Translation, cross-cultural adaptation, validation, and diagnostic properties of the Arabic version of self-diagnosis questionnaire for Benign Paroxysmal Positional Vertigo.

Benign Paroxysmal Positional Vertigo (BPPV) is a common peripheral vestibular disorder, yet no validated Arabic BPPV-specific questionnaire is currently available. To translate and culturally adapt the self-diagnosis BPPV questionnaire into Arabic and to evaluate its psychometric and diagnostic properties. Following cross-cultural adaptation in accordance with established guidelines, 88 participants completed the Arabic version of the questionnaire. Psychometric and diagnostic properties were evaluated. Content validity was excellent (item-level indices ranging from 0.94 to 1.00 for both clarity and relevance, and a scale-level index of 0.98). Convergent validity demonstrated moderate to substantial agreement with positional test results (Cohen's κ values reaching 0.69). Known-groups validity showed fair to excellent discriminative ability (area under the curve values up to 0.84). Internal consistency was moderate for the screening questions (Cronbach's α = 0.720) but lower for subtype determination questions (Cronbach's α = 0.532). The screening component correctly classified (81.8%) participants, with sensitivity, specificity, PPV, NPV, PLR, and NLR of 87.2%, 75.6%, 80.4%, 83.8%, 3.58, and 0.17, respectively. Agreement for the affected ear and BPPV subtype was limited, with many undetermined cases. The Arabic self-diagnosis BPPV questionnaire demonstrated strong content validity, acceptable construct validity, and good diagnostic performance for screening BPPV.