ME/CFS Evidence Browser — Classified Studies on Myalgic Encephalomyelitis

2795 studies

581–600 of 2,795 studies

E2 ModerateCohortPEM not requiredObservational

A Comprehensive Report of German Nationwide Inpatient Data on the Post-COVID-19 Syndrome Including Annual Direct Healthcare Costs.

Walter, Nike, Rupp, Markus, Lang, Siegmund et al.·Viruses·2022

This study looked at hospital records across Germany to understand how many people were hospitalized with Post-COVID Syndrome (PCS), what treatments they received, and how much it cost the healthcare system. Researchers found nearly 30,000 hospitalized PCS patients in one year, with common problems including pneumonia, fatigue, and breathing difficulties. The total cost to the healthcare system was over €136 million, averaging about €4,583 per patient.

E2 ModerateCohortPEM not requiredCross-Sectional

Survey of Anti-Pathogen Antibody Levels in Myalgic Encephalomyelitis/Chronic Fatigue Syndrome.

O'Neal, Adam J, Glass, Katherine A, Emig, Christopher J et al.·Proteomes·2022

Researchers tested blood samples from ME/CFS patients to look for antibodies against 122 different germs that might trigger the illness. They compared the results to healthy people of similar age, sex, and weight. While they found differences in how men and women with ME/CFS respond to infections, they couldn't identify one specific germ as the culprit.

Immune System

E2 ModerateCohortPEM requiredCross-Sectional

Separating Patients with SEID from Those with CFS in the French ME/CFS Association, with Some Thoughts on Nomenclature.

Campagne, Julien, Fornasieri, Isabelle, Andreani, Barbara et al.·Diagnostics (Basel, Switzerland)·2022

Researchers surveyed French ME/CFS patients to see how many met the newer diagnostic criteria called SEID (Systemic Exertion Intolerance Disease), proposed in 2015. They found that about 84% of patients in the survey met SEID criteria, and certain symptoms like unrefreshing sleep, brain fog, and problems with blood pressure changes were especially useful for identifying SEID patients. However, most patients didn't strongly prefer the new SEID name over ME/CFS, suggesting the medical community should work with patients to find better terminology.

Diagnostics

E2 ModerateBehavioralPEM not requiredCase-Control

Treatments of chronic fatigue syndrome and its debilitating comorbidities: a 12-year population-based study.

Leong, Kam-Hang, Yip, Hei-Tung, Kuo, Chien-Feng et al.·Journal of translational medicine·2022

This study looked at over 12,000 people in Taiwan with ME/CFS and compared them to an equal number of similar people without the condition. Researchers found that people with ME/CFS are much more likely to also have depression, anxiety, sleep problems, and certain other illnesses like diabetes and rheumatoid arthritis. The study also found that doctors commonly prescribed antidepressants, anti-anxiety medications, pain relievers, and recommended exercise and therapy—treatments that earlier research suggested might help with ME/CFS symptoms.

Interventions

E2 ModerateCohortPEM not requiredObservational

Endometriosis: A Retrospective Analysis of Clinical Data from a Cohort of 4,083 Patients, With Focus on Symptoms.

Signorile, Pietro G, Cassano, Maria, Viceconte, Rosa et al.·In vivo (Athens, Greece)·2022

This study looked at health records from over 4,000 women with endometriosis (a painful condition where tissue grows outside the uterus) to understand which symptoms are most common. The researchers found that chronic fatigue, painful intercourse, and bowel problems are major symptoms of endometriosis, and interestingly, symptoms tend to peak in women aged 25-44 years before declining. The study suggests that having children may help reduce fatigue in women with endometriosis.

E2 ModerateCohortPEM not requiredLongitudinal

Chronic fatigue syndrome and cognitive deficit are associated with acute-phase neuropsychiatric manifestations of COVID-19: A 9-month follow-up study.

Mirfazeli, Fatemeh Sadat, Sarabi-Jamab, Atiye, Pereira-Sanchez, Victor et al.·Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology·2022

This study followed 95 COVID-19 patients for 9 months to see which ones developed long-COVID symptoms like fatigue and brain fog. The most common symptom was extreme tiredness (affecting about half the patients), followed by anxiety, shortness of breath, and headaches. Interestingly, how sick someone was during acute COVID didn't predict whether they'd have long-COVID problems—but certain early warning signs (like psychiatric symptoms during the acute phase) did predict who would develop chronic fatigue and memory problems later.

