Research studies of Leonard Jason

A listing of research studies on ME/CFS by Dr. Leonard Jason in the topic of ME/CFS.

Studies prior to 2000

 * 1993, Prevalence of Chronic Fatigue Syndrome-Related Symptoms among Nurses - (Abstract)
 * 1995, Estimating rates of chronic fatigue syndrome from a community-based sample: a pilot study - (Abstract)
 * 1997, Research with Children and Adolescents with Chronic Fatigue Syndrome: Methodologies, Designs, and Special Considerations - (Abstract)
 * 1997, A Screening Instrument for Chronic Fatigue Syndrome: Reliability and Validity - (Abstract)
 * 1997, Politics, science, and the emergence of a new disease: The case of chronic fatigue syndrome - (Abstract)
 * 1998, Understanding chronic fatigue syndrome: An empirical guide to assessment and treatment - (Abstract)
 * 1998, Estimating the prevalence of chronic fatigue syndrome among nurses - (Abstract)
 * 1998, Capturing the different phases of the CFS illness
 * 1999, A Community-Based Study of Chronic Fatigue Syndrome
 * 1999, An investigation of the different phases of the CFS illness - (Abstract)
 * 1999, U.S. Case Definition of Chronic Fatigue Syndrome: Diagnostic and Theoretical Issues (Abstract)
 * 1999, Chronic fatigue syndrome: assessing symptoms and activity level

2000

 * 2000, Chronic fatigue syndrome: sociodemographic subtypes in a community-based sample - (Abstract)
 * 2000, Chronic fatigue syndrome: occupation, medical utilization, and subtypes in a community-based sample -(Abstract)
 * 2000, Defining Chronic Fatigue Syndrome: Methodological Challenges - (Abstract)
 * 2000, Prevalence of Fatigue and Chronic Fatigue Syndrome-Like Illness in Children and Adolescents - (Full Text)
 * 2000, An empirical verification of the Fennell phases of the CFS illness - (Abstract)
 * 2000, Chronic fatigue syndrome: An examination of the phases - (Abstract)

2001

 * 2001, Attitudes Regarding Chronic Fatigue Syndrome: The Importance of a Name - (Abstract)
 * 2001, Measuring Attributions About Chronic Fatigue Syndrome - (Abstract)
 * 2001, Assessing attitudes toward new names for chronic fatigue syndrome - (Abstract)
 * 2001, Subtypes of Chronic Fatigue Syndrome: A Review of Findings - (Abstract)

2002

 * 2002, A factor analysis of chronic fatigue symptoms in a community-based sample - (Abstract)
 * 2002, Chronic fatigue, abuse-related traumatization, and psychiatric disorders in a community-based sample. - (Abstract)

2003

 * 2003, Identification of ambiguities in the 1994 chronic fatigue syndrome research case definition and recommendations for resolution - (Full Text)

2004

 * 2004, Family Medical History of Persons with Chronic Fatigue Syndrome - (Abstract)
 * 2004, Comparing the Fukuda et al. Criteria and the Canadian Case Definition for Chronic Fatigue Syndrome - (Full Text)
 * 2004, Stigma and chronic fatigue syndrome: Surveying a name change - (Abstract, full text downloadable)

2005

 * 2005, Chronic Fatigue Syndrome: The Need for Subtypes - (Abstract)
 * 2005, A population-based study of chronic fatigue syndrome (CFS) experienced in differing patient groups: An effort to replicate Vercoulen et al.'s model of CFS - (Full text)

2006

 * 2006, Psychosocial and Physical Impact of Chronic Fatigue in a Community-Based Sample of Children and Adolescents - (Abstract)


 * 2006, Reliability of a Chronic Fatigue Syndrome Questionnaire - (Abstract)


 * 2006, Causes of death among patients with chronic fatigue syndrome - (Full Text)


 * 2006, Differential Diagnosis of Chronic Fatigue Syndrome and Major Depressive Disorder - (Full Text)


 * 2006, Prevalence of Pediatric Chronic Fatigue Syndrome in a Community-Based Sample - (Abstract)

2007

 * 2007, Functioning in individuals with chronic fatigue syndrome: increased impairment with co-occurring multiple chemical sensitivity and fibromyalgia - (Full Text)


 * 2007, The Effectiveness of Early Educational Intervention in Improving Future Physicians' Attitudes Regarding CFS/FM - (Full Text)


 * 2007, Baseline Cortisol Levels Predict Treatment Outcomes in Chronic Fatigue Syndrome Nonpharmacologic Clinical Trial


