Articles: pain-measurement.
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We examined the relationship between pain distribution and measures of self-reported behavioral functioning, pain intensity, frequency, and quality in 51 patients with chronic pain. Results indicate that patients with more distributed pain report their pain as more disruptive to important areas of functioning and also report their pain as more intense and frequent. These results corroborate previous findings and suggest that pain distribution may be used as a useful clinical marker of disability status in chronic pain patients.
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Clinical Trial Controlled Clinical Trial
Morphine differentially affects the sensory and affective pain ratings in neurogenic and idiopathic forms of pain.
In a double-blind, placebo controlled crossover study, the effect of morphine on the affective and sensory pain ratings in different forms of chronic pain was investigated. Six patients suffering from central neurogenic pain, 8 from peripheral neurogenic pain and 6 from idiopathic pain participated in the study. Morphine (0.3 mg/kg bodyweight) and placebo (saline) were administered intravenously. ⋯ From our results it appeared that morphine reduced the affective but not the sensory dimension of pain sensation in both groups of neurogenic pain patients. In the idiopathic pain group, neither the affective nor the sensory dimension of pain sensation were affected. The observed differences in opioid responsiveness were neither the result of differences in opioid consumption nor of differences in baseline pain levels.
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The Pain Disability Index (PDI) was developed as a self-report measure of general and domain-specific, pain-related disability. This study's purpose was twofold: (1) to assess construct validity of the scale relative to other measures of pain-related disability and psychologic distress and (2) to assess the strength of the PDI, independent of pain intensity, in accounting for behavioral and psychologic aspects of disability. ⋯ Partial correlation controlling for pain intensity demonstrated PDI factor 1 was significantly related to depression, employment status, and medication usage. The finding supports the usefulness of the PDI in providing important information on functional disability beyond what is provided by a simple measure of pain intensity.