Cross‐Cultural Adaptation and Psychometric Validation of a Simplified Chinese Version of the Brief Questionnaire of Olfactory Disorders

ABSTRACT Objectives To translate and culturally adapt the Brief Questionnaire of Olfactory Disorders into simplified Chinese and examine its measurement properties in adults with olfactory dysfunction. Methods The study included 192 patients and 40 controls; 27 patients completed a 7‐day retest. Translation involved forward/back translation, expert review, and cognitive interviews. Original components were analyzed separately. Reliability, exploratory structure, and external associations were examined using parallel retention screens and oblique minimum‐residual factor analysis. Results Item‐level content validity indices were 0.83–1.00; the scale‐level universal‐agreement index was 0.93. Component alpha values were 0.719, 0.891, and 0.860; absolute‐agreement retest intraclass correlations were 0.654, 0.714, and 0.764. Both parallel screens suggested two factors, overlapping the original components (factor correlation, 0.608). Components correlated negatively with self‐rated olfaction (rho, −0.326 to −0.513). Patients scored higher than controls, whose scores were uniformly zero. Recorded psychophysical associations were exploratory because 99 patients had all‐zero scores after non‐guessing responses. Conclusion The Chinese b‐QOD showed favorable content validity and component consistency, with provisional structural validity and uncertain short‐term reliability. Separate component reporting and independent confirmation remain necessary.