PURPOSE: To compare psychometric and responder burden characteristics between the Patient-Reported Outcomes Measurement Information System Physical Function Computer Adaptive Test (PF CAT) and the Disabilities of Arm, Shoulder, and Hand (DASH) instruments in a tertiary hand and upper extremity practice. METHODS: Adult patients who presented to the clinic of 2 hand and upper extremity surgeons in a university-based tertiary care center were enrolled in this study. Participants received the DASH and PF CAT administered via tablet computer. Time to completion was recorded for both the DASH and PF CAT. We conducted statistical analyses to calculate Pearson correlation coefficients between the 2 instruments and performed a Rasch item response theory analysis to determine dimensionality, reliability, ceiling and floor effects, and item bias for each instrument. RESULTS: A total of 134 patients were included. Time to completion for the DASH was 262 seconds, and for the PF CAT 57 seconds. The instruments had strong correlation (r = 0.726). The item and Pearson reliability were 0.97 and 0.94, respectively, for the DASH and 0.99 and 0.96 for the PF CAT. The DASH and PF CAT had 5% and 5% of unexplained variance, respectively. The DASH exhibited 5% of ceiling effect and 1% floor effect whereas the PF CAT had no ceiling or floor effects. CONCLUSIONS: The psychometric characteristics of the Patient-Reported Outcomes Measurement Information System PF CAT instrument compared favorably with the DASH in a tertiary upper extremity practice. Patient time burden was significantly reduced with the PF CAT compared with the DASH. TYPE OF STUDY/LEVEL OF EVIDENCE: Diagnostic III.
PURPOSE: To compare psychometric and responder burden characteristics between the Patient-Reported Outcomes Measurement Information System Physical Function Computer Adaptive Test (PF CAT) and the Disabilities of Arm, Shoulder, and Hand (DASH) instruments in a tertiary hand and upper extremity practice. METHODS: Adult patients who presented to the clinic of 2 hand and upper extremity surgeons in a university-based tertiary care center were enrolled in this study. Participants received the DASH and PF CAT administered via tablet computer. Time to completion was recorded for both the DASH and PF CAT. We conducted statistical analyses to calculate Pearson correlation coefficients between the 2 instruments and performed a Rasch item response theory analysis to determine dimensionality, reliability, ceiling and floor effects, and item bias for each instrument. RESULTS: A total of 134 patients were included. Time to completion for the DASH was 262 seconds, and for the PF CAT 57 seconds. The instruments had strong correlation (r = 0.726). The item and Pearson reliability were 0.97 and 0.94, respectively, for the DASH and 0.99 and 0.96 for the PF CAT. The DASH and PF CAT had 5% and 5% of unexplained variance, respectively. The DASH exhibited 5% of ceiling effect and 1% floor effect whereas the PF CAT had no ceiling or floor effects. CONCLUSIONS: The psychometric characteristics of the Patient-Reported Outcomes Measurement Information System PF CAT instrument compared favorably with the DASH in a tertiary upper extremity practice. Patient time burden was significantly reduced with the PF CAT compared with the DASH. TYPE OF STUDY/LEVEL OF EVIDENCE: Diagnostic III.
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