Efficacy of small-volume simethicone given at least 30 min before gastroscopy

Table 1 Baseline characteristics of the patients n (%)

	Placebo group(n = 27)	Simethicone group(n = 27)	P vaule
Mean age (yr ± SD)	52.9 ± 15.5	57.7 ± 12.5	0.215
Male gender (%)	9 (33.3)	15 (55.6)	0.1
Mean premedication time (min:s ± SD)	41:08 ± 9:56	44:46 ± 12:36	0.245
Indication for gastroscopy
Dyspepsia	19 (70.4)	10 (37.0)	0.014
Reflux symptoms	3 (11.1)	6 (22.2)	0.467
Positive H. pylori serology	0	1 (3.7)	1
Variceal screen	1 (3.7)	2 (7.4)	1
Anemia	4 (14.8)	3 (11.1)	1
Dysphagia	0	1 (3.7)	1
Intestinal metaplasia surveillance	0	3 (11.1)	0.236
Cancer surveillance after endoscopic mucosal resection	0	1	1

H. pylori: Helicobacter pylori.