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. 2023 Jul 4;44(13):4722–4737. doi: 10.1002/hbm.26412

TABLE 1.

Characteristics of the study participants, i‐Share study, n = 857.

Characteristics N Mean ± SD %
Age, years 857 23.3 ± 2.6
Sex, %
Male 246 28.7
Female 611 71.3
Smoking status, %
No 631 73.6
Current 226 26.4
Pulse pressure, mmHg 857 47.8 ± 9.9
Systolic blood pressure, mmHg 857 124.6 ± 12.7
Diastolic blood pressure, mmHg 857 76.7 ± 8.2
High blood pressure
No 833 97.2
Yes 24 2.8
Body mass index, kg/m2 857 22.2 ± 3.6
Axial length, mm 857 23.7 ± 0.9
Peripapillary retinal nerve fiber layer, μm 856 96.5 ± 9.2
Macular ganglion cell‐inner plexiform layer, μm 857 84.3 ± 6.1
Macular ganglion cell complex, μm 843 117.4 ± 8.4
Brain volumes 857
WM volume, cm3 452.9 ± 46.5
WM fraction, % of TIV 32.6 ± 1.1
GM volume, cm3 676.4 ± 59.4
GM fraction, % of TIV 48.7 ± 1.6
TIV, cm3 1389.5 ± 125.5
Cortical thickness, mm 857 2.84 ± 0.08
Diffusion variables 854
Fractional anisotropy 0.54 ± 0.01
Mean diffusivity, 10−4 mm2/s 7.04 ± 0.16
Peak‐width of skeletonized mean diffusivity, 10−4 mm2/s 1.54 ± 0.14
Neurite density index 0.69 ± 0.027
Orientation dispersion index 0.20 ± 0.008

Abbreviations: GM, grey matter; TIV, total intracranial volume; WM, white matter.