Cognitive Impairment

E2 ModerateCohortPEM not requiredCross-Sectional

Association of SARS-CoV-2 Seropositivity With Myalgic Encephalomyelitis and/or Chronic Fatigue Syndrome Among Children and Adolescents in Germany.

Sorg, Anna-Lisa, Becht, Selina, Jank, Marietta et al.·JAMA network open·2022

This study looked at whether children and teenagers who had been infected with the virus that causes COVID-19 were more likely to develop ME/CFS symptoms like severe fatigue and muscle pain. Researchers tested 634 young people in Germany and found that those who had been infected with COVID-19 showed only slightly higher rates of ME/CFS symptoms compared to those who hadn't been infected. The increase was small enough that other factors—like stress from lockdowns—might explain the symptoms just as well.

E2 ModerateCohortPEM unclearCross-Sectional

Chronic Fatigue Exhibits Heterogeneous Autoimmunity Characteristics Which Reflect Etiology.

Danilenko, Olga V, Gavrilova, Natalia Y, Churilov, Leonid P·Pathophysiology : the official journal of the International Society for Pathophysiology·2022

This study found that ME/CFS patients have unusual immune system patterns—specifically, their bodies produce antibodies (immune proteins) that attack their own nervous system tissues. The researchers divided ME/CFS patients into three groups based on cause (viral infection, stress, or unknown origin) and found that different groups had different patterns of these self-attacking antibodies. Importantly, all ME/CFS patients showed elevated levels of antibodies against brain and nerve proteins, which could explain why the illness affects multiple body systems.

Immune System

E2 ModerateCohortPEM not requiredObservational

Mistaken Identity: Many Diagnoses are Frequently Misattributed to Lyme Disease.

Kobayashi, Takaaki, Higgins, Yvonne, Melia, Michael T et al.·The American journal of medicine·2022

This study looked at over 1,000 patients who were referred to a hospital thinking they had Lyme disease, but actually didn't. The doctors found that 84% of these patients did not have Lyme disease at all. Instead, they had many other conditions causing their symptoms, including anxiety, depression, fibromyalgia, and chronic fatigue syndrome. This suggests that Lyme disease is being diagnosed too often when patients actually have other medical problems.

Diagnostics

E2 ModerateBehavioralPEM not requiredLongitudinal

Generalized Worry in Patients With Chronic Fatigue Syndrome Following Cognitive Behavioral Therapy: A Prospective Cohort Study in Secondary Care.

Kalfas, Michail, Smakowski, Abigail, Hirsch, Colette et al.·Behavior therapy·2022

This study looked at worry in nearly 500 people with ME/CFS who received a talking therapy called cognitive behavioral therapy (CBT). About 7 in 10 patients had significant worry alongside their fatigue. After CBT, patients reported notably less worry, and this improvement stayed stable months later. People who worried severely at the start also experienced worse fatigue and had more difficulty with work and social activities.

E2 ModerateCohortPEM unclearCross-Sectional

Autoimmune gene expression profiling of fingerstick whole blood in Chronic Fatigue Syndrome.

Wang, Zheng, Waldman, Michelle F, Basavanhally, Tara J et al.·Journal of translational medicine·2022

Researchers tested blood samples from 166 ME/CFS patients and 83 healthy people to look for immune system clues that might explain the disease. They found that six specific genes related to immune function were more active in patients with severe, bedridden ME/CFS compared to those with milder disease. The study suggests these genes could potentially be used as biomarkers to identify how severe someone's ME/CFS is and might point toward new treatments.

BiomarkersImmune System

E2 ModerateCohortPEM requiredObservational

Factors Influencing the Prognosis of Patients with Myalgic Encephalomyelitis/Chronic Fatigue Syndrome.

Ghali, Alaa, Lacout, Carole, Fortrat, Jacques-Olivier et al.·Diagnostics (Basel, Switzerland)·2022

This study looked at 168 ME/CFS patients to understand what factors help people recover or significantly improve. The research found that only about 13% of patients experienced recovery or substantial improvement over time. Interestingly, patients who were older when they first got sick were more likely to improve, and people who received a diagnosis sooner (without long delays) also had better outcomes. The study confirms that ME/CFS is generally a serious condition with poor prognosis, but suggests that improvement is possible at any age.

