Albanian Version of Neck Disability Index Demonstrates Strong Psychometric Properties in Neck Pain Cohort

This cohort study assessed the psychometric properties of the Albanian version of the Neck Disability Index (ANDI) among 566 patients with neck pain. The publication type was a psychometric evaluation, and the setting was not reported. The intervention or exposure involved administering the ANDI to evaluate its validity and reliability within this specific population. No comparator was reported for this evaluation. Follow-up duration was not reported.

Primary outcomes focused on psychometric properties, showing excellent reliability for internal consistency with Cronbach's alpha ranging from 0.981 to 0.993. Test–retest reliability (ICC2,1) also demonstrated excellent reliability with effect sizes between 0.981 to 0.993. Measurement error showed strong measurement precision, with the Standard Error of Measurement (SEM) ranging from 0.104–0.178 and the Minimal Detectable Change (MDC) ranging from 0.288–0.493. Item–total correlations exceeded 0.96, and exploratory factor analysis supported a unidimensional structure with a Kaiser-Meyer-Olkin value of 0.947. These metrics indicate high consistency across the assessment items.

Safety data regarding adverse events, serious adverse events, discontinuations, and tolerability were not reported. Limitations were not reported in the provided data. Funding or conflicts of interest were not reported. Practice relevance was not reported. Clinicians should interpret these psychometric findings as specific to the Albanian language context and the study population. Further research is needed to establish clinical utility beyond measurement properties. External validation is required before widespread adoption. Additional studies are recommended.