Table 1 Demographic data of SCD cases and non-SCD controls

Blood Center Affiliation

n

column%

n

column%

 Hemope

50

32.9

50

32.4

 Hemorio

39

25.7

46

29.9

 Hemominas

63

41.4

58

37.7

 Male

73

48.0

68

44.2

 Female

79

52.0

86

55.8

 Never attended

2

1.3

0

0.0

 Elementary/ Middle School

124

81.6

122

79.2

 Adult Literacy/Technical school

8

5.3

14

9.1

 Bachelors/Masters/Doctorate

18

11.8

18

11.7

 White

16

10.5

37

24.0

 Black

53

34.8

26

16.9

 Indigenous (Indian)

1

0.7

1

0.6

 Mixed

79

52.0

84

54.6

 Unknown

1

0.7

0

0.0

 Other

2

1.3

6

3.9

 18 to < 25 years

32

21.0

27

17.6

 25 to < 35 years

49

32.2

44

28.8

 35 to < 45 years

45

29.6

51

33.3

 45 to < 55 years

19

12.5

24

15.7

 > 55 years

7

4.6

7

4.6

 Single

75

49.3

56

36.4

 Married

40

26.3

58

37.7

 Divorced/ Widowed

12

7.9

13

8.4

 Living together

25

16.5

27

17.5

 Never worked / No occupation

43

28.3

12

7.8

 Currently working

109

71.7

142

92.2

 < R$1400

106

69.7

97

63

 R$1401- R$6000

43

28.3

51

33

 > R$6000

3

2.0

5

3.3

 Don’t know

0

0.0

1

0.7