Patients with postprandial distress syndrome experience problems with their interoceptive perceptual function to the gastric region, but their heartbeat perception is normal: a case control study

Table 2 WL5, HTT scores, and other measures: differences between PDS and HV

Variable	PDS		HV		P ^a
	(N = 16)		(N = 16)		P ^a
	Mean	(SD)	Mean	(SD)
WL5 (ml)	360.9	(170.0)	644.1	(297.0)	0.009*
HTT	0.599	(0.175)	0.623	(0.181)	0.647
PCS	38.0	(8.0)	48.7	(5.2)	0.000*
MCS	40.7	(8.5)	47.7	(7.5)	0.017*
HADS-anxiety	7.6	(4.9)	4.2	(3.4)	0.067
HADS-depression	7.7	(4.8)	3.5	(3.1)	0.007*
SSAS	33.1	(4.9)	29.8	(5.4)	0.094
TAS-20	55.3	(12.0)	48.2	(13.0)	0.094

^a Mann–Whitney U test; * P < 0.05
PDS, postprandial distress syndrome; HV, healthy volunteers; SD, standard deviation; WL5, five-minute water load test; HTT, heartbeat tracking task; PCS, physical component summary; MCS, mental component summary; HADS, Hospital Anxiety and Depression Scale; SSAS, Somatosensory Amplification Scale; TAS-20, Toronto Alexithymia Scale of 20 items

ISSN: 1751-0759