Table 5 Characteristics and data completion for the first 48,000 participants who attended the imaging enhancement.

Characteristic

 Age, mean (SD)

64 (7.5)

55. (7.6)

56. (8.1)

 Females

52

52

55

 Professional qualifications

74

73

58

 Non-white ethnic background

3

3

6

 BMI ≥ 30 kg/m²

19

18

25

 Current smoker

3

6

11

Completed following enhancements

 Physical activity monitor

    44

18

 Online questionnaires

  24 h dietary recall at least once

    60

32

  Cognitive function

    54

22

  Occupational history

    55

21

  Mental health

    69

27

  Digestive health

    77

30

 Repeat of baseline assessment during 2011–2012 (not imaging)

    17

3