Table 2.

Characteristics of distal esophageal shortening and/or prolonged LES relaxation.

	Patient group
	Non-achalasia (n=64)	Achalasia (n=15)
Maximal shortening (cm)a	1.8 (0 – 7.4)	4.5 (0 – 5.7)†
Duration (s)a	17 (5 – 27)	21 (11 – 35)*
Nadir LES pressure (mmHg)a	0 (0 – 8.9)	32.0 (11.4 – 155.9)*

^aMedian (5^th – 95^th percentile)

^†p = 0.06

^*p < 0.05