References
- Holmes GP, Kaplan JE, Gantz NM, et al. Chronic fatigue syndrome: a working case definition. Ann Intern Med. 1988;108:387–389. doi: https://doi.org/10.7326/0003-4819-108-3-387
- Fukuda K, Straus SE, Hickie I, et al. The chronic fatigue syndrome: a comprehensive approach to its definition and study. International chronic fatigue syndrome study group. Ann Intern Med. 1994;121:953–959. doi: https://doi.org/10.7326/0003-4819-121-12-199412150-00009
- SocialSecurityRuling. Evaluating claims involving chronic fatigue syndrome (CFS). Fed Regist. 2014;79:18750–18755.
- Meeus M, Ickmans K, Struyf F, et al. What is in a name? Comparing diagnostic criteria for chronic fatigue syndrome with or without fibromyalgia. Clin Rheumatol. 2016;35:191–203. doi: https://doi.org/10.1007/s10067-014-2793-x
- Vincent A, Brimmer DJ, Whipple MO, et al. Prevalence, incidence, and classification of chronic fatigue syndrome in Olmsted County, Minnesota, as estimated using the Rochester Epidemiology Project. Mayo Clin Proc. 2012;87:1145–1152. doi: https://doi.org/10.1016/j.mayocp.2012.08.015
- Bakken IJ, Tveito K, Gunnes N, et al. Two age peaks in the incidence of chronic fatigue syndrome/myalgic encephalomyelitis: a population-based registry study from Norway 2008–2012. BMC Med. 2014;12:167.
- Nacul LC, Lacerda EM, Pheby D, et al. Prevalence of myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) in three regions of England: a repeated cross-sectional study in primary care. BMC Med. 2011;9:91. doi: https://doi.org/10.1186/1741-7015-9-91
- Gray ML, Fossey EM. Illness experience and occupations of people with chronic fatigue syndrome. Aust Occup Ther J. 2003;50:127–136. doi: https://doi.org/10.1046/j.1440-1630.2003.00336.x
- Miller A, Dishon S. Health-related quality of life in multiple sclerosis: the impact of disability, gender and employment status. Qual Life Res. 2006;15:259–271. doi: https://doi.org/10.1007/s11136-005-0891-6
- Ross SD, Estok RP, Frame D, et al. Disability and chronic fatigue syndrome: a focus on function. Arch Intern Med. 2004;164:1098–1107. doi: https://doi.org/10.1001/archinte.164.10.1098
- Nyland M, Naess H, Birkeland JS, et al. Longitudinal follow-up of employment status in patients with chronic fatigue syndrome after mononucleosis. BMJ Open. 2014;4:e005798. doi: https://doi.org/10.1136/bmjopen-2014-005798
- Jain V, Arunkumar A, Kingdon C, et al. Prevalence of and risk factors for severe cognitive and sleep symptoms in ME/CFS and MS. BMC Neurol. 2017;17:117. doi: https://doi.org/10.1186/s12883-017-0896-0
- Komaroff AL, Fagioli LR, Doolittle TH, et al. Health status in patients with chronic fatigue syndrome and in general population and disease comparison groups. Am J Med. 1996;101:281–290. doi: https://doi.org/10.1016/S0002-9343(96)00174-X
- Taillefer SS, Kirmayer LJ, Robbins JM, et al. Psychological correlates of functional status in chronic fatigue syndrome. J Psychosom Res. 2002;53:1097–1106. doi: https://doi.org/10.1016/S0022-3999(02)00566-4
