Table 3.

Correlations of cardiovascular parameters with Glasgow Coma Scale (GCS) scores and with the interval since trauma in patients with a history of mild, moderate or severe TBI

Parameters	Position	Correlation with GCS in all TBI patients	Correlation with interval since trauma (months)
			All TBI patients	Mild-TBI patients	Moderate–severe TBI patients
RESP (cpm)	Supine	ρ = –0.246, P = 0.175	ρ = 0.081, P = 0.621	ρ = 0.215, P = 0.363	ρ = 0.047, P = 0.845
	Standing	ρ = 0.005, P = 0.979	ρ = 0.107, P = 0.527	ρ = –0.015, P = 0.950	ρ = 0.363, P = 0.152
BPsys (mmHg)	Supine	ρ = –0.202, P = 0.269	ρ = –0.055, P = 0.736	ρ = –0.358, P = 0.121	ρ = –0.013, P = 0.957
	Standing	ρ = –0.161, P = 0.388	ρ = 0.091, P = 0.581	ρ = –0.146, P = 0.552	ρ = 0.181, P = 0.444
BPdia (mmHg)	Supine	ρ = –0.194, P = 0.288	ρ = –0.107, P = 0.511	ρ = –0.367, P = 0.112	ρ = –0.082, P = 0.731
	Standing	ρ = –0.274, P = 0.136	ρ = 0.074, P = 0.656	ρ = 0.009, P = 0.972	ρ = 0.102, P = 0.668
RRI (ms)	Supine	ρ = –0.085, P = 0.645	ρ = 0.160, P = 0.325	ρ = –0.044, P = 0.855	ρ = 0.302, P = 0.195
	Standing	ρ = 0.012, P = 0.946	ρ = 0.166, P = 0.307	ρ = 0.072, P = 0.762	ρ = 0.199, P = 0.401
RRI-SD (ms)	Supine	ρ = –0.029, P = 0.876	ρ = 0.356, P = 0.024	ρ = 0.559, P = 0.010	ρ = 0.138, P = 0.560
	Standing	ρ = 0.153, P = 0.404	ρ = 0.187, P = 0.247	ρ = 0.385, P = 0.094	ρ = 0.037, P = 0.877
RRI-CV (%)	Supine	ρ = 0.038, P = 0.836	ρ = 0.315, P = 0.048	ρ = 0.594, P = 0.006	ρ = 0.041, P = 0.862
	Standing	ρ = 0.162, P = 0.375	ρ = 0.129, P = 0.429	ρ = 0.319, P = 0.171	ρ = 0.031, P = 0.897
RMSSD (ms)	Supine	ρ = –0.071, P = 0.698	ρ = 0.329, P = 0.038	ρ = 0.430, P = 0.058	ρ = 0.197, P = 0.405
	Standing	ρ = 0.006, P = 0.976	ρ = 0.129, P = 0.429	ρ = 0.214, P = 0.366	ρ = 0.076, P = 0.750
RRI-30:15 ratio	Standing	ρ = –0.050, P = 0.856	ρ = 0.036, P = 0.828	ρ = –0.065, P = 0.786	ρ = 0.136, P = 0.567
LF-RRI powers (ms2)	Supine	ρ = –0.094, P = 0.609	ρ = 0.365, P = 0.021	ρ = 0.532, P = 0.016	ρ = 0.148, P = 0.533
	Standing	ρ = 0.136, P = 0.458	ρ = 0.136, P = 0.403	ρ = 0.359, P = 0.120	ρ = –0.059, P = 0.806
LFnu-RRI powers (%)	Supine	ρ = –0.148, P = 0.419	ρ = 0.110, P = 0.499	ρ = 0.077, P = 0.748	ρ = 0.120, P = 0.615
	Standing	ρ = 0.436, P = 0.013	ρ = –0.107, P = 0.511	ρ = 0.065, P = 0.787	ρ = –0.321, P = 0.167
HF-RRI powers (ms2)	Supine	ρ = 0.046, P = 0.803	ρ = 0.280, P = 0.080	ρ = 0.417, P = 0.068	ρ = 0.168, P = 0.479
	Standing	ρ = –0.149, P = 0.416	ρ = 0.134, P = 0.411	ρ = 0.150, P = 0.527	ρ = 0.164, P = 0.490
HFnu-RRI powers (%)	Supine	ρ = 0.148, P = 0.419	ρ = –0.110, P = 0.499	ρ = –0.077, P = 0.748	ρ = –0.120, P = 0.615
	Standing	ρ = – 0.436, P = 0.013	ρ = 0.107, P = 0.511	ρ = –0.065, P = 0.787	ρ = 0.321, P = 0.167
LF/HF-RRI ratios	Supine	ρ = –0.238, P = 0.189	ρ = 0.128, P = 0.433	ρ = 0.074, P = 0.758	ρ = 0.134, P = 0.573
	Standing	ρ = 0.436, P = 0.013	ρ = –0.107, P = 0.511	ρ = 0.065, P = 0.787	ρ = –0.321, P = 0.167
LF-BPsys powers (mmHg2)	Supine	ρ = 0.026, P = 0.889	ρ = 0.017, P = 0.917	ρ = 0.382, P = 0.097	ρ = –0.378, P = P = 0.100
	Standing	ρ = 0.164, P = 0.377	ρ = –0.204, P = 0.213	ρ = –0.107, P = 0.663	ρ = – 0.451, P = 0.046
HF-BPsys powers (mmHg2)	Supine	ρ = –0.008, P = 0.967	ρ = 0.016, P = 0.924	ρ = 0.141, P = P = 0.552	ρ = –0.054, P = 0.821
	Standing	ρ = –0.249, P = 0.177	ρ = –0.233, P = 0.153	ρ = –0.475, P = 0.040	ρ = 0.160, P = 0.502
BRS	Supine	ρ = –0.035, P = 0.848	ρ = 0.296, P = 0.063	ρ = 0.334, P = 0.150	ρ = 0.338, P = 0.145
	Standing	ρ = 0.049, P = 0.792	ρ = 0.246, P = 0.132	ρ = 0.405, P = 0.085	ρ = 0.202, P = 0.392

RESP respiration, BPsys systolic blood pressure, RRI RR interval, SD standard deviation, CV coefficient of variance, RMSSD square root of mean squared differences of successive RRIs, LF low frequency, LFnu normalized LF powers, HF high frequency, HFnu normalized HF powers, BRS baroreflex sensitivity

Significant correlations are indicated in bold and italic fonts