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Table 1 Distribution of subjects by sex, ethnicity, and history of tobacco use

From: Macular pigment optical density in a Brazilian sample

Variable

Frequency (n = 103)

%

Sex

Female

66

64.1

Male

37

35.9

Ethnicity

White

30

29.1

Black

25

24.3

Biracial

48

46.6

Tobacco use

Yes

22

21.3

No

81

78.7