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These definitions provide standards that may improve future comparisons of low back pain prevalence figures by person, place and time characteristics, and offer opportunities for statistical summaries.

Objective. To determine whether abnormalities of peripheral and central nociceptive sensory input processing exist outside areas of spontaneous pain in patients with fibromyalgia (FM) as compared with controls, by using quantitative sensory testing (QST) and a neurophysiologic paradigm independent from subjective reports.Methods. A total of 164 outpatients with FM who were attending a self-management program were invited to participate in the study. Data for 85 patients were available and were compared with those for 40 non-FM controls matched for age and sex. QST was performed using thermal, mechanical, and electrical stimuli at locations of nonspontaneous pain. Pain assessment was 2-fold and included use of subjective scales and the spinal nociceptive flexion reflex (NFR), a specific physiologic correlate for the objective evaluation of central nociceptive pathways. Questionnaires regarding quality of life and the impact of FM were available.Results. Participants were mainly middle-aged women, with a mean disease duration of 8 years. Between-group differences were significant for neurophysiologic, clinical, and quality of life measures. In patients with FM, peripheral QST showed significantly altered cold and heat pain thresholds, and tolerance to cold pain was radically reduced.

Objective: To evaluate the efficacy of a treatment programme for patients with fibromyalgia (FM) based on self management, using pool exercises and education. Methods: Randomised controlled trial with a 6 month follow up to evaluate an outpatient multidisciplinary programme; 164 patients with FM were allocated to an immediate 6 week programme (n = 84) or to a waiting list control group (n = 80). The main outcomes were changes in quality of life, functional consequences, patient satisfaction and pain, using a combination of patient questionnaires and clinical examinations. The questionnaires included the Fibromyalgia Impact Questionnaire (FIQ), Psychological General Well-Being (PGWB) index, regional pain score diagrams, and patient satisfaction measures. Results: 61 participants in the treatment group and 68 controls completed the programme and 6 month follow up examinations. Six months after programme completion, significant improvements in quality of life and functional consequences of FM were seen in the treatment group as compared with the controls and as measured by scores on both the FIQ (total score p = 0.025; fatigue p = 0.003; depression p = 0.031) and PGWB (total score p = 0.032; anxiety p = 0.011; vitality p = 0.013,). All four major areas of patient satisfaction showed greater improvement in the treatment than the control groups; between-group differences were statistically significant for ''control of symptoms'', ''psychosocial factors'', and ''physical therapy'' No change in pain was seen. Conclusion: A 6 week self management based programme of pool exercises and education can improve the quality of life of patients with FM and their satisfaction with treatment. These improvements are sustained for at least 6 months after programme completion.