Context: Monitoring of health-related quality of life and symptoms of patients with brain tumors is needed yet not always feasible. This is partially due to lack of brief-yet-precise assessments with minimal administration burden that are easily incorporated into clinics. Dynamic computerized adaptive testing (CAT) or static fixed-length short forms, derived from psychometrically sound item banks, are designed to fill this void.
Objective: This study evaluated the comparability of scores obtained from CATs and short forms.
Methods: Patients (ages 7-22 years) were recruited from brain tumor clinics and completed Patient-Reported Outcome Measurement Information System CATs and short forms (Fatigue, Mobility, Upper Extremity, Depressive Symptoms, Anxiety, and Peer Relationships). Pearson correlations, paired t-tests, and Cohen's d were used to evaluate the relationship, significant differences, and the magnitude of the difference between these two scores, respectively.
Results: Data from 161 patients with brain tumors were analyzed. Patients completed each CAT within 2 minutes. Scores obtained from CATs and short forms were highly correlated (r = 0.95-0.98). Significantly different CAT vs. short-form scores were found on 4 (of 6) domains yet with negligible effect sizes (|d| < 0.09). These relationships varied across patients with different levels of reported symptoms, with the strongest association at the worst or best symptom scores.
Conclusions: This study demonstrated the comparability of scores from CATs and short forms. Yet the agreement between these two varied across degrees of symptom severity which was a result of the ceiling effects of static short forms. We recommend CATs to enable individualized assessment for longitudinal monitoring.
Keywords: Children; PROMIS; brain tumor; computerized adaptive testing (CAT); patient-centered outcomes.
Copyright © 2017 American Academy of Hospice and Palliative Medicine. Published by Elsevier Inc. All rights reserved.