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Journal of Pediatric Gastroenterology & Nutrition:
doi: 10.1097/MPG.0b013e3182099018
Original Articles: Gastroenterology

Agreement Between Patient- and Physician-completed Pediatric Ulcerative Colitis Activity Index Scores

Lee, Jessica J*; Colman, Ruben J*; Mitchell, Paul D; Atmadja, Melissa L*; Bousvaros, Athos*; Lightdale, Jenifer R*

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Abstract

Objectives: Currently validated ulcerative colitis (UC) activity measures are physician based, but incorporate patient reports of symptoms. We aimed to assess whether patient-completed Pediatric UC Activity Index (PUCAI) scores are comparable to those of physician scores.

Patients and Methods: We performed a single-center prospective study to assess agreement between patient- and physician-completed PUCAI scores. Seventy patients with UC (ages 4–29) representative of all of the disease activity categories (inactive, mild, moderate, and severe) in the currently published physician-completed scoring system were recruited. Agreement was analyzed for PUCAI scores both as continuous and categorical measures. To ascertain validity, we compared both patient- and physician-completed PUCAI scores with the physician global assessment and serum inflammatory markers.

Results: Patient- and physician-completed PUCAI summary scores were identical 49% of the time, were different but within the minimal clinically important difference (MCID) of 20 points 48% of the time, and were at or beyond the MCID only 3% of the time. In general, patients reported higher mean disease severity on their questionnaires than did their physicians, with a mean difference in PUCAI scores of 3 ± 8 (95% confidence interval 2%–5%). A categorical comparison of the 2 sets of questionnaires using the disease activity groups demonstrated perfect agreement for 60 (86%) pairs (kappa coefficient 0.78; 95% confidence interval 0.65%–0.90%). Both patient- and physician-completed PUCAI scores also correlated well with the physician global assessment and serum inflammatory markers.

Conclusions: Our data indicate strong agreement between PUCAI scores obtained directly from patients and those completed by physicians. Hence, a patient-based PUCAI could complement existing instruments in both clinical and research settings.

Copyright 2011 by ESPGHAN and NASPGHAN

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