Common Contracts

Agreement between Original and Rasch-Approved Neck Disability Index

June 17th, 2020

• Filed
  June 17th, 2020

Given the high prevalence of neck pain, the neck disability index (NDI) has been used to evaluate patient status and treatment outcomes. Modified versions were proposed as solutions to measurement deficits in the NDI. However, the original 10-item NDI scored out of 50 is still the most administered. Examining the extent of agreement between traditional and Rasch-based versions using Bland-Altman (B&A) plots will inform our understanding of score differences that might rise from using different versions.