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. 2020 Sep 4;75(12):2441–2449. doi: 10.1093/gerona/glaa221

Table 1.

Sample Characteristics Derived From Baseline, If Not Stated Otherwise

Total Sample, N = 1780 Age ≤ 72, n = 1185 Age ≥ 78, n = 595
Number of follow-up assessments 3.0 (0.8) 2.9 (0.6) 3.2 (1.1)
Odor identification score, mean (SD) 12.1 (2.8) 12.8 (2.3) 10.6 (3.1)
Age, mean (SD) 71.0 (9.4) 65.3 (4.8) 82.5 (4.6)
Female % 61.9 58.6 68.4
Years of education, mean (SD) 12.6 (4.2) 13.5 (4.2) 10.8 (3.8)
Manufacturing profession, % 17.9 13.8 27.7
Vocabulary (SRB1), mean (SD) 23.5 (4.6) 24.3 (4.1) 21.8 (5.0)
History of cerebrovascular disease, % 7 3.9 12.9
Cardiovascular disease burden, mean (SD) 0.3 (0.7) 0.2 (0.5) 0.6 (0.9)
Diabetes, % 7.6 6.9 8.9
Hypertension stage 2, % 48.3 40.2 64.4
Smoking, %: currently/ever/never 13/41/46 15/44/41 9/35/56
Obesity, % 13.4 14.4 12.6
Depression, % 3 2 5.0
History of head trauma, % 13.3 14.9 9.9
Number of medications, mean (SD) 3.4 (3.1) 2.8 (2.8) 4.7 (3.3)
Gait speed, mean (SD) 1.15 (0.4) 1.3 (0.3) 0.9 (0.4)
APOE ε4 carrier, % 28.5 30.2 25.2
BDNF met carrier, % 33.5 33.6 33.3
Development of dementia at follow-up, % 14.0 6.0 29.9

Note: N = sample size. Percentage missing values: 0.1% for manufacturing profession, 0.5% for vocabulary, 0.1% for hypertension, 0.6% for smoking, 1.3% for obesity, 1.4% for gait speed, 1.4% for APOE, and 4.0% for BDNF.