Cross-cultural adaptation, validation and psychometric properties of the Arabic version of the Nordic Musculoskeletal Questionnaire in office working population from Saudi Arabia.

ABSTRACT

BACKGROUND: Office-workers who suffer from musculoskeletal pain/disability may experience reduced productivity and absenteeism from work. The Nordic Musculoskeletal Questionnaire (NMQ) is a valid, simple screening tool for the history and presence of self-perceived musculoskeletal symptoms in both general public and occupational settings. OBJECTIVE: To translate and culturally adapt the NMQ into Arabic language and examine its psychometric properties. METHODS: The published guidelines were followed to translate and adapt the NMQ into Arabic using a forward-backward process. Construct validity involved comparing NMQ responses with disability-related musculoskeletal questionnaires in different body regions, including the Neck Disability Index (NDI), Oswestry Disability Index (ODI), Quick-Disability of the Arm, Shoulder, and Hand (Quick-DASH), and Reduced Western Ontario and McMaster Universities Osteoarthritis Index (ArWOMAC). The reliability was evaluated using Cronbach's alpha for internal consistency and prevalence-adjusted bias-adjusted kappa (PABAK) for test-retest reliability. RESULTS: The Arabic NMQ (Ar-NMQ) revealed excellent internal consistency (Cronbach's alpha = 0.85). For the test-retest reliability, the PABAK coefficient ranged between 0.50 and 1. The Ar-NMQ demonstrated strong construct validity. Participants reporting neck pain showed significantly elevated disability scores on the NDI (p < 0.05), while those with back pain exhibited higher ODI scores (p < 0.05). Moreover, individuals reporting shoulder, elbow, and wrist pain and disability displayed elevated Quick-DASH scores (p < 0.05). Similarly, participants reporting hip/thighs, knees, and ankle/feet pain/disability demonstrated significantly higher disability in ArWOMAC (p < 0.05). CONCLUSION: The NMQ was successfully translated and adapted into Arabic language, providing a reliable and valid instrument for assessing pain in specific body regions in the Arabic-speaking population.