 * 2007, How Science Can Stigmatize: The Case of Chronic Fatigue Syndrome - (Abstract)


 * 2007, The prevalence of chronic fatigue syndrome in Nigeria - (Abstract)


 * 2007, Non-pharmacologic interventions for CFS: a randomized trial - (Abstract)


 * 2007, Fatigue: case definition and guidelines for collection, analysis, and presentation of immunization safety data - (Preview)

2008

 * 2008, Evidence for T-helper 2 shift and association with illness parameters in chronic fatigue syndrome (CFS) - (Full Text)
 * 2008, The economic impact of ME/CFS: individual and societal costs - (Full text)
 * 2008, The associations between basal salivary cortisol levels and illness symptomatology in chronic fatigue syndrome - (Full text)
 * 2008, The Energy Envelope Theory and myalgic encephalomyelitis/chronic fatigue syndrome (Full text)

2009

 * 2009, Activity Logs as a Measure of Daily Activity Among Patients with Chronic Fatigue Syndrome - (Full text)
 * 2009, The impact of energy modulation on physical functioning and fatigue severity among patients with ME/CFS - (Full text)
 * 2009, Examining Types of Fatigue Among Individuals with ME/CFS - (Full text) (ME/CFS Fatigue Types Questionnaire - WORD) (Science for ME login necessary to view questionnaire.)
 * 2009, ME/CFS Health Outcomes: The Interaction of Mode of Illness Onset and Psychiatric Comorbidity - (Full text)
 * 2009, The relationship of Fennell phases to symptoms among patients with chronic fatigue syndrome - - (Abstract with full text available upon request)
 * 2009, Severe versus Moderate criteria for the new pediatric case definition for ME/CFS - (Abstract)
 * 2009, Kindling and oxidative stress as contributors to Myalgic Encephalomyelitis/Chronic Fatigue Syndrome - (Full Text)
 * 2009, Evaluating the Centers for Disease Control's Empirical Chronic Fatigue Syndrome Case Definition - (Full Text)
 * 2009, CFS: A Review of Epidemiology and Natural History Studies - (Full Text)

2010

 * 2010, Possible Genetic Dysregulation in Pediatric CFS - (Full Text)
 * 2010, Classification of Myalgic encephalomyelitis/Chronic Fatigue Syndrome by Types of Fatigue - (Full Text) (ME/CFS Fatigue Types Questionnaire - WORD) (Science for ME login necessary to view questionnaire.)
 * 2010, A Comparison of Immune Functionality in Viral versus Non-Viral CFS Subtypes - (Full Text)
 * 2010, What is fatigue? Pathological and nonpathological fatigue " - (Abstract)
 * 2010, Illness duration and coping style in chronic fatigue syndrome - (Full Text)
 * 2010, Alternative medical interventions used in the treatment and management of myalgic encephalomyelitis/chronic fatigue syndrome and fibromyalgia - (Abstract)
 * 2010, Provision of Social Support to Individuals With Chronic Fatigue Syndrome - (Full Text)

2011

 * 2011, The Effect of Homework Compliance on Treatment Outcomes for Participants with Myalgic Encephalomyelitis/Chronic Fatigue Syndrome - (Full Text)
 * 2011, CFS Prevalence and Risk Factors Over Time - (Full Text)
 * 2011, The Role of Changes in Activity as a Function of Perceived Available and Expended Energy in Non-Pharmacological Treatment Outcomes for ME/CFS - (Full Text)
 * 2011, An Etiological Model for Myalgic Encephalomyelitis/Chronic Fatigue Syndrome - (Full Text)
 * 2011, A natural history study of chronic fatigue syndrome - (Full Text)
 * 2011, Fatigue Scales and Chronic Fatigue Syndrome: Issues of Sensitivity and Specificity - (Full Text)

2012

 * 2012, Small Wins Matter in Advocacy Movements: Giving Voice to Patients - (Abstract)
 * 2012, Data Mining: Comparing the Empiric CFS to the Canadian ME/CFS Case Definition - (Full Text)
 * 2012, Understanding long-term outcomes of chronic fatigue syndrome - (Full Text)
 * 2012, Factor analysis of the Beck Depression Inventory-II with patients with chronic fatigue syndrome - (Full Text)
 * 2012, Antibody to Epstein-Barr Virus Deoxyuridine Triphosphate Nucleotidohydrolase and Deoxyribonucleotide Polymerase in a Chronic Fatigue Syndrome Subset - (Full Text)
 * 2012, Minimum data elements for research reports on CFS - (Full text)
 * 2012, Pacing as a strategy to improve energy management in myalgic encephalomyelitis/chronic fatigue syndrome: a consensus document - (Full text - downloadable pdf)
 * 2012, Contrasting case definitions for chronic fatigue syndrome, Myalgic Encephalomyelitis/chronic fatigue syndrome and myalgic encephalomyelitis - (Full text)
 * 2012, The Production of Interleukin-8 Is Increased in Plasma and Peripheral Blood Mononuclear Cells of Patients with Fatigue - (Full Text)
 * 2012, Predictors of Fatigue among Patients with Chronic Fatigue Syndrome - (Full text)

