I don't think this has been posted yet. The full paper can be found at: http://www.scirp.org/journal/psych/ This is the abstract: Journal: Psychology, 2010, 1: 9-16, doi:10.4236/psych.2010.11002 Published Online April 2010 Authors:Leonard A. Jason, Meredyth Evans, Abigail Brown, Molly Brown, Nicole Porter, Jessica Hunnell, Valerie Anderson, Athena Lerch Affiliation: DePaul University, Chicago, American. Email: <Ljason@depaul.edu> Received February 10th, 2010; revised March 7th, 2010; accepted March 8th, 2010. ABSTRACT In an effort to bring more standardization to the chronic fatigue syndrome (CFS) Fukuda et al. case definition , the Centers for Disease Control and Prevention (CDC) has developed an empirical case definition  that specifies criteria and instruments to diagnose CFS. The present study investigated the sensitivity and specificity of this CFS empirical case definition with diagnosed individuals with CFS from a community based study that were compared to non-CFS cases. All participants completed questionnaires measuring disability (Medical Outcome Survey Short-Form-36) , fatigue (the Multidimensional Fatigue Inventory) , and symptoms (CDC Symptom Inventory) . Findings of the present study indicated sensitivity and specificity problems with the CDC empirical CFS case definition. The paper concludes: "The sensitivity and specificity outcomes for the Reeves et al. criteria suggest that these recommended scales and cutoff points would not be considered a good diagnostic tool for selecting CFS cases from the general population."