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Table 1 Participant characteristics

From: Cross-sectional associations of plasma vitamin D with cerebral β-amyloid in older adults at risk of dementia

Variable Value (n = 178)
Age (years) 76.2 ± 4.4
Sex, women 106 (59.6%)
Education
 No diploma or primary school certificate 47 (26.6%)
 Secondary education no high-school diploma 49 (27.7%)
 High school diploma 24 (13.6%)
 University level 57 (32.2%)
MAPT group allocation
 Multidomain intervention 39 (21.9%)
 n-3 PUFA supplementation 42 (23.6%)
 Multidomain intervention and n-3 PUFA supplementation 49 (27.5%)
 Placebo 48 (27.0%)
Season of vitamin D measurement
 Winter 71 (39.9%)
 Spring 37 (20.8%)
 Summer 15 (8.4%)
 Autumn 55 (30.9%)
BMI (kg/m2) 26.6 ± 4.0
CDR 0.5 79 (44.4%)
MMSE score (/30) 28.3 ± 1.6
ApoE ε4 carriersa 42 (25.6%)
25-Hydroxyvitamin D (ng/ml) 22.4 ± 10.8
 25-Hydroxyvitamin D <  20 ng/ml 81 (45.5%)
 25-Hydroxyvitamin D ≥ 20 ng/ml ≤ 30 ng/ml 56 (31.5%)
 25-Hydroxyvitamin D >  30 ng/ml 41 (23.0%)
Cortical SUVR 1.2 ± 0.2
 Cortical SUVR positive (≥ 1.17) 75 (42.1%)
  1. Age, CDR, BMI and MMSE score closest to the PET scan are presented
  2. Data expressed as mean ± standard deviation or absolute value (percentage)
  3. BMI body mass index, CDR Clinical Dementia Rating, MAPT Multidomain Alzheimer Preventive Trial, n-3 PUFA omega-3 polyunsaturated fatty acid, MMSE Mini Mental State Examination, ApoE apolipoprotein E, SUVR standard uptake ratio values
  4. aApoE status available for n = 164