Statistical Analysis
Statistical analysis of the data was performed using the IBM SPSS 22
(SPSS Inc., Chicago, IL, USA) statistical package program. Descriptive
statistics for studied variables (characteristics) were presented as
mean, standard deviation, median, minimum and maximum values, and for
categorical variables the frequency is expressed as a percentage [n
(%)]. For determining the relationship between groups and categorical
variables, the Chi–square test was used. In order to compare H.
pylori –positive and H. pylori –negative groups for demographic,
clinical and laboratory characteristics, the Man–Whitney U test were
performed. The level of significance was set at p <
0.05.