2013

 * 2013, Chronic fatigue syndrome following infections in adolescents - (Abstract)
 * 2013, Energy conservation/envelope theory interventions - (Full Text)
 * 2013, The implications of sensitization and kindling for chronic fatigue syndrome - (Abstract with full text available upon request)
 * 2013, Contrasting case definitions for chronic fatigue syndrome, Myalgic Encephalomyelitis/chronic fatigue syndrome and myalgic encephalomyelitis - (Abstract)

2014

 * 2014, Brain Derived Neurotrophic Factor is Decreased in Chronic Fatigue Syndrome and Multiple Sclerosis - (Full Text)
 * 2014, Validating a measure of myalgic encephalomyelitis/chronic fatigue syndrome symptomatology - (Abstract)
 * 2014, Chronic Fatigue Syndrome: The Current Status and Future Potentials of Emerging Biomarkers - (Full Text)
 * 2014, Predictors of post-infectious chronic fatigue syndrome in adolescents - (Abstract)
 * 2014, Examining case definition criteria for chronic fatigue syndrome and myalgic encephalomyelitis - (Abstract)
 * 2014, Chronic Fatigue Syndrome: Case Definitions and Diagnostic Assessment - (Full Text)
 * 2014, Vision-related symptoms as a clinical feature of chronic fatigue syndrome/myalgic encephalomyelitis? Evidence from the DePaul Symptom Questionnaire - (Abstract)

2015

 * 2015, Issues in Estimating Rates of Pediatric Chronic Fatigue Syndrome and Myalgic Encephalomyelitis in a Community-based Sample - (Full Text)
 * 2015, Novel Associations of F2-Isoprostanes, F3- Isoprostanes and Isofurans in Older Adults with Chronic Fatigue Syndrome: An Exploratory Study - (Full Text)
 * 2015, Defining Essential Features of Myalgic Encephalomyelitis and Chronic Fatigue Syndrome - (Abstract)
 * 2015, Reflections on the Institute of Medicine’s systemic exertion intolerance disease - (Full Text)
 * 2015, Examining the Institute of Medicine's Recommendations Regarding Chronic Fatigue Syndrome: Clinical Versus Research Criteria - (Full Text)
 * 2015, Caring for people with severe myalgic encephalomyelitis: An interpretative phenomenological analysis of parents’ experiences - (Abstract)
 * 2015, Myalgic Encephalomyelitis: Symptoms and Biomarkers - (Full Text)
 * 2015, Functional level of patients with chronic fatigue syndrome reporting use of alternative vs. traditional treatments - (Abstract)
 * 2015, Unintended Consequences of not Specifying Exclusionary Illnesses for Systemic Exertion Intolerance Disease - (Full Text)
 * 2015, Chronic fatigue syndrome versus systemic exertion intolerance disease - (Abstract)
 * 2015, Variability in symptoms complicates utility of case definitions. - (Full Text)
 * 2015, Comparing and contrasting consensus versus empirical domains. - (Abstract)
 * 2015, Factor Analysis of the DePaul Symptom Questionnaire: Identifying Core Domains - (Full Text)
 * 2015, Test–retest reliability of the DePaul Symptom Questionnaire - (Abstract)
 * 2015, Chronic fatigue syndrome and myalgic encephalomyelitis: towards an empirical case definition - (Full Text)
 * 2015, Problems in Defining Post-Exertional Malaise - (Full Text)
 * 2015, An assessment of fatigue in patients with postural orthostatic tachycardia syndrome (reprinted in 2017) - (Abstract)