- Jason L, Brown M, Evans M, et al. Measuring substantial reductions in functioning in patients with chronic fatigue syndrome. Disabil Rehabil. 2011;33:589–598. doi: https://doi.org/10.3109/09638288.2010.503256
- Jason LA, Ohanian D, Brown A, et al. Differentiating multiple sclerosis from myalgic encephalomyelitis and chronic fatigue syndrome. Insights Biomed. 2017;2(2). doi:https://doi.org/10.21767/2572-5610.10027
- Kingdon CC, Bowman EW, Curran H, et al. Functional status and well-being in people with myalgic encephalomyelitis/chronic fatigue syndrome compared with people with multiple sclerosis and healthy controls. Pharmacoecon Open. 2018;2:381–392. doi: https://doi.org/10.1007/s41669-018-0071-6
- Raggi A, Covelli V, Schiavolin S, et al. Work-related problems in multiple sclerosis: a literature review on its associates and determinants. Disabil Rehabil. 2016;38:936–944. doi: https://doi.org/10.3109/09638288.2015.1070295
- Visschedijk MA, Uitdehaag BM, Klein M, et al. Value of health-related quality of life to predict disability course in multiple sclerosis. Neurology. 2004;63:2046–2050. doi: https://doi.org/10.1212/01.WNL.0000145769.51420.ED
- Naess H, Nyland M, Hausken T, et al. Chronic fatigue syndrome after Giardia enteritis: clinical characteristics, disability and long-term sickness absence. BMC Gastroenterol. 2012;12:13. Available from http://www.biomedcentral.com/1471-230X/12/13 doi: https://doi.org/10.1186/1471-230X-12-13
- McDonald WI, Compston A, Edan G, et al. Recommended diagnostic criteria for multiple sclerosis: guidelines from the international panel on the diagnosis of multiple sclerosis. Ann Neurol. 2001;50:121–127. doi: https://doi.org/10.1002/ana.1032
- Grytten N, Glad SB, Aarseth JH, et al. A 50-year follow-up of the incidence of multiple sclerosis in Hordaland County, Norway. Neurology. 2006;66:182–186. doi: https://doi.org/10.1212/01.wnl.0000195549.95448.b9
- Lode K, Bru E, Klevan G, et al. Depressive symptoms and coping in newly diagnosed patients with multiple sclerosis. Mult Scler. 2009;15:638–643. doi: https://doi.org/10.1177/1352458509102313
- Pepper CM, Krupp LB, Friedberg F, et al. A comparison of neuropsychiatric characteristics in chronic fatigue syndrome, multiple sclerosis, and major depression. J Neuropsychiatry Clin Neurosci. 1993;5:200–205. doi: https://doi.org/10.1176/jnp.5.2.200
- Ware NC, Kleinman A. Culture and somatic experience: the social course of illness in neurasthenia and chronic fatigue syndrome. Psychosom Med. 1992;54:546–560. doi: https://doi.org/10.1097/00006842-199209000-00003
- McHorney CA, Ware JE, Jr., Raczek AE. The MOS 36-item Short-Form Health Survey (SF-36): II. Psychometric and clinical tests of validity in measuring physical and mental health constructs. Med Care 1993;31:247–263. doi: https://doi.org/10.1097/00005650-199303000-00006
- Gronwall DM. Paced auditory serial-addition task: a measure of recovery from concussion. Percept Mot Skills. 1977;44:367–373. doi: https://doi.org/10.2466/pms.1977.44.2.367
- Smith A. Symbol digit modalities test: manual. California: Western Psychological Services; 1982.
