Xerostomia Inventory score, (unstimulated/stimulated) salivary flow rates,salivary amylase and mucin/ Mucin 5B levels, self-reported oral and dentalcomplaints, the oral health related quality of life, Simple Clinical ColitisActivity Index and inflammatory bowel disease-specific health relatedquality of life were determined. This evidence concerns the gene MUC5AC and xerostomia.