Post-Exertional Malaise

E2 ModerateCohortPEM unclearCross-Sectional

Biomarkers in the diagnostic algorithm of myalgic encephalomyelitis/chronic fatigue syndrome.

Gravelsina, Sabine, Vilmane, Anda, Svirskis, Simons et al.·Frontiers in immunology·2022

This study looked for biological markers (measurable signs in the blood) that could help doctors diagnose ME/CFS more easily. Researchers tested 134 ME/CFS patients and 33 healthy people for a virus called HHV-6 and specific antibodies that attack nerve receptors. They found that ME/CFS patients had higher levels of certain antibodies compared to healthy controls, and patients with more virus in their blood tended to have more severe symptoms.

BiomarkersImmune System

E2 ModerateCohortPEM unclearCross-Sectional

Saliva antibody-fingerprint of reactivated latent viruses after mild/asymptomatic COVID-19 is unique in patients with myalgic-encephalomyelitis/chronic fatigue syndrome.

Apostolou, Eirini, Rizwan, Muhammad, Moustardas, Petros et al.·Frontiers in immunology·2022

This study found that people with ME/CFS have a different immune response to COVID-19 compared to healthy people, even when the COVID infection is mild. Specifically, the researchers discovered that after COVID-19, dormant viruses (like EBV and others) reactivate more strongly in people with ME/CFS, as shown by antibody patterns in saliva. This suggests that COVID-19 may trigger hidden virus reactivation that could contribute to fatigue symptoms in ME/CFS patients.

Immune System

E2 ModerateCohortPEM requiredObservational

Long-term neuromuscular consequences of SARS-Cov-2 and their similarities with myalgic encephalomyelitis/chronic fatigue syndrome: results of the retrospective CoLGEM study.

Retornaz, Frédérique, Rebaudet, Stanislas, Stavris, Chloé et al.·Journal of translational medicine·2022

This study found that long-COVID patients and ME/CFS patients have very similar symptoms and muscle problems. Researchers measured electrical activity in leg muscles during and after exercise in both groups and found comparable patterns of muscle fatigue. This suggests that COVID-19 infection may trigger ME/CFS-like illness in some people.

Post-Exertional Malaise

E2 ModerateCohortPEM not requiredLongitudinal

Predictors of Chronic Fatigue Syndrome and Mood Disturbance After Acute Infection.

Sandler, Carolina X, Cvejic, Erin, Valencia, Braulio M et al.·Frontiers in neurology·2022

This study followed people who had acute viral infections (EBV, Ross River virus, or Q fever) to see who developed ME/CFS-like symptoms by 6 months. About 1 in 5 participants met CFS criteria. The researchers found that people who felt more severely ill during their acute infection, and those with mood problems during that time, were more likely to have prolonged fatigue and continued mood difficulties afterward.

E2 ModerateCohortPEM unclearLongitudinal

Physiological assessment of orthostatic intolerance in chronic fatigue syndrome.

Natelson, Benjamin H, Lin, Jin-Mann S, Blate, Michelle et al.·Journal of translational medicine·2022

This study tested how the bodies of ME/CFS patients respond when they shift from lying down to leaning upright for 10 minutes. Researchers measured heart rate, blood pressure, breathing, and carbon dioxide levels in the blood. They found that 60% of patients showed abnormal responses, with low blood carbon dioxide levels being the most common problem, followed by an excessively fast heartbeat when standing.

Autonomic Nervous System

E2 ModerateCohortPEM not requiredObservational

The incidence and characteristics of chronic pain and fatigue after 12 months later admitting with COVID-19; The Post- COVID 19 syndrome.

Janbazi, Lobaneh, Kazemian, Alireza, Mansouri, Kourosh et al.·American journal of physical medicine & rehabilitation·2022

Researchers followed 157 people who were hospitalized with COVID-19 and checked on them 12 months later. They found that about 27% still had chronic fatigue and muscle weakness, and about 15% experienced chronic pain, mostly in the lower back and legs. Women were more likely than men to report these symptoms, and many patients were only using pain medications rather than receiving rehabilitation or mental health support.

