Table 1 Demographics at time of actigraphy collection

Age at baseline

62.0 ± 7.8

Female N (%)

46,683 (56)

College or university degree N (%)

35,548 (43)

General health [1–4]

2.0 ± 0.7

Body mass index

26.7 ± 4.5

Townsend deprivation index

− 1.7 ± 2.8

Follow-up (years)

6.8 ± 0.9

Symbol Digit Substitution score

20.4 ± 4.9

Trail Making Test A duration (seconds)

38.0 ± 13.7

Trail Making Test B-A (seconds)

25.5 ± 17.9

Numeric Memory score

7.04 ± 1.43

Fluid Intelligence score

6.68 ± 2.03

Interdaily stability (IS)

0.54 ± 0.12

Intradaily variability (IV)

0.91 ± 0.24

Least active 5 h (L5)

3.28 ± 6.41

Most active 10 h (M10)

47.4 ± 17.1

Amplitude

24.4 ± 9.42

Mesor

28.2 ± 11.7