The Clinical journal of pain
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Comparative Study
Quantitative sensory testing profiles in chronic back pain are distinct from those in fibromyalgia.
Alterations in the central nervous system leading to higher pain sensitivity have been shown in both chronic back pain (CBP) and fibromyalgia syndrome (FMS). The aim of this study was to disclose commonalities and differences in the pathophysiology of FMS and CBP. ⋯ FMS patients showed increased sensitivity for different pain modalities at all measured body areas, suggesting central disinhibition as a potential mechanism. CBP participants in contrast, showed localized alterations within the affected segment possibly due to peripheral sensitization.
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Randomized Controlled Trial
A randomized, controlled study to investigate the analgesic efficacy of single doses of the cannabinoid receptor-2 agonist GW842166, ibuprofen or placebo in patients with acute pain following third molar tooth extraction.
To evaluate the postoperative analgesic efficacy of GW842166, a noncannabinoid CB2 agonist, in patients undergoing third molar tooth extraction. ⋯ In comparison to ibuprofen, single doses of GW842166 (100 and 800 mg) failed to demonstrate clinically meaningful analgesia in the setting of acute dental pain.
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Randomized Controlled Trial Comparative Study
A comparative study of 2 manual-based self-help interventions, acceptance and commitment therapy and applied relaxation, for persons with chronic pain.
The aim of this study was to compare 2 self-help-based interventions; a coping-oriented approach, applied relaxation (AR) and an acceptance-oriented approach, acceptance and commitment therapy (ACT), for persons with chronic pain. ⋯ A manual-based self-help intervention with weekly therapist support in an ACT format adds value to the treatment repertoire for persons suffering with chronic pain.
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Multicenter Study
The Discriminative validity of "nociceptive," "peripheral neuropathic," and "central sensitization" as mechanisms-based classifications of musculoskeletal pain.
Empirical evidence of discriminative validity is required to justify the use of mechanisms-based classifications of musculoskeletal pain in clinical practice. The purpose of this study was to evaluate the discriminative validity of mechanisms-based classifications of pain by identifying discriminatory clusters of clinical criteria predictive of "nociceptive," "peripheral neuropathic," and "central sensitization" pain in patients with low back (± leg) pain disorders. ⋯ By identifying a discriminatory cluster of symptoms and signs predictive of "nociceptive," "peripheral neuropathic," and "central" pain, this study provides some preliminary discriminative validity evidence for mechanisms-based classifications of musculoskeletal pain. Classification system validation requires the accumulation of validity evidence before their use in clinical practice can be recommended. Further studies are required to evaluate the construct and criterion validity of mechanisms-based classifications of musculoskeletal pain.
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Analgesic use is common but remains poorly described among human immunodeficiency virus (HIV)-infected persons in the highly active antiretroviral therapy era. ⋯ In the highly active antiretroviral therapy era, up to 15% of HIV Outpatient Study patients used prolonged analgesic therapy each year. Variables associated with the initiation of prolonged analgesia included HIV and non-HIV-related factors.