Diagnostic value of digital continuous bowel sounds in critically ill patients with acute gastrointestinal injury: A prospective observational study

Table 9 Comparison of clinical variables between groups

Group-group	P value
	Mean bowel sound rate	Duration of bowel sounds	Amplitude of bowel sounds	Average frequency of bowel sounds	Interval time between bowel sounds	Gastrin	Acute Physiology and Chronic Health Evaluation II
III-II	1.000	1.000	1.000	1.000	1.000	0.265	1.000
III-I	1.000	1.000	1.000	1.000	1.000	0.034a	1.000
II-I	1.000	1.000	1.000	1.000	1.000	1.000	0.354
III-non-AGI	0.066	0.043a	0.060	0.080	0.218	0.370	1.000
II-non-AGI	0.002b	0.018a	0.017a	0.004b	0.002b	1.000	0.018a
I-non-AGI	< 0.001b	< 0.001b	< 0.001b	< 0.001b	< 0.001b	0.172	0.515

^aP < 0.05.

^bP < 0.01.

I, II, III, and non-acute gastrointestinal injury (AGI) are the AGI I group, AGI II group, AGI III group, and non-AGI group, respectively. AGI: Acute gastrointestinal injury.