Table 3.

Results of Welch’s t-test significance and values of compared means (with confidence intervals) for ’incident’ vs. ’non-incident’ episodes calculated for various HRV parameters within motion clusters that contained a sufficient number of ’incident’ events. Asterisks indicate statistically significant results: * p < 0.05; ** p < 0.01.

	ClusterID (No. of Incident/Non-Incident Episodes)
	1 (25/166)	2 (3/48)	6 (11/151)	8 (5/126)
SDNN (ms)	p = 0.312	p = 0.608	p = 0.203	p = 0.271
incident	117.92 ± 41.52	83.47 ± 35.30	112.12 ± 50.22	98.96 ± 27.27
non-incident	128.61 ± 65.50	107.45 ± 48.97	134.62 ± 64.33	27.27 ± 56.94
SDNNIDX (ms)	p = 0.166	p = 0.522	p = 0.050 *	p = 0.083
incident	93.52 ± 46.06	74.73 ± 43.20	99.24 ± 50.84	76.68 ± 19.02
non-incident	104.52 ± 59.65	95.65 ± 47.51	110.80 ± 60.70	19.02 ± 54.30
pNN50 (%)	p = 0.225	p = 0.735	p = 0.084	p = 0.018 *
incident	18.61 ± 13.89	11.88 ± 11.45	15.92 ± 14.29	13.99 ± 9.53
non-incident	23.30 ± 16.05	22.21 ± 14.17	26.36 ± 16.81	9.53 ± 16.58
SDSD (ms)	p = 0.225	p = 0.735	p = 0.084	p = 0.018 *
incident	65.00 ± 44.10	61.43 ± 47.03	60.93 ± 47.39	44.16 ± 16.89
non-incident	78.71 ± 58.71	81.26 ± 47.61	92.33 ± 61.78	16.89 ± 48.14
rMSSD (ms)	p = 0.308	p = 0.471	p = 0.447	p = 0.106
incident	64.98 ± 44.08	61.41 ± 47.01	60.92 ± 47.37	44.15 ± 16.88
non-incident	78.65 ± 58.54	81.17 ± 47.55	92.22 ± 61.52	16.88 ± 48.12
IRRR (ms)	p = 0.173	p = 0.607	p = 0.020 *	p = 0.069
incident	151.52 ± 63.06	80.00 ± 37.00	154.00 ± 97.90	115.00 ± 18.11
non-incident	168.31 ± 110.14	120.23 ± 74.10	177.93 ± 117.43	18.11 ± 85.11
MADRR (ms)	p = 0.991	p = 0.793	p = 0.922	p = 0.882
incident	20.64 ± 12.09	14.00 ± 10.00	16.27 ± 11.28	18.00 ± 8.17
non-incident	25.16 ± 17.99	20.84 ± 12.91	26.52 ± 16.03	8.17 ± 18.49
TINN (ms)	p = 0.991	p = 0.793	p = 0.922	p = 0.882
incident	335.49 ± 98.45	214.78 ± 102.79	315.20 ± 80.28	311.77 ± 23.04
non-incident	333.28 ± 136.37	243.49 ± 105.54	306.71 ± 105.84	23.04 ± 144.73
HRVi	p = 0.225	p = 0.735	p = 0.084	p = 0.018 *
incident	21.47 ± 6.30	13.75 ± 6.58	20.17 ± 5.14	19.95 ± 1.47
non-incident	21.33 ± 8.73	15.58 ± 6.75	19.63 ± 6.77	1.47 ± 9.26
SD1 (ms)	p = 0.331	p = 0.576	p = 0.246	p = 0.367
incident	45.96 ± 31.18	43.43 ± 33.25	43.09 ± 33.51	31.23 ± 11.94
non-incident	55.65 ± 41.51	57.46 ± 33.66	65.29 ± 43.68	11.94 ± 34.04
SD2 (ms)	p = 0.008 **	p = 0.648	p = 0.121	p = 0.021 *
incident	159.42 ± 52.28	108.34 ± 41.15	151.51 ± 65.12	136.26 ± 37.24
non-incident	172.22 ± 84.50	139.49 ± 62.37	177.44 ± 82.81	37.24 ± 74.53
$D_2$	p = 0.010 **	p = 0.400	p = 0.095	p = 0.296
incident	1.44 ± 0.06	1.25 ± 0.13	1.43 ± 0.04	1.46 ± 0.02
non-incident	1.35 ± 0.33	1.28 ± 0.35	1.39 ± 0.21	0.02 ± 0.15
ScalExp	p = 0.157	p = 0.767	p = 0.053	p = 0.015 *
incident	1.01 ± 0.11	1.19 ± 0.22	1.07 ± 0.20	1.05 ± 0.19
non-incident	0.91 ± 0.21	0.86 ± 0.29	0.92 ± 0.25	0.19 ± 0.23