Significant effects on the quality of life may be the result of neck pain disrupting the patient’s activity of daily living, overall health, and work responsibilities. Not only does neck pain and disability are affecting health but it was also reported that individuals with neck pain are more likely to skip workdays and be unproductive. reported that one of three adults would experience neck pain in the course of 1 year, which creates a major health burden. Neck pain is considered to be the fourth leading cause of disability. The two-factor solutions were not tenable and a single latent factor solution might be a better fit. The present study explored the factorial structure of the NDI-Ar.

However, the analysis with the tests of closeness to unidimensionality, PA tests, and the more rigorous CFA indicated that the two-factor solutions were not tenable, and a single latent factor solution is a better fit with the observed data measured on Middle Eastern people. Results:ĮFA of the NDI-Ar suggested the presence of two-factor solutions. Parallel analysis (PA) and scree plot with the unidimensional congruence test, mean of item residual absolute loadings test, and explained common variance test were used to assess the number of the extractable factors and their unidimensionality. Exploratory factor analysis (EFA) was used to assess the existing factor structure within the 10-indicator NDI questionnaire. The Cronbach’s alpha test was used to test the reliability of the questionnaire. A total of 641 participants completed the NDI-Ar. Methods:Ī cross-sectional study conducted in Saudi Arabia.

We aimed to investigate the factorial structure of the Arabic NDI (NDI-Ar) using exploratory and confirmatory factor analysis (CFA) in a multioccupational sample. The most common validated tool assessing its effect on the participant’s functional status is the neck disability index (NDI). Neck pain is the fourth leading cause of disability.

Neck disability index spanish pdf