Fig. 4

The frequency of having other GI symptoms is associated with having meal-related abdominal pain more frequently. Mixed ordinal regression models with the frequency of meal-related pain (11-item scale, 0–100%) as outcome indicated that having meal-related abdominal pain more frequently was associated with having other GI symptoms more frequently. The frequency of all other GI symptoms questioned in the Adult Diagnostic Rome IV questionnaire was used as an independent variable for the separate mixed ordinal regression models. Country was included as a random intercept effect to account for variability among countries. OR > 1 corresponds to higher odds of having meal-related abdominal pain more frequently. All models were corrected for the following confounders: demographical variables (age, gender, education, BMI) and psychological distress. *not associated with a bowel movement. **without laxative medication or enema