Pain and Sensitization

E2 ModerateCohortPEM not requiredObservational

Combination of whole body cryotherapy with static stretching exercises reduces fatigue and improves functioning of the autonomic nervous system in Chronic Fatigue Syndrome.

Kujawski, Sławomir, Słomko, Joanna, Godlewska, Beata R et al.·Journal of translational medicine·2022

This study tested whether combining cold therapy (whole body cryotherapy) with stretching exercises could help people with ME/CFS. Over 2 weeks, 32 people with ME/CFS and 18 healthy people did 10 sessions of stretching and cold exposure. People with ME/CFS experienced less fatigue and some improvements in thinking speed after the treatment, and the cold therapy was well-tolerated with no serious safety concerns.

Autonomic Nervous System

E2 ModerateCohortPEM unclearCross-Sectional

The Relationship between Physical Activity and Long COVID: A Cross-Sectional Study.

Wright, Jack, Astill, Sarah L, Sivan, Manoj·International journal of environmental research and public health·2022

This study asked 477 people with Long COVID about their physical activity levels before and after illness, and how exercise affected their symptoms. Participants were much less active after getting Long COVID and needed more help with daily tasks. Most people (about 75%) reported that physical activity made their symptoms worse, while only about 1% said it improved them.

Post-Exertional Malaise

← Previous Next 20 studies →

Or browse by topic

PEM Immune Neuro Metabolic Biomarkers Severe ME Long COVID Cognitive

Evidence Atlas

Evidence browser

A Comprehensive Report of German Nationwide Inpatient Data on the Post-COVID-19 Syndrome Including Annual Direct Healthcare Costs.

Survey of Anti-Pathogen Antibody Levels in Myalgic Encephalomyelitis/Chronic Fatigue Syndrome.

Separating Patients with SEID from Those with CFS in the French ME/CFS Association, with Some Thoughts on Nomenclature.

Treatments of chronic fatigue syndrome and its debilitating comorbidities: a 12-year population-based study.

Endometriosis: A Retrospective Analysis of Clinical Data from a Cohort of 4,083 Patients, With Focus on Symptoms.

Chronic fatigue syndrome and cognitive deficit are associated with acute-phase neuropsychiatric manifestations of COVID-19: A 9-month follow-up study.

Association of SARS-CoV-2 Seropositivity With Myalgic Encephalomyelitis and/or Chronic Fatigue Syndrome Among Children and Adolescents in Germany.

Chronic Fatigue Exhibits Heterogeneous Autoimmunity Characteristics Which Reflect Etiology.

Mistaken Identity: Many Diagnoses are Frequently Misattributed to Lyme Disease.

Generalized Worry in Patients With Chronic Fatigue Syndrome Following Cognitive Behavioral Therapy: A Prospective Cohort Study in Secondary Care.

Autoimmune gene expression profiling of fingerstick whole blood in Chronic Fatigue Syndrome.

Factors Influencing the Prognosis of Patients with Myalgic Encephalomyelitis/Chronic Fatigue Syndrome.

Biomarkers in the diagnostic algorithm of myalgic encephalomyelitis/chronic fatigue syndrome.

Saliva antibody-fingerprint of reactivated latent viruses after mild/asymptomatic COVID-19 is unique in patients with myalgic-encephalomyelitis/chronic fatigue syndrome.

Long-term neuromuscular consequences of SARS-Cov-2 and their similarities with myalgic encephalomyelitis/chronic fatigue syndrome: results of the retrospective CoLGEM study.

Predictors of Chronic Fatigue Syndrome and Mood Disturbance After Acute Infection.

Physiological assessment of orthostatic intolerance in chronic fatigue syndrome.

The incidence and characteristics of chronic pain and fatigue after 12 months later admitting with COVID-19; The Post- COVID 19 syndrome.

Combination of whole body cryotherapy with static stretching exercises reduces fatigue and improves functioning of the autonomic nervous system in Chronic Fatigue Syndrome.

The Relationship between Physical Activity and Long COVID: A Cross-Sectional Study.

Curated Collections

Neuroinflammation Evidence

Metabolism & Mitochondria

Biomarkers

PEM-Specific Research