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Table 4 Summary of different comparative results of rs3758539 polymorphism

From: Serum level and polymorphisms of retinol-binding protein-4 and risk for gestational diabetes mellitus: a meta-analysis

Genetic model

No of case

No of control

OR (95 % CI)

Z

p value

I2%

Phet

Effect model

Dominant

GG versus GA + AA

1012

1605

1.133 [0.695–1.846]

0.50

0.617

65.2

0.022

R

Recessive

GG + GA versus AA

893

1473

1.123 [0.508–2.483]

0.29

0.775

8.3

0.336

F

Additive

GG versus AA

893

1473

1.124 [0.505–2.502]

0.29

0.775

0.9

0.365

F

Allele

G versus A

912

1505

1.093 [0.687–1.739]

0.37

0.709

68.3

0.024

R

  1. P het = p value for heterogeneity, OR = adds ratio, CI = confidence interval, F = fixed-effect model, R = random-effect model