Table 2.

Abnormal Findings Among Asymptomatic Volunteers

IRP (mmHg)							Contractility (pattern)
Supine	Upright	Viscous	Solid	MRS	RDC		Supine	Upright	Viscous	MRS
17	14	16	15	12	10		Normal	Normal	Normal	Normal
16	10	8	13	6	8		Normal	Normal	Normal	Normal
15	19	9	-	8	7		Normal	Normal	Normal	Normal
15	13	-	12	5	–1		Normal	Normal	-	Normal
14	13	5	8	10	1		Normal	Normal	HC	Im-CR
9	16	9	23	7	7		HC	Normal	Normal	Normal
15	11	4	6	7	10		Normal	IEM	Normal	Normal
15	10	12	10	0	13		Normal	Normal	Normal	Im-INH
15	9	7	5	7	6		IEM	IEM	Normal	Normal
14	7	7	11	5	8		Normal	Normal	Normal	Im-CR
12	10	8	16	0	3		HC	Normal	Normal	Im-INH
12	9	7	6	6	4		Normal	Normal	IEM	Im-CR Im-INH
12	9	5	9	4	7		Normal	Normal	Normal	Im-CR
12	4	3	9	0	6		Normal	Normal	Normal	Im-INH
10	9	11	9	6	3		Normal	Normal	Normal	Im-CR Im-INH
10	9	3	3	0	2		Normal	Normal	Normal	Im-CR Im-INH
9	5	2	6	3	13		Normal	Normal	Normal	Normal
8	6	1	1	2	–3		Normal	Normal	Normal	Im-CR
8	6	-	13	0	–1		Normal	IEM	-	Normal
8	4	-	11	0	0		IEM	IEM	-	Im-CR
8	1	-	5	0	0		Normal	IEM		Normal
8	6	3	9	3	6		Normal	Normal	IEM	Normal
6	2	3	4	0	1		Normal	IEM	Normal	Im-CR
3	0	-	4	0	1		Normal	IEM	-	Normal
15	9	-	12	2	7		Normal	Normal	-	Normal
10	9	8	12	4	4		Normal	Normal	Normal	Normal
8	3	5	8	1	–4		Normal	Normal	Normal	Normal
8	2	4	2	4	9		Normal	Normal	Normal	Normal
7	1	0	0	0	3		Normal	Normal	Normal	Normal
13	7	6	7	6	7		Normal	Normal	Normal	Normal

MRS, multiple rapid swallows; RDC, rapid drink challenge; HC, hypercontractile swallow; Im-CR, impaired contractile reserve; IEM, ineffective esophageal motility; Im-INH, impaired inhibition during MRS.

Each row represents one asymptomatic volunteer. Findings considered “abnormal” are highlighted in gray: “Elevated” integrated relaxation pressure (IRP) was considered if the median value among test swallows was > 15 mmHg for supine 5 mL liquid swallows, viscous, or solid test swallows or > 12 mmHg for upright 5 mL liquid swallows, MRS, or RDC. IEM was considered if > 50% of test swallows were ineffective.