The validated Dutch version of the IBDQ was used in IBD patients. The IBDQ is a 32-item questionnaire assessing bowel symptoms, systemic symptoms, emotional function, and social function. All items use 7-point Likert scales for capturing symptom-related experiences during the past 2 weeks, where 1 represents the highest symptom frequency/severity and 7 indicates the lowest symptom frequency/severity. The total score ranges from 32 (poor quality of life) to 224 (good quality of life). IBDQ total score higher than 170 is usually associated with patients in clinical remission [15, 16].
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