Table 2 Summary of pooled effect sizes of ABCG2 and SLC2A9 polymorphisms on serum urate

   MD₁ (AA versus CC)

5

63.1

18.41

8.68, 28.14

0.605

0.284, 0.956

4

68.7

50.43

32.66, 68.20

0.411

0.197, 0.783

   MD₂ (CA versus CC)

5

59.1

11.49

4.10, 18.89

4

0.0

19.46

14.19, 24.73

   MD₁ (CC versus TT)

6

67.9

−21.47

−30.97, −11.96

0.381

0.088, 0.856

3

86.9

−32.33

−52.61,-12.05

0.420

0.087, 0.932

   MD₂ (TC versus TT)

6

65.7

−8.16

−16.63, 0.31

3

75.1

−9.87

−25.27,5.54

   MD₁ (CC versus TT)

6

88.5

−49.29

−59.85, −38.74

0.375

0.239, 0.622

   MD₂ (TC versus TT)

6

26.0

−20.43

−28.91, −11.94

   MD₁ (GG versus AA)

6

0.0

−51.23

−57.22, −45.25

0.399

0.316, 0.488

   MD₂ (AG versus AA)

6

0.0

−20.65

−23.83, −17.47

   MD₁ (GG versus AA)

6

−54.30

−58.78, − 49.82

0.326

0.280, 0.426

   MD₂ (AG versus AA)

6

−18.34

−22.68, −13.99

   MD₁ (GG versus TT)

3

−29.29

−63.90, 5.33

0.592

0.152, 0.969

   MD₂ (TG versus TT)

3

−20.68

−47.08, 5.71