia.

Porter, Nicole S, Jason, Leonard A, Boulton, Aaron et al.·Journal of alternative and complementary medicine (New York, N.Y.)·2010

This review looked at 70 research studies testing complementary and alternative treatments for ME/CFS and fibromyalgia. The researchers found that most studies (86%) reported at least some positive effect from the treatments tested, with acupuncture, meditation practices, and supplements like magnesium and L-carnitine showing the most promise. However, the quality of these studies varied widely, making it difficult to draw firm conclusions about which treatments actually work.

Interventions

E0 ConsensusReviewPEM not requiredSystematic-Review

Evidence for overlap between urological and nonurological unexplained clinical conditions.

Rodríguez, María Angeles Bullones, Afari, Niloofar, Buchwald, Dedra S et al.·The Journal of urology·2009

This study examined whether several poorly understood chronic pain and fatigue conditions tend to occur together in the same patients. Researchers reviewed over 1,000 published studies and found strong evidence that conditions like chronic pelvic pain, bladder pain, fibromyalgia, ME/CFS, and irritable bowel syndrome frequently overlap—sometimes occurring together in up to 79% of patients. This suggests these conditions may share common underlying causes rather than being completely separate diseases.

E0 ConsensusReviewPEM not requiredReview-Narrative

[Biomedical and psychosocial treatment of fatigue in functional somatic syndrome].

Oka, Takakazu, Kanemitsu, Yoshio·Nihon rinsho. Japanese journal of clinical medicine·2009

This review examined different ways to treat fatigue in people with functional somatic syndromes, including ME/CFS. The researchers found that both psychological treatments (like cognitive behavioral therapy) and physical rehabilitation (like graded exercise therapy) appear helpful for reducing fatigue, alongside medical treatments. The study suggests that a combination of approaches—addressing both the mind and body—may be important for managing fatigue in these conditions.

E0 ConsensusReviewPEM unclearSystematic-Review

The expressed needs of people with chronic fatigue syndrome/myalgic encephalomyelitis: a systematic review.

Drachler, Maria de Lourdes, Leite, Jose Carlos de Carvalho, Hooper, Lee et al.·BMC public health·2009

This review looked at 32 studies involving over 2,500 people with ME/CFS to understand what kind of support they need most. The research found that people with ME/CFS want help understanding their illness and getting a diagnosis, respect from doctors and healthcare workers, support from family and friends, reliable information about the condition, and practical strategies to manage their symptoms and stay connected with others. The most important finding was that healthcare providers and those around patients need to truly understand ME/CFS and respond with compassion to help people rebuild their lives.

E0 ConsensusReviewPEM not requiredMeta-Analysis

As good as it gets? A meta-analysis and systematic review of methodological quality of heart rate variability studies in functional somatic disorders.

Tak, Lineke M, Riese, Harriëtte, de Bock, Geertruida H et al.·Biological psychology·2009

This research review looked at whether people with ME/CFS and similar conditions have problems with their nervous system's ability to regulate heart rate. Researchers combined results from 23 studies involving 533 patients and found weak evidence that patients may have lower parasympathetic nerve activity (the calming part of the nervous system) compared to healthy people. However, the evidence was not strong enough to draw firm conclusions, and the studies reviewed had many quality problems that made the results unreliable.

Autonomic Nervous System

← Previous Next 20 studies →

Or browse by topic

PEM Immune Neuro Metabolic Biomarkers Severe ME Long COVID Cognitive

Evidence Atlas

Evidence browser

Anxiety in children and adolescents with chronic physical illnesses: a meta-analysis.

Chronic fatigue syndrome.

Homeopathic treatments in psychiatry: a systematic review of randomized placebo-controlled studies.

Sleep, pain, fibromyalgia, and chronic fatigue syndrome.

Treating chronic fatigue syndrome - a study into the scientific evidence for pharmacological treatments.

Somatization in Latin America: a review of the classification of somatoform disorders, functional syndromes and medically unexplained symptoms.

Depressive symptoms in children and adolescents with chronic physical illness: an updated meta-analysis.

Hypothalamic-pituitary-adrenal axis dysfunction in chronic fatigue syndrome.

Mindfulness-based stress reduction for people with chronic diseases.

Clinical uses of melatonin: evaluation of human trials.

Possible detrimental effects of cognitive behaviour therapy for chronic fatigue syndrome.

Cognitive functioning in chronic fatigue syndrome: a meta-analysis.

Chronic fatigue syndrome: is there a role for non-antidepressant pharmacotherapy?

Psychiatric aspects of chronic fatigue syndrome and fibromyalgia.

The genetics and epigenetics of fatigue.

Alternative medical interventions used in the treatment and management of myalgic encephalomyelitis/chronic fatigue syndrome and fibromyalgia.

Evidence for overlap between urological and nonurological unexplained clinical conditions.

[Biomedical and psychosocial treatment of fatigue in functional somatic syndrome].

The expressed needs of people with chronic fatigue syndrome/myalgic encephalomyelitis: a systematic review.

As good as it gets? A meta-analysis and systematic review of methodological quality of heart rate variability studies in functional somatic disorders.

Curated Collections

Neuroinflammation Evidence

Metabolism & Mitochondria

Biomarkers

PEM-Specific Research