Table 2.

Statistical analysis of the presented results.

Comparison	U	nc	nmTBI	P	Δ	CL
Population age	0.18	70	109	0.86	–	–
Self-reported past head hits	3.51	69	64	<0.01	1.00	0.57
Pulsatility index, first 48 h	−3.10	109	11	<0.01	−0.113	0.78
Resistivity index, first 48 h	−2.86	109	11	<0.01	−0.042	0.76
P2R, first 48 h	2.62	109	11	<0.01	0.071	0.74
Breath hold index (BHI), first 48 h	−0.42	109	11	0.67	−1.79	0.46
BHI, 2–3 days post-injury	2.72	109	17	<0.01	13.56	0.71
BHI, 4–5 days post-injury	2.46	109	23	0.014	6.54	0.66
BHI, 6–7 days post-injury	2.38	109	27	0.018	5.85	0.65
BHI, 8–9 days post-injury	1.83	109	23	0.067	4.59	0.62
End-tidal CO2 after breath hold	−0.648	174	105	0.517	−0.007	0.52