Table 2.

24 hour pH/impedance data between groups

	Treatment n=24	Control n=28	P value
MNBI, Ω, mean (SD)	1751 (1104)	2131 (1095)	0.219
AET, %, mean (SD)	8.7 (10)	4 (4.1)	0.108
RE, median (IQR)	64 (33.5)	55 (32.5)	0.373
Pathological GORD	13 (54.2)	8 (28.6)	0.061
FH	3 (12.5)	2 (7.1)	0.514
HO	0	5 (17.9)	0.029

Values are expressed as numbers (percentages) unless stated otherwise.

AET, acid exposure time; FH, functional heartburn; GORD, gastro-oesophageal reflux disease; HO, hypersensitive oesophagus; MNBI, mean nocturnal baseline impedance; RE, reflux events.