CORRInsights®: What is the Responsiveness and Respondent Burden of the New Knee Society Score?

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In the current study, Maniar and colleagues find that the New Knee Society Score (NKSS) is not only responsive to patient outcomes longitudinally, but also outperforms the more-dated WOMAC, SF-12, and the original Knee Society Score (OKSS) questionnaires by the same metrics. The “price” of this improvement is an extra minute, on average, spent by the patient completing the questionnaire. Noble and colleagues [4] suggest that the better performance of the NKSS may be due to more-sophisticated methodologies for devising scoring questionnaires and shifting TKA procedures to a younger, more-active population.
Improvements in statistical methods and computing power have defined the modern “big data” era, but good data are always more important than big data. The NKSS was devised because the OKSS showed specific deficiencies in reliability and responsiveness [4], and the current study supports the use of the NKSS in longitudinal studies using patient-reported outcomes after TKA.
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