Validation of the pediatric version of the Graded Chronic Pain Scale Revised in school-aged children and adolescents.

ABSTRACT:The Graded Chronic Pain Scale (GCPS) was originally developed to grade the severity of chronic pain conditions in adults. A revised version of this instrument (ie, GCPS-R) has been developed for use with adults to account for advances in pain metrics and new operational definitions of chronic pain and high-impact chronic pain. The purpose of the current study was to adapt the GCPS-R for use with pediatric samples (P-GCPS-R) and evaluate the adapted measure's concurrent validity. One thousand five hundred sixty-four school-aged children and adolescents (55% girls; 8-18 years) completed the P-GCPS-R and provided responses to measures of physical health, anxiety and depressive symptoms, maladaptive pain coping strategies, and activity limitations. Results showed that 14% of participants had chronic pain, of which 37% (5% of the whole sample) had mild chronic pain, 45% (6% of the whole sample) bothersome chronic pain, and 18% (3% of the whole sample) high-impact chronic pain. Participants without chronic pain and those with mild chronic pain showed no significant between-group differences in any of the study measures. Participants with bothersome chronic pain and high-impact chronic pain reported worse physical health, more anxiety and depressive symptoms, pain catastrophizing, and activity limitations than those with mild chronic pain. Participants with high-impact chronic pain reported more activity limitations than those with bothersome chronic pain. The findings support the concurrent validity of the P-GCPS-R for use with pediatric samples.