Terminology


 * Accuracy, accurate
 * Accuracy is the "closeness of an observation to the true clinical state" (Sackett et al., 1986).


 * Bias, biased, research bias
 * "Bias in research is "a systematic deviation of an observation from the true clinical state" (Sackett et al., 1986).


 * Bradycardia
 * slowness of the heartbeat, so that the pulse rate is less than 60 per minute in an adult.


 * CBT
 * Cognitive behavioral therapy


 * CF
 * Chronic fatigue; this persistent and abnormal is a symptom not an illness. May be caused by depression, multiple sclerosis, fibromyalgia, chronic fatigue syndrome or many other illnesses.


 * Fukuda criteria
 * The most commonly used criteria for chronic fatigue syndrome, created by the CDC.


 * GET
 * Graded Exercise Therapy, a gradual increase in exercise or activity, according to a pre-defined plan.


 * ME
 * Myalgic encephalomyelitis or M.E. has different diagnostic criteria to chronic fatigue syndrome; neurological symptoms are required but fatigue is an optional symptom. Many people with CFS do not have ME, although the World Health Organization and others use ME and CFS interchangeably.


 * NICE guidelines, NICE
 * NICE guidelines are clinical guidelines used in the UK.


 * Phase 3
 * Last phase of clinical trials before a drug can be approved for public use.


 * SEID
 * Systematic Exertion Intolerance Disease. A new term with new diagnostic criteria designed to replace chronic fatigue syndrome.


 * WHO
 * World Health Organization.