<i>H</i>. <i>pylori</i> infection, and clinical variables in FD subjects.

Data are expressed as median (IQR, interquartile range), mean (SD, standard deviation), or percentage (%) of the total. For parametric continuous variables, Students’ t-test was used. For non-parametric continuous variables, Wilcoxon rank sum test was used. For categorical variables, Chi-square test was used. ns: non-significant.