Brain BOLD MRI O2 and CO2 stress testing: implications for perioperative neurocognitive disorder following surgery

Table 3 First-level analysis CO₂ ramp

Subject	Voxel counts		Total imaged	% response to stimulus
Subject	Hyper	Inverse	p = 1.0	Hyper	Inverse
1	171,535	664	188,356	91.1	0.4
2	176,211	1088	191,764	91.9	0.6
3	149,610	475	171,395	87.3	0.3
4	147,991	0	175,213	84.5	0.0
5	140,787	879	163,827	85.9	0.5
6	143,022	4556	180,009	79.5	2.5
7	135,339	118	165,881	81.6	0.1
8	136,464	466	162,218	84.1	0.3
9	162,694	1442	189,248	86.0	0.8
10	165,279	294	178,274	92.7	0.2
11	155,785	1225	175,290	88.9	0.7
12	147,928	1750	170,293	86.9	1.0
Mean	152,720	1080	175,981	86.7	0.6
SD	13,586	1219	9970	4.0	0.7

Total with p = 1.0 all voxels imaged/subject
Hyper expected hypercapnic GLM fit to CO₂ ramp, Inverse inverse response GLM fit to CO₂ ramp, p = 0.001, Raw voxel counts gray matter + white matter inclusive mask

ISSN: 1364-8535