Table 2 Objective machine-learned measures of physical activity (vector magnitude), sleep, walking, sitting-or-standing, bicycling, vehicle, and mixed activity time: the UK Biobank study 2013–2015 (n = 96,220).

From: Statistical machine learning of sleep and physical activity phenotypes from sensor data in 96,220 UK Biobank participants

Individuals

Physical activity

MET

Sleep

Walking

Sit/stand

Bicycling

Vehicle

Mixed

 

[n]

[mg]

[MET hrs/day]

[% time]

Age

 

[mean ± stdev]

<55

20,456

31.7 ± 9.1

37.6 ± 3.1

36.2 ± 5.0

5.5 ± 3.0

35.7 ± 7.8

0.4 ± 1.0

5.3 ± 3.4

17.0 ± 7.2

55–64

33,746

29.4 ± 8.2

37.1 ± 3.0

36.7 ± 5.1

5.5 ± 3.0

35.4 ± 7.6

0.3 ± 0.8

5.1 ± 3.2

17.1 ± 6.9

65+

42,018

26.3 ± 7.3

36.3 ± 2.9

37.3 ± 5.4

5.1 ± 3.0

36.1 ± 7.5

0.2 ± 0.6

4.5 ± 2.8

16.9 ± 6.7

p valuea

 

<1 × 10−300

<1 × 10−300

5 × 10−148

3 × 10−93

2 × 10−31

2 × 10−146

7 × 10−270

2 × 10−04

Cohen’s d

 

0.66

0.43

0.21

0.13

0.08

0.20

0.27

0.03

Sex

Women

54,158

29.0 ± 8.0

37.1 ± 2.9

36.9 ± 4.9

4.8 ± 2.7

34.6 ± 7.2

0.2 ± 0.6

4.6 ± 2.8

18.9 ± 6.7

Men

42,062

28.0 ± 8.7

36.5 ± 3.2

36.7 ± 5.6

5.9 ± 3.3

37.3 ± 7.8

0.4 ± 1.0

5.2 ± 3.4

14.5 ± 6.4

p valuea

 

5 × 10−33

1 × 10−197

3 × 10−17

<1 × 10−300

<1 × 10−300

<1 × 10−300

1 × 10−248

<1 × 10−300

Cohen’s d

 

0.11

0.21

0.04

0.37

0.37

0.25

0.20

0.68

Self-rated health

Excellent

21,101

30.8 ± 8.9

37.4 ± 2.9

36.5 ± 4.8

5.6 ± 3.0

35.0 ± 7.2

0.4 ± 1.0

5.0 ± 3.0

17.5 ± 6.8

Good

57,792

28.6 ± 8.0

36.9 ± 3.0

36.8 ± 5.1

5.3 ± 3.0

35.5 ± 7.4

0.3 ± 0.7

4.9 ± 3.1

17.2 ± 6.8

Fair

15,313

26.1 ± 7.8

36.0 ± 3.1

37.2 ± 5.8

4.9 ± 3.1

37.1 ± 8.2

0.2 ± 0.6

4.7 ± 3.3

15.9 ± 7.1

Poor

2,707

23.3 ± 7.8

34.9 ± 3.5

37.9 ± 7.1

3.8 ± 3.0

39.2 ± 9.1

0.2 ± 0.6

4.2 ± 3.2

14.6 ± 7.2

p valuea

 

<1 × 10−300

<1 × 10−300

8 × 10−54

2 × 10−271

3 × 10−193

6 × 10−149

1 × 10−33

3 × 10−106

Cohen’s d

 

0.90

0.79

0.24

0.60

0.51

0.27

0.26

0.40

Time of day

0-5.59am

96,220

5.0 ± 3.7

23.9 ± 1.9

92.3 ± 10.0

0.3 ± 1.0

5.7 ± 7.8

0.0 ± 0.2

0.4 ± 1.8

1.3 ± 2.7

6-11.59am

96,220

38.8 ± 15.4

41.3 ± 5.5

29.1 ± 13.5

7.2 ± 5.5

32.7 ± 11.8

0.4 ± 1.4

5.9 ± 4.8

24.6 ± 11.0

12-5.59 pm

96,220

44.4 ± 14.9

45.7 ± 5.4

4.7 ± 6.3

10.1 ± 6.3

49.6 ± 13.4

0.5 ± 1.6

9.1 ± 6.1

26.0 ± 12.9

6-11.59 pm

96,220

26.2 ± 10.9

36.3 ± 4.8

21.2 ± 13.0

3.5 ± 3.3

55.0 ± 12.9

0.2 ± 0.8

4.1 ± 4.4

16.0 ± 8.7

p valueb

 

<1 × 10−300

<1 × 10−300

<1 × 10−300

<1 × 10−300

<1 × 10−300

<1 × 10−300

<1 × 10−300

<1 × 10−300

Cohen’s d

 

3.6

5.4

10.5

2.2

4.6

0.44

1.9

2.6

Day

Weekday

96,220

28.7 ± 8.5

37.0 ± 3.2

36.2 ± 5.5

5.4 ± 3.2

36.2 ± 8.2

0.3 ± 0.8

5.0 ± 3.4

16.9 ± 7.3

Weekend

96,220

28.2 ± 9.9

36.4 ± 3.6

38.3 ± 6.6

5.1 ± 3.7

34.7 ± 8.7

0.3 ± 1.1

4.5 ± 3.9

17.1 ± 7.8

p valueb

 

4 × 10−98

<1 × 10−300

<1 × 10−300

4 × 10−172

<1 × 10−300

0.765

<1 × 10−300

1 × 10−27

Cohen’s d

 

0.05

0.17

0.35

0.09

0.17

0.00

0.15

0.03

Season

Spring

21,839

29.0 ± 8.5

37.0 ± 3.0

36.7 ± 5.1

5.4 ± 3.1

35.6 ± 7.6

0.3 ± 0.8

4.9 ± 3.1

17.0 ± 6.9

Summer

25,273

29.1 ± 8.5

37.0 ± 3.0

36.3 ± 5.1

5.3 ± 3.1

35.7 ± 7.7

0.3 ± 0.9

5.0 ± 3.1

17.4 ± 7.0

Autumn

28,699

28.4 ± 8.2

36.8 ± 3.0

36.8 ± 5.2

5.3 ± 3.0

35.9 ± 7.5

0.3 ± 0.7

4.9 ± 3.1

16.8 ± 6.8

Winter

20,409

27.6 ± 8.0

36.5 ± 3.0

37.5 ± 5.4

5.0 ± 2.9

35.9 ± 7.5

0.2 ± 0.6

4.7 ± 3.0

16.7 ± 6.8

p valuea

 

6 × 10−107

3 × 10−72

3 × 10−136

5 × 10−46

4 × 10−05

1 × 10−77

2 × 10−32

2 × 10−32

Cohen’s d

 

0.18

0.15

0.23

0.14

0.04

0.16

0.11

0.10

  1. aAge, sex, self-rated health, season (Spring starting on 1st March): Two-way analysis of variance test used to compare metrics between groups adjusting for age, sex, ethnicity, area-deprivation, smoking, alcohol, self-rated health and season of wear.
  2. bTime of day, day: Repeated two-way analysis of variance test used to compare metrics within individuals and between groups adjusting for age, sex, ethnicity, area-deprivation, smoking, alcohol, self-rated health, and season of wear.