Ultrasonographic study of postcibal gastro-esophageal reflux and gastric emptying in infants with recurrent respiratory disease

Table 6 Ultrasonographic characteristics of gastro-esophageal reflux in infants with recurrent respiratory diseases, with or without daily regurgitation

	With dailyregurgitation	Without dailyregurgitation	P
Subjects	20 (57%)	15 (43%)	NS
Number of reflux episodes (N)	10.5 (5-21)	8 (2-18)	<0.03
Reflux frequency (N/min)	0.5 (0.25-1.05)	0.4 (0.1-0.9)	<0.03
Maximal esophageal lumen enlargement (mm)	5 (1.5-17)	4 (1.0-11.5)	NS
Duration of the longest reflux episode (s)	11.5 (3-17)	7 (2-18)	<0.01

Results are expressed as median (range). Differences between groups were tested by using Mann–Whitney U test. NS: not significantly different.