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Table 2 Test-retest analysis of SUV relative to whole brain mean activity (SUVRWB)

From: Test-retest analysis of a non-invasive method of quantifying [11C]-PBR28 binding in Alzheimer’s disease

 

Mean test value

Mean retest value

Mean regional difference % (SD)

Mean VAR% (SD)a

ICC

Sample size to detect 5 % changeb

Sample size to detect 10 % changeb

Frontal lobe

1.08

1.08

0.096

(1.42)

−0.09

(1.41)

0.96

4

3

Parietal lobe

1.03

1.04

0.96

(0.81)

−0.95

(0.80)

0.98

3

3

Temporal lobe

1.04

1.03

−0.36

(0.73)

0.37

(0.73)

0.90

3

3

Occipital lobe

1.07

1.06

−0.51

(1.35)

0.52

(1.37)

0.91

4

3

Hippocampus

0.94

0.95

0.71

(2.09)

−0.69

(2.06)

0.97

5

3

Parahippocampus

1.01

1.03

1.64

(3.07)

−1.59

(2.98)

0.48

7

4

Posterior cingulate

1.15

1.17

1.92

(1.36)

−1.89

(1.33)

0.98

4

3

Amygdala

1.07

1.07

0.35

(5.79)

−0.21

(5.77)

0.69

17

6

Cerebellum

1.17

1.13

−3.24

(5.40)

3.42

(5.74)

0.63

15

6

Mean

(SD)

1.06

(0.07)

1.06

(0.06)

0.17

(2.45)

−0.13

(2.47)

0.83

7

4

  1. ICC intraclass correlation coefficient
  2. aVAR = absolute variability (%)
  3. bModel parameters: two-tailed, power 0.9, alpha 0.05