• Erica J Tyler, Mark P Jensen, Joyce M Engel, and Lauren Schwartz.
• Department of Rehabilitation Medicine, University of Washington School of Medicine, Seattle 98195-6490, USA.
• Arch Phys Med Rehabil. 2002 Feb 1; 83 (2): 236-9.

ObjectiveTo evaluate the reliability and validity of 2 measures of pain interference in persons with cerebral palsy (CP).DesignStandardized interviews to assess pain and impact of pain on activities.SettingUniversity medical center.ParticipantsFifty adults with CP.InterventionsPatients asked to rate pain's intensity, interference with general activities, and depression levels.Main Outcome MeasuresPain interference scales: Chronic Pain Grade (CPG) and Brief Pain Inventory (BPI); rating of disability: Craig Handicap Assessment and Reporting Technique (CHART); rating of depression: Center for Epidemiologic Studies Depression (CES-D) Scale.ResultsMean interference of pain on 3 CPG items (pain interference with daily activities, social activities, work) were 1.74 +/- 2.45, 1.06 +/- 2.05, and.89 +/- 1.84 (out of 10), respectively. Mean interference on 10 modified BPI interference items ranged from 2.28 +/- 3.01 to 3.67 +/- 3.15 (out of 10). The composite CPG interference score did not correlate significantly with pain intensity. However, the composite BPI interference score did correlate significantly with pain intensity (r = .66, P < .01). There was no significant association shown between average pain and the CHART score (r = -.21, NS). Pain showed a significant association with CES-D score (r = .45, P < .05). Internal consistency of the 3 CPG items was inadequately low (Cronbach alpha = .59), whereas that of the 10 BPI items was excellent (.89).ConclusionsThe pain interference items of the BPI serve as a reliable and valid measure of pain's impact on persons with CP-related pain.Copyright 2002 by the American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation

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