2016

 * 2016, Patient perceptions regarding possible changes to the name and criteria for Chronic Fatigue Syndrome and Myalgic Encephalomyelitis - (Full Text)
 * 2016, Comparing the DePaul Symptom Questionnaire with physician assessments: a preliminary study - (Abstract - full text upon request)
 * 2016, Housebound versus nonhousebound patients with myalgic encephalomyelitis and chronic fatigue syndrome - (Full Text)
 * 2016, Estimating the disease burden of ME/CFS in the United States and its relation to research funding - (Full Text)
 * 2016, Identifying Key Symptoms Differentiating Myalgic Encephalomyelitis and Chronic Fatigue Syndrome from Multiple Sclerosis - (Full Text)
 * 2016, Mortality in patients with myalgic encephalomyelitis and chronic fatigue syndrome - (Full Text)
 * 2016, Deconstructing post-exertional malaise: An exploratory factor analysis - (Full Text)
 * 2016, Assessing current functioning as a measure of significant reduction in activity level - (Full Text)
 * 2016, The Role of Infectious and Stress-related Onsets in Myalgic Encephalomyelitis and Chronic Fatigue Syndrome Symptomatology and Functioning - (Full Text)
 * 2016, Educational Priorities for Healthcare Providers and Name Suggestions for Chronic Fatigue Syndrome: Including the Patient Voice - (Full Text)
 * 2016, Case definitions integrating empiric and consensus perspectives - (Full Text)
 * 2016, Comparing the DePaul Symptom Questionnaire with physician assessments: a preliminary study - (Abstract - full text upon request)
 * 2016, Housebound versus nonhousebound patients with myalgic encephalomyelitis and chronic fatigue syndrome - (Full Text)
 * 2016, The Relationship between Age and Illness Duration in Chronic Fatigue Syndrome - (Full Text)
 * 2016, Are Myalgic Encephalomyelitis and chronic fatigue syndrome different illnesses? A preliminary analysis - (Full Text)
 * 2016, Incidence of Infectious Mononucleosis in Universities and U.S. Military Settings - (Full Text)
 * 2016, The Use of Operant Methods to Evaluate Interventions for Patients With Myalgic Encephalomyelitis - (Full Text)
 * 2016, Educational Priorities for Healthcare Providers and Name Suggestions for Chronic Fatigue Syndrome: Including the Patient Voice - (Full Text)
 * 2016, Intrinsic Functional Hypoconnectivity in Core Neurocognitive Networks Suggests Central Nervous System Pathology in Patients with Myalgic Encephalomyelitis: A Pilot Study - (Abstract)
 * 2016, qEEG / LORETA in Assessment of Neurocognitive Impairment in a Patient with Chronic Fatigue Syndrome: A Case Report - (Full text)
 * 2016, Functional Neural Network Connectivity in Myalgic Encephalomyelitis - (Abstract)

2017

 * 2017, Are current chronic fatigue syndrome criteria diagnosing different disease phenotypes? - (Full Text)
 * 2017, Differentiating Multiple Sclerosis from Myalgic Encephalomyelitis and Chronic Fatigue Syndrome - (Full Text)
 * 2017, A Comparison of Case Definitions for Myalgic Encephalomyelitis and Chronic Fatigue Syndrome - (Full Text)
 * 2017, Subtyping Patients with Myalgic Encephalomyelitis (ME) and Chronic Fatigue Syndrome (CFS) By Course of Illness - (Abstract) (Free access to full text on June 26, 2018)
 * 2017, Dysregulation of cytokine pathways in chronic fatigue syndrome and multiple sclerosis - (Abstract) (Corrigendum)
 * 2017, Factors impacting the illness trajectory of post-infectious fatigue syndrome: a qualitative study of adults’ experiences - (Full Text)
 * 2017, From good health to illness with post-infectious fatigue syndrome: a qualitative study of adults’ experiences of the illness trajectory - (Full Text)
 * 2017, Clinical criteria versus a possible research case definition in chronic fatigue syndrome/myalgic encephalomyelitis - (Full Text)
 * 2017, Article - "The PACE trial missteps on pacing and patient selection" - (Full Text)
 * 2017, A Prospective Study of Infectious Mononucleosis in College Students - (Full Text)
 * 2017, Examining those Meeting IOM Criteria Versus IOM Plus Fibromyalgia - (Full Text)
 * 2017, Research Volunteers' Attitudes Toward Chronic Fatigue Syndrome and Myalgic Encephalomyelitis - (Full Text)
 * 2017, Approaching recovery from myalgic encephalomyelitis and chronic fatigue syndrome: Challenges to consider in research and practice - (Abstract)
 * 2017, Defining and measuring recovery from myalgic encephalomyelitis and chronic fatigue syndrome: the physician perspective - (Abstract)
 * 2017, Energy envelope maintenance among patients with myalgic encephalomyelitis and chronic fatigue syndrome: Implications of limited energy reserves - (Abstract)
 * 2017, Access to Medical Care for Individuals with Myalgic Encephalomyelitis and Chronic Fatigue Syndrome: A Call for Centers of Excellence. - (Full Text)
 * 2017, Differences in ME and CFS Symptomology in Patients with Normal and Abnormal Exercise Test Results - (Full Text)
 * 2017, Post-Exertional Malaise in Patients with ME and CFS with Comorbid Fibromyalgia - (Full Text)
 * 2017, Small-world network analysis of cortical connectivity in Chronic Fatigue Syndrome using quantitative EEG. - (Full Text)
 * 2017, The implications of using a broad versus narrow set of criteria in research. - (Full Text)

