| Summary: | Aims: To determine the test-retest reliability and responsiveness of a new computerized 20-item pain measure, SUPER-KIDZ, in children with juvenile idiopathic arthritis (JIA).
Methods: A single centre prospective cohort study of JIA patients aged 8-18 years was performed. For each SUPER-KIDZ item, test-retest reliability analysis was done in patients expected to have stable pain, and responsiveness was evaluated after intra-articular steroid injection(s).
Results: Fifty-one subjects were included. Good internal consistency (α=0.73-0.92) was demonstrated for the 3 SUPER-KIDZ domains. Acceptable test-retest reliability (intraclass correlation coefficient or kappa ≥0.80) was found for 15 SUPER-KIDZ items. At 2 weeks post-injection, 16 items were responsive to change in pain (standardized response mean=0.66-0.82, significant Wilcoxon signed rank and linear mixed model).
Conclusions: The majority of the SUPER-KIDZ items have acceptable test-retest reliability and responsiveness properties. If validity is demonstrated, this measure could be implemented as a standardized comprehensive pain tool for JIA patients.
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