Table 1.

Top 10 most used measures for brain health measurements

Measurement method	Category	Number of studies using this method (%)
Grey matter volume in specific region(s)	Imaging	133 (18.3)
White matter hyperintensities	Imaging	133 (18.3)
Total brain volume	Imaging	132 (18.2)
Whole brain grey matter volume	Imaging	106 (14.6)
Hippocampal volume	Imaging	105 (14.4)
Fractional anisotropy	Imaging	102 (14.0)
White matter volume in specific region(s)	Imaging	95 (13.1)
Trail making test A and/or B	Cognitive testing	86 (11.8)
Whole brain white matter volume	Imaging	77 (10.6)
Mini-Mental Status Examination	Cognitive testing	73 (10.0)

Row data are not mutually exclusive as many studies used more than one category of methods.