. Author manuscript; available in PMC: 2010 Dec 1.

Published in final edited form as: Neurogastroenterol Motil. 2009 Jun 23;21(12):1294–e123. doi: 10.1111/j.1365-2982.2009.01338.x

Table 1.

Patient group demographics and defining features.

	Patient group
	Non-achalasia (n=94)	Achalasia (n=24)
Age (years)^a	52 (24 – 80)	50 (30 – 89)
Gender (F:M)	57 : 37	9 : 15
Distal esophageal shortening and/or prolonged LES relaxation^b	64 (68%)	15 (63%)
Distal esophageal shortening only	4	7
Prolonged LES relaxation^b only	10	1

Median (5^th – 95^th percentile)

Defined as any decrease in LES pressure