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Table 2 Genotype frequencies of two polymorphisms in cumulative data according to hearing impairment status.

From: Hearing impairment risk and interaction of folate metabolism related gene polymorphisms in an aging study

MTR

MTHFR

Hearing impairment

No hearing impairment

A2756G

C677T

N

%

N

%

 

CC

317

25.7

915

74.3

AA

CT

354

21.4

1297

78.6

 

TT

77

15.8

410

84.2

 

CC

137

21.5

501

78.5

AG

CT

184

24.6

564

75.4

 

TT

69

30.1

160

69.9

 

CC

16

25.4

47

74.6

GG

CT

10

13.2

66

86.8

 

TT

16

37.2

27

62.8

Total N

1180

22.8

3987

77.2

  1. N = 5167