Table 2.

Clinical features at HRM

	Normal	Minor	Weak Peristalsis	Weak peristalsis small break	Weak peristalsis large break	Frequent failed peristalsis	Hypertensive esophagus
Female	69.3% (115/166)	65.9% (89/135)	65.9%(54/82)	72.7% (40/55)	51.9% (14/27)	52.9% (9/17)	70.6% (24/34)
Age (years)	46.9 (18.6– 87.4)	55.3‡ (20.2– 86.7)	56.5‡ (20.2–86.7)	55.6‡ (20.2– 86.7)	58.4† (27.7– 85.6)	49.5 (25.9– 78.2)	54.2‡ (31.1–83)
Esophagitis/Barrett’s*	10.4% (12/115)	7.9% (8/101)	11.3% (7/62)	11.1% (5/45)	11.8% (2/17)	7.1% (1/14)	0% (0/25)
Abnormal emptying on esophagram#	13.8% (4/29)	27.6% (8/29)	21.1% (4/19)	14.3% (2/14)	40% (2/5)	0% (0/3)	57.1%† (4/7)

^*LA Grade A-D reflux esophagitis or histologically confirmed Barrett’s

^#Abnormal peristalsis or delayed passage of a 13mm barium tablet

^†p<0.05 when compared to patients with normal esophageal manometry

^‡p<0.001 when compared to patients with normal esophageal manometry