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Table 1 Dataset used. Number and characteristics of the 2014 individuals included in this analysis, by clinical diagnosis at baseline

From: The dynamics of biomarkers across the clinical spectrum of Alzheimer’s disease

 

Clinical state at baseline

CN

MCI

ADem

Number of individuals

 Total

749

910

355

 Chronological age at baseline (years)

≤ 70

241

308

85

70 < age < 80

402

423

170

> 80

106

179

100

 Gender

Women

413

370

157

Men

336

540

198

 Years of education

≤ 16

385

537

247

> 16

364

373

108

 Genetic background (APOE ε4)

Non-carriers of ε4 allele

370

420

114

Carriers of 1 ε4 allele

135

337

159

Carriers of 2 ε4 alleles

12

92

65

Other characteristics (standard deviation of the mean in brackets)

 Average age at baseline (years)

73.20 (6.17)

73.04 (7.62)

75.03 (7.88)

 Average number of years of education

16.55 (2.57)

15.93 (2.82)

15.24 (2.99)

 Average time between visits (years)

1.02 (0.58)

0.8 (0.38)

0.64 (0.27)

 Average follow-up (years)

3.36 (3.43)

3.69 (2.62)

1.38 (0.85)