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Table 1 Demographics

From: Estimated intracranial volume from FreeSurfer is biased by total brain volume

Group

All participants

Healthy controls

Probable dementia

Number of participants

62

29

25

Gender (male/female)

23/39

8/21

11/14

Age (years)

66.1 ± 8.0

66.4 ± 7.5

65.5 ± 8.8

Education (years)

11.0 (6.0, 23.0)

11.5 (7.0, 15.0)

10.0 (6.0, 23.0)

MMSE

28.5 (16.0, 30.0)

30.0 (27.0, 30.0)

25.0 (16.0, 30.0)

ICV (mL)

1506 ± 154

1498 ± 144

1512 ± 172

eTIV (mL)

1566 ± 158

1563 ± 154

1566 ± 171

TBV (mL)

1118 ± 120

1116 ± 113

1110 ± 138

eTIV versus ICV (mL)

59 ± 44

65 ± 46

53 ± 42

eTIV versus ICV (%)

4.0 ± 3.1

4.4 ± 3.2

3.6 ± 2.9

  1. Age, manually delineated intracranial volumes (ICV), FreeSurfer estimated intracranial volumes (eTIV), total brain volumes (TBV), and the difference between ICV and eTIV (eTIV versus ICV) written as millilitres (mL) and percent of ICV are all described with means and standard deviations, while education and Mini-Mental State Examination (MMSE) are described with medians with minimum and maximum values enclosed in brackets. Gender is given as the number of males and females. Descriptive statistics of the sample subgroups “Healthy controls” and “Probable dementia” are presented to allow for comparisons with samples from similar previous studies