• Spine · Jan 2025

    Age-adjusted Baseline NDI Values: An Analysis of Neck Pain Disability in the General American Population.

    • Patricia Lipson, Aiyush Bansal, Jean-Christophe Leveque, Rakesh Kumar, Takeshi Fujii, Venu M Nemani, and Philip K Louie.
    • School of Medicine, University of Washington, Seattle, WA.
    • Spine. 2025 Jan 15; 50 (2): 137144137-144.

    Study DesignSurvey-based, prospective study.ObjectiveIdentify age-adjusted baseline neck disability index (NDI) values in the American population.BackgroundThe NDI is the most widely used tool for assessing self-rated disability in patients with neck pain. Establishing baseline NDI values can aid in understanding the clinical impact of cervical spine pathologies and treatment interventions.Materials And MethodsAn internet-based survey was distributed using the Connect ( TM ) platform powered by CloudResearch. Based on the latest U.S. census, this survey was designed to engage a demographically representative sample of the U.S. adult population. We captured 699 individuals, aiming for 100 people per each 10-year age group between 18 and 89. Participants scored their disability using the NDI survey. Mean NDI scores stratified by age group and sex were calculated for each cohort.ResultsA total of 699 participants were included with 352 (50.4%) males and 347 (49.6%) females and an age distribution closely aligning with national demographics. The overall mean NDI for the combined age groups was 16.5 with a 95% CI of 15.5 to 17.5. The 18 to 29 age group had the lowest mean NDI of 12.3 (95% CI: 10.4, 14.2). Mean NDI scores increased until the 60 to 69 age group with a mean of 20.1 (95% CI: 17.3, 23.0) with women having a mean NDI of 22.2 (95% CI: 18.8, 25.7) compared with men with 15.4 (95% CI: 10.3, 20.4). Mean NDI scores decreased in the 70 to 79 and 80 to 89 age groups.ConclusionThis is the first study to assess age-adjusted baseline values of NDI in the U.S. population. Our findings demonstrate a disproportionate distribution of disability ratings across age groups. These data are important for health care professionals as it provides age and sex-specific levels of disability.Level Of EvidenceLevel III.Copyright © 2024 Wolters Kluwer Health, Inc. All rights reserved.

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