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Table 4 Difference in cognitive score between ε4 heterozygotes and homozygotes compared to non-ε4 carriers at ages 45 to 85 years

From: The association of APOE ε4 with cognitive function over the adult life course and incidence of dementia: 20 years follow-up of the Whitehall II study

 

Difference in standardized global cognitive score

Difference in standardized memory score

Difference in standardized reasoning score

Difference in standardized semantic fluency score

Difference in standardized phonemic fluency score

Age

β (95% CI)a

p value

β (95% CI)a

p value

β (95% CI)a

p value

β (95% CI)a

p value

β (95% CI)a

p value

ε4 heterozygotes vs non ε4 carriers

 45

0.11 (0.02, 0.20)

0.01

0.02 (− 0.13, 0.17)

0.83

0.13 (0.03, 0.22)

0.01

− 0.00 (− 0.13, 0.13)

0.99

0.15 (0.02, 0.28)

0.02

 50

0.08 (0.02, 0.13)

0.005

0.03 (− 0.05, 0.10)

0.44

0.09 (0.03, 0.14)

0.003

0.01 (− 0.06, 0.07)

0.84

0.10 (0.03, 0.17)

0.003

 55

0.06 (0.01, 0.10)

0.02

0.03 (− 0.02, 0.09)

0.26

0.06 (0.01, 0.11)

0.02

0.01 (− 0.04, 0.06)

0.69

0.06 (0.00, 0.11)

0.04

 60

0.03 (− 0.01, 0.08)

0.10

0.02 (− 0.02, 0.07)

0.33

0.04 (− 0.01, 0.09)

0.09

0.01 (− 0.04, 0.06)

0.70

0.02 (− 0.03, 0.07)

0.36

 65

0.01 (− 0.02, 0.05)

0.47

0.00 (− 0.04, 0.05)

0.84

0.03 (− 0.02, 0.08)

0.31

0.00 (− 0.04, 0.05)

0.95

0.00 (− 0.04, 0.05)

0.89

 70

− 0.01 (− 0.05, 0.03)

0.57

− 0.03 (− 0.08, 0.02)

0.23

0.00 (− 0.05, 0.05)

0.97

− 0.01 (− 0.06, 0.03)

0.54

− 0.00 (− 0.05, 0.05)

0.91

 75

− 0.04 (− 0.08, − 0.00)

0.04

− 0.08 (− 0.14, − 0.02)

0.007

− 0.04 (− 0.10, 0.02)

0.19

− 0.04 (− 0.10, 0.01)

0.13

0.01 (− 0.05, 0.11)

0.84

 80

− 0.08 (− 0.14, − 0.03)

0.002

− 0.15 (− 0.23, − 0.06)

0.001

− 0.10 (− 0.18, − 0.03)

0.006

− 0.08 (− 0.16, − 0.00)

0.04

0.03 (− 0.05, 0.11)

0.44

 85

− 0.14 (− 0.24, − 0.04)

0.006

− 0.23 (− 0.40, − 0.07)

0.006

− 0.20 (− 0.33, − 0.07)

0.002

− 0.13 (− 0.28, 0.02)

0.09

0.08 (− 0.08, 0.23)

0.34

ε4 homozygotes vs non ε4 carriers

 45

− 0.17 (− 0.41, 0.08)

0.18

− 0.12 (− 0.52, 0.29)

0.56

− 0.06 (− 0.32, 0.20)

0.68

0.05 (− 0.29, 0.39)

0.78

− 0.29 (− 0.63, 0.06)

0.11

 50

− 0.11 (− 0.27, 0.05)

0.18

− 0.05 (− 0.26, 0.15)

0.62

− 0.05 (− 0.21, 0.11)

0.52

0.01 (− 0.18, 0.19)

0.95

− 0.13 (− 0.32, 0.06)

0.17

 55

− 0.08 (− 0.21, 0.05)

0.24

− 0.04 (− 0.21, 0.12)

0.59

− 0.06 (− 0.21, 0.09)

0.43

− 0.04 (− 0.19, 0.11)

0.63

− 0.04 (− 0.20, 0.12)

0.61

 60

− 0.08 (− 0.19, 0.04)

0.19

− 0.08 (− 0.22, 0.06)

0.28

− 0.08 (− 0.22, 0.06)

0.27

− 0.09 (− 0.22, 0.05)

0.22

− 0.01 (− 0.15, 0.14)

0.91

 65

− 0.11 (− 0.21, 0.00)

0.05

− 0.14 (− 0.27, − 0.01)

0.03

− 0.12 (− 0.27, 0.02)

0.09

− 0.14 (− 0.27, − 0.01)

0.03

− 0.02 (− 0.16, 0.12)

0.76

 70

− 0.17 (− 0.27, − 0.06)

0.003

− 0.22 (− 0.36, − 0.07)

0.003

− 0.20 (− 0.35, − 0.04)

0.01

− 0.21 (− 0.35, − 0.07)

0.003

− 0.07 (− 0.22, 0.08)

0.33

 75

− 0.25 (− 0.37, − 0.14)

< 0.001

− 0.29 (− 0.46, − 0.11)

0.001

− 0.31 (− 0.48, − 0.14)

< 0.001

− 0.30 (− 0.46, − 0.14)

< 0.001

− 0.16 (− 0.33, 0.01)

0.07

 80

− 0.37 (− 0.54, − 0.21)

< 0.001

− 0.34 (− 0.60, − 0.08)

0.009

− 0.46 (− 0.68, − 0.24)

< 0.001

− 0.41 (− 0.64, − 0.18)

0.001

− 0.26 (− 0.50, − 0.02)

0.04

 85

− 0.53 (− 0.82, − 0.23)

0.001

− 0.36 (− 0.86, 0.13)

0.15

− 0.66 (− 1.04, − 0.28)

0.001

− 0.54 (− 0.99, − 0.09)

0.019

− 0.37 (− 0.83, 0.10)

0.12

  1. aAnalysis undertaken using joint models (the linear mixed submodel using age as time scale (age, age2, and age3) is adjusted for sex, marital status, education level, and occupation and their interaction with time terms if significant)