Table 2 Main data of all studies included in the meta-analysis for the -46G/A (Arg16Gly) polymorphism in β2-AR gene

Chan, I H[16]

Hong Kong

2008

10.4 ± 3.7

101

135

59

51

89

33

1.06

0.66-1.70

Cui, LY(Han)[17]

Neimenggu

2007

21-62

6

34

2

6

20

4

0.33

0.06-1.90

Cui, LY(Meng)[17]

Neimenggu

2007

26-69

3

21

6

6

19

5

1.25

0.34-4.64

Gao, J M[18]

Beijing

2004

38.7 ± 13.8

38

59

28

35

53

8

3.18

1.37-7.33

Li, H[19]

Shanghai

2009

3-12

86

76

30

46

100

46

0.59

0.35-0.98

Liao, W[20]

Chongqing

2001

5.8 ± 4.3

12

27

11

14

28

8

1.48

0.54-4.06

Qiu, Y Y(2008)[21]

Jiangsu

2008

63.2 ± 5.6

25

31

14

34

55

23

0.97

0.46-2.04

Shi, X H[22]

Jiangsu

2008

34(14-66)

22

19

7

10

25

13

0.46

0.17-1.28

Wang, Z[23]

Anhui

2001

30.6 ± 16.2

52

54

22

38

64

34

0.62

0.34-1.14

Xie, Y[24]

Shanghai

2008

4.98 ± 2.78

14

37

6

21

34

7

0.92

0.29-2.93

Xing, J[25]

Beijing

2001

20-66

9

62

29

29

55

16

2.14

1.08-4.26

Zhang, X Y[26]

Chongqing

2008

1.08-17

81

111

25

19

23

8

0.68

0.29-1.62

Wang, J Y[27]

Taiwan

2009

7.82 ± 3.81

138

207

97

173

250

87

1.37

0.99-1.89