2018

 * 2018, Operationalizing Substantial Reduction in Functioning Among Young Adults with Chronic Fatigue Syndrome - (Abstract)
 * 2018 - Cortical hypoactivation during resting EEG suggests central nervous system pathology in patients with chronic fatigue syndrome - (Abstract)
 * 2018, Effects of unsupportive social interactions, stigma, and symptoms on patients with myalgic encephalomyelitis and chronic fatigue syndrome - (Abstract)
 * 2018, A reexamination of the cognitive behavioral model of chronic fatigue syndrome - (Abstract)
 * 2018, A content analysis of chronic fatigue syndrome and myalgic encephalomyelitis in the news from 1987 to 2013 - (Abstract)
 * 2018, Patient perceptions of post exertional malaise - (Abstract with full text upon request)
 * 2018, Meta-analysis investigating post-exertional malaise between patients and controls - (Abstract)
 * 2018, Suicidal ideation in non-depressed individuals: The effects of a chronic, misunderstood illness - (Abstract)
 * 2018, Latent class analysis of a heterogeneous international sample of patients with myalgic encephalomyelitis/chronic fatigue syndrome - (Abstract)
 * 2018, Identifying subtypes of ME and CFS: a rebuttal
 * 2018, Parent-Child Discrepancies in Children with Chronic Fatigue Syndrome-Like Symptomatology - (Full Text)
 * 2018, Onset patterns of chronic fatigue syndrome and myalgic encephalomyelitis - (Full text)
 * 2018, Commentary - The importance of a research case definition - (Abstract)
 * 2018, Defining the prevalence and symptom burden of those with self-reported severe chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME): a two-phase community pilot study in the North East of England - (Full Text)
 * 2018, A Brief Questionnaire to Assess Post-Exertional Malaise - (Full Text)
 * 2018, Confirmatory factor analysis of a myalgic encephalomyelitis and chronic fatigue syndrome stigma scale - (Abstract)
 * 2018, Meta-analysis investigating post-exertional malaise between patients and controls - (Abstract)
 * 2018, The Development of the DePaul Symptom Questionnaire: Original, Expanded, Brief and Pediatric Versions
 * 2018, The development of an instrument to assess post-exertional malaise in patients with myalgic encephalomyelitis and chronic fatigue syndrome - (Abstract)
 * 2018, Patients’ hopes for recovery from myalgic encephalomyelitis (ME) and chronic fatigue syndrome (CFS): Toward a ‘recovery in’ framework. Chronic Illness - (Abstract)

2019

 * 2019, The 'Cognitive Behavioural Model' of Chronic Fatigue Syndrome: Critique of a Flawed Model - (Abstract)
 * 2019, Myalgic encephalomyelitis and chronic fatigue syndrome case definitions: effects of requiring a substantial reduction in functioning - (Abstract)
 * 2019, Associations between autonomic and orthostatic self-report and physician ratings of orthostatic intolerance in youth - (Abstract)
 * 2019, The development of a short form of the DePaul Symptom Questionnaire (Abstract)
 * 2019, Assessment of Post-Exertional Malaise (PEM) in Patients with Myalgic Encephalomyelitis (ME) and Chronic Fatigue Syndrome (CFS): A patient-driven survey - (Full text)
 * 2019, Dismissing chronic illness: A qualitative analysis of negative health care experiences - (Abstract)
 * 2019, The DePaul Symptom Questionnaire-2: a validation study - (Abstract)
 * 2019, Differentiating post-polio syndrome from myalgic encephalomyelitis and chronic fatigue syndrome - (Abstract)

2020

 * 2020, Risk factors for suicide in chronic fatigue syndrome - (Abstract)
 * 2020, Post-viral fatigue and COVID-19: lessons from past epidemics - (Full text)