- Buschke H. Selective reminding for analysis of memory and learning. J Verbal Learning Verbal Behav. 1973;12:543–550. doi: https://doi.org/10.1016/S0022-5371(73)80034-9
- Zigmond AS, Snaith RP. The Hospital Anxiety and Depression Scale. Acta Psychiatr Scand. 1983;67:361–370. doi: https://doi.org/10.1111/j.1600-0447.1983.tb09716.x
- Bjelland I, Dahl AA, Haug TT, et al. The validity of the Hospital Anxiety and Depression Scale. An updated literature review. J Psychosom Res. 2002;52:69–77. doi: https://doi.org/10.1016/S0022-3999(01)00296-3
- Schweitzer R, Kelly B, Foran A, et al. Quality of life in chronic fatigue syndrome. Soc Sci Med. 1995;41:1367–1372. doi: https://doi.org/10.1016/0277-9536(95)00124-P
- Pittion-Vouyovitch S, Debouverie M, Guillemin F, et al. Fatigue in multiple sclerosis is related to disability, depression and quality of life. J Neurol Sci. 2006;243:39–45. doi: https://doi.org/10.1016/j.jns.2005.11.025
- Lowry TJ, Pakenham KI. Health-related quality of life in chronic fatigue syndrome: predictors of physical functioning and psychological distress. Psychol Health Med. 2008;13:222–238. doi: https://doi.org/10.1080/13548500701335698
- Filippi M, Rocca MA, Colombo B, et al. Functional magnetic resonance imaging correlates of fatigue in multiple sclerosis. Neuroimage. 2002;15:559–567. doi: https://doi.org/10.1006/nimg.2001.1011
- Boissoneault J, Letzen J, Lai S, et al. Abnormal resting state functional connectivity in patients with chronic fatigue syndrome: an arterial spin-labeling fMRI study. Magn Reson Imaging. 2016;34:603–608. doi: https://doi.org/10.1016/j.mri.2015.12.008
- Vercoulen JH, Bazelmans E, Swanink CM, et al. Physical activity in chronic fatigue syndrome: assessment and its role in fatigue. J Psychiatr Res. 1997;31:661–673. doi: https://doi.org/10.1016/S0022-3956(97)00039-3
- Lehman AM, Lehman DR, Hemphill KJ, et al. Illness experience, depression, and anxiety in chronic fatigue syndrome. J Psychosom Res. 2002;52:461–465. doi: https://doi.org/10.1016/S0022-3999(02)00318-5
- Naess H, Sundal E, Myhr KM, et al. Postinfectious and chronic fatigue syndromes: clinical experience from a tertiary-referral centre in Norway. In Vivo. 2010;24:185–188.
- Owe JF, Naess H, Gjerde IO, et al. Investigation of suspected chronic fatigue syndrome/myalgic encephalopathy. Tidsskr Nor Laegeforen. 2016;136:227–232. doi: https://doi.org/10.4045/tidsskr.15.0229
- Cockshell SJ, Mathias JL. Cognitive functioning in chronic fatigue syndrome: a meta-analysis. Psychol Med. 2010;40:1253–1267. doi: https://doi.org/10.1017/S0033291709992054
- Cockshell SJ, Mathias JL. Cognitive deficits in chronic fatigue syndrome and their relationship to psychological status, symptomatology, and everyday functioning. Neuropsychology. 2013;27:230–242. doi: https://doi.org/10.1037/a0032084
- Pompeii LA, Moon SD, McCrory DC. Measures of physical and cognitive function and work status among individuals with multiple sclerosis: a review of the literature. J Occup Rehabil. 2005;15:69–84. doi: https://doi.org/10.1007/s10926-005-0875-y
- Strober LB, Christodoulou C, Benedict RH, et al. Unemployment in multiple sclerosis: the contribution of personality and disease. Mult Scler. 2012;18:647–653. doi: https://doi.org/10.1177/1352458511426735
- Flensner G, Landtblom AM, Soderhamn O, et al. Work capacity and health-related quality of life among individuals with multiple sclerosis reduced by fatigue: a cross-sectional study. BMC Public Health. 2013;13:224. doi: https://doi.org/10.1186/1471-2458-13-224
- Krause I, Kern S, Horntrich A, et al. Employment status in multiple sclerosis: impact of disease-specific and non-disease-specific factors. Mult Scler. 2013;19:1792–1799. doi: https://doi.org/10.1177/1352458513485655
- Collin SM, Crawley E, May MT, et al. The impact of CFS/ME on employment and productivity in the UK: a cross-sectional study based on the CFS/ME national outcomes database. BMC Health Serv Res. 2011;11:217. doi: https://doi.org/10.1186/1472-6963-11-217