Table 1.

Characteristics of the included patients.

Variables
Age (mean ± SD)	47.1 ± 14.4
	N (%)
Gender (female)	207 (67)
Clinical indication
○Pre-treatment/naïve	145 (47)
○Post-treatment/confirmation	162 (53)
UBT method
○IRMS	118 (38)
○NDIRS	189 (62)
History of peptic ulcer	14 (5)
H. pylori infection prevalence (by UBT)	% (95% CI)
○Overall	21 (16–26%)
○Pre-treatment/naïve	29 (21–37%)
○Post-treatment/confirmation	14 (8–19%)
	N = 307

N: number of patients included; CI: confidence intervals; UBT: urea breath test; IRMS: isotope ratio mass spectrometry; NDIRS: non-dispersive isotope-selective infrared spectrometry.