Table 1 Baseline demographics, and clinical, endoscopic, and ambulatory 24 hour pH characteristics of the study patients.

Patient characteristics
n	35
Age (y) (median (range))	62 (32–84)
Sex (Male)	34 (97.1%)
BO length (cm) (median (range))	3 (2–6)
Hiatal hernia size (cm) (mean (SD))	3 (0–6)
Helicobacter pylori infection	3 (8.6%)
24 hour pH monitoring
Total time pH <4 (%) (median (range))	0.6 (0–29.9)
Supine time pH <4 (%) (median (range))	0 (0–47.2)
Upright time pH <4 (%) (median (range))	0.7 (0–47.9)
Maintenance PPI dose (mg) (median (range))	20 (20–80)

BO, Barrett's oesophagus; PPI: proton pump inhibitor.