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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