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Table 1 Baseline characteristics of the study population

From: Plasma amyloid-β levels, cerebral atrophy and risk of dementia: a population-based study

Variables Subsample of Rotterdam Study
(n = 458)
Demographic and vascular risk factors
 Age, yr, mean (SD) 67.8 (7.7)
 Women, n (%) 232 (50.7)
 Education, yr, mean (SD) 10.7 (3.4)
 Mean arterial blood pressure, mmHg, mean (SD) 96.5 (12.7)
 Total cholesterol, mmol/L, mean (SD) 5.7 (0.93)
 Diabetes mellitus, n (%) 55 (12.1)
 Smoker, ever, n (%) 317 (69.7)
 APOE-ε4 carriers, n (%) 137 (30)
Plasma levels of Aβ isoforms, pg/ml, mean (SD)
 Aβ1–38 19.4 (4.3)
 Aβ1–40 186.1 (35.9)
 Aβ1–42 56.3 (6.2)
MRI markers, ml, mean (SD)
 White matter volume 354.1 (85.4)
 Gray matter volume 522.7 (55.8)
 Intracranial volume 1126.2 (113.9)
 Hippocampus volume 6.4 (0.9)
  1. Abbreviations: , APOE Apolipoprotein, Amyloid-β, MRI Magnetic resonance imaging