Table 1 Characteristics of the participants included in the present study compared to those from the whole baseline sample of the Brazilian Longitudinal Study of Aging (ELSI), 2015–16.

Mean age, years

62.6

61.7, 63.6

62.9

62.1, 63.8

Women

53

49, 57

54

51, 57

Living alone

7.8

6.4, 9.5

9.0

8.1, 10

Race/ethnicity

Black

9.6

6.7, 14

9.7

7.9, 12

White

44

36, 52

43

37, 48

Brown

44

38, 49

45

40, 49

Yellow/indigenous

2.5

1.4, 4.4

2.9

2.3, 3.7

Geographic region

North

3.5

1.2, 9.4

5.6

2.3, 13

Northeast

27

16, 44

24

16, 35

Center-West

7.5

2.3, 22

6.6

3.0, 14

Southeast

43

27, 60

47

36, 59

South

19

7.3, 41

17

8.8, 29

Urban residence

89

80, 93

85

79, 89

Educational level (< 4 years)

31

27, 36

33

29, 36

Daily consumption of fish per week

Less than once

56

48, 63

55

51, 60

Once

21

18, 26

22

20, 24

Twice

12

10, 15

13

11, 15

Three times or more

11

7, 17

9.8

7.5, 13

Current smokers

16

14, 19

16

14, 17

Physical activity (≥ 150 min per week)

68

62, 73

68

66, 70

Obesity (≥ 30 kg/m²)

33

30, 35

30

28, 31

Basic activities of daily living disability

18

15, 22

16

15, 18

Blood collection in the spring/summer

70

56, 80

–

–

No. of participants (unweighted)_

2.264

9.412