Table 2. Data representing the sub-group categorization based on HFnu-HRV K-mean classification.

	Controls		Crohn’s Disease (CD)		Irritable Bowel Syndrome (IBS)
Resting parasympathetic level	High (n = 15)	Low (n = 11)	High (n = 8)	Low (n = 13)	High(n = 12)	Low (n = 14)
HR (bpm)	68±2	65±3	71±4	65±3	64±2	66±2
RRI (ms)	894±35	928±41	879±58	938±45	940±30	912±28
Total Power (ms2)	982±134	718±157	492±184	973±134*	885±150	693±140
VLF (ms2)	323±65	275±76	202±89	493±70**	387±73	311±67
LFnu	39±3	68±3***	36±6	63±4**	34±3	66±3***
HFnu	57±2	27±3***	56±3	20±3***	57±2	28±2***
LF/HF	0.74±0.2	2.75±0.2***	0.71±0.8	3.89±0.6***	0.62±0.3	2.79±0.3***

Data are expressed as mean ± sem. Comparisons are made between low and high parasympathetic level using permutations test.

*p<0.05;

**p<0.01;

***p<0.001.