Fig. 1

Variations of questionnaire score on FD symptoms. a mFSSG (Dyspepsia Score); b GSRS (Abdominal Pain); c GSRS (Indigestion). Orange and blue boxplot reflect the scores before and after taking sleep aids, respectively (n = 16). Statistical analysis was performed by using the Wilcoxon signed-rank test. *p < 0.05. FD functional dyspepsia, mFSSG modified frequency scale for the symptoms of gastroesophageal reflux disease, GSRS gastrointestinal symptom rating scale