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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