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Table 1 Demographic and biomarker features of this population

From: Plasma Aβ42/40 ratio alone or combined with FDG-PET can accurately predict amyloid-PET positivity: a cross-sectional analysis from the AB255 Study

  Aβ-PET (−) Aβ-PET (+) p value
N (%) 41 (69.5%) 18 (30.5%)  
Age, mean (SD) 71.6 (4.11) 75.2 (5.65) p 0.014
Gender Female, n (%) 18 (43.9%) 9 (50.0%) p 0.665
APOE4 carriers, n (%) 6 (14.6%) 12 (66.7%) p < 0.001
Education level, mean years (SD) 12.33 (3.96) 10.56 (4.44) p 0.113
CN/a-MCI, n (% a-MCI) 35/6 (14.6%) 4/14 (77.8%) p < 0.001
TP42/40, mean (SD) 0.1329 (0.0208) 0.0997 (0.0197) p < 0.001
AD-Conv score, mean (SD) 0.133 (0.162) 0.384 (0.259) p < 0.001
  1. p value was obtained from Mann-Whitney or chi-squared tests as appropriate. SD standard deviation, CN cognitively normal, a-MCI amnestic mild cognitive impairment, amyloid-beta, TP42/40 total plasma Aβ42/40 ratio, AD-Conv score AD conversion score based on FDG-PET