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Table 2 Proportion of the mitochondrial clusters and haplogroups in the Normative Aging Study (NAS) cohort participants (N = 582)

From: Mitochondrial haplogroups modify the effect of black carbon on age-related cognitive impairment

Haplotypes

N

%

Cluster 1 (J or T)

108

19

  Haplogroup J

50

9

  Haplogroup T

58

10

Cluster 2 (H or V)

296

51

  Haplogroup H

51

9

  Haplogroup V

245

42

Cluster 3 (K or U)

116

20

  Haplogroup K

55

10

  Haplogroup U

61

10

Cluster 4 (I, W or X)

62

10

  Haplogroup I

32

5

  Haplogroup W

8

1

  Haplogroup X

22

4