Table 1.

Oesophageal acid exposure and DeMeester score measured 55 mm (conventional reflux) and 5 mm (short segment reflux) above the squamocolumnar junction

	% time pH <4 (Total)	% time pH <4 (Upright)	% time pH <4 (Supine)	DeMeester score
Conventional reflux	1.8% (0.8–4)	2.3% (0.9–4.3)	1.3% (0–6.1)	8 (4–19)
Short segment reflux	11.7% (2.4–36.3)	12.7% (2.3–32.1)	10.5% (1.2–42.9)	45 (12–131)
	p<0.001	p<0.001	p<0.001	p<0.001