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Table 2 Genotype distribution of MTHFR, MTRR mutations in the cases and controls according to additive, dominant, and recessive models

From: Association of three missense mutations in the homocysteine-related MTHFR and MTRR gene with risk of polycystic ovary syndrome in Southern Chinese women

Gene & SNP

Model

Genotype

PCOS Group

Control Group

OR (95% CI)

P value

Adjusted ORa (95% CI)

P value

N (%)

N (%)

MTHFR C677T

Additive

CC

67 (44.7%)

157 (52.3%)

1

0.184

1

0.352

CT

68 (45.3%)

109 (36.3%)

1.462 (0.964–2.217)

1.225 (0.790–1.899)

TT

15 (10.0%)

34 (11.3%)

1.034 (0.528–2.023)

0.753 (0.372–1.524)

Dominant

CT + TT

83 (55.3%)

143 (47.7%)

1

0.126

1

0.628

CC

67 (44.7%)

157 (52.3%)

0.735 (0.496–1.090)

0.902 (0.595–1.368)

Recessive

TT

15 (10.0%)

34 (11.3%)

1

0.669

1

0.263

CC + CT

135 (90%)

266 (88.7%)

1.150 (0.605–2.186)

1.467 (0.750–2.870)

MTHFRA1298C

Additive

AA

65 (43.3%)

195 (65.0%)

1

< 0.001

1

< 0.001

AC

63 (42.0%)

91 (30.3%)

2.077 (1.356–3.182)

2.142 (1.376–3.336)

CC

22 (14.7%)

14 (4.7%)

4.714 (2.280–9.748)

3.755 (1.741–8.096)

Dominant

AC + CC

85 (56.7%)

105 (35.0%)

1

< 0.001

1

< 0.001

AA

65 (43.3%)

195 (65.0%)

0.412 (0.276–0.615)

0.422 (0.277–0.641)

Recessive

CC

22 (14.7%)

14 (4.7%)

1

< 0.001

1

0.008

AA + AC

128 (85.3%)

286 (95.3%)

0.285 (0.141–0.575)

0.368 (0.176–0.771)

MTRR A66G

Additive

AA

82 (54.7%)

162 (54.0%)

1

0.014

1

0.028

AG

46 (30.7%)

118 (39.3%)

0.770 (0.500–1.186)

0.694 (0.442–1.088)

GG

22 (14.7%)

20 (6.7%)

2.173 (1.122–4.210)

1.796 (0.902–3.572)

Dominant

AG + GG

68 (45.3%)

138 (46.0%)

1

0.894

1

0.475

AA

82 (54.7%)

162 (54.0%)

1.027 (0.693–1.523)

1.162 (0.770–1.753)

Recessive

GG

22 (14.7%)

20 (6.7%)

1

0.007

1

0.031

AA + AG

128 (85.3%)

280 (93.3%)

0.416 (0.219–0.789)

0.481 (0.247–0.935)

  1. OR odds ratio, CI confidence intervals
  2. a Adjusted for potential confounders, including age, body mass index, folate, history of smoking, drinking, and hypertensive family history
  3. Bold values indicate significance after Bonferroni correction for multiple comparisons (P < 0.016, namely 0.05/3 for three SNPs)