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Table 4 First-level analysis O2 ramp

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

 

Voxel counts

Total imaged

% response to stimulus

Subject

Hyper

Inverse

p = 1.0

Hyper

Inverse

1

167,536

1018

189,485

88.4

0.5

2

162,894

37

192,232

84.7

0.0

3

104,446

10,378

172,364

60.6

6.0

4

164,438

49

174,910

94.0

0.0

5

158,102

1280

165,354

95.6

0.8

6

161,567

5672

179,049

90.2

3.2

7

143,566

4326

166,975

86.0

2.6

8

146,776

618

162,406

90.4

0.4

9

175,849

1432

189,268

92.9

0.8

10

163,619

6699

179,612

91.1

3.7

11

160,986

3395

175,470

91.7

1.9

12

158,532

1409

170,872

92.8

0.8

Mean

155,693

3026

176,500

88.2

1.7

SD

18,258

3194

9822

9.2

1.8

  1. Total with p = 1.0 all voxels imaged/subject
  2. Hyper expected hyperoxic GLM fit to O2 ramp, Inverse inverse response GLM fit to O2 ramp p = 0.001, Raw voxel counts gray matter + white matter inclusive mask