Establishing the Cross-Cultural Validity of the Immune Status Questionnaire Using Rasch Analysis
Reliable assessment of self-reported immune function is essential for identifying at-risk populations, monitoring public health interventions and informing global health strategies. Yet, current instruments are imprecise and lack cross-cultural validity. This study aimed to assess the cross-cultural validity of the 7-item Immune Status Questionnaire (ISQ). The Partial Credit Rasch model was applie
