Table 3 Results of pooled analysis of each polymorphism based on five genetic models

LTF rs1126478 (n = 4)

0.98 (0.87, 1.10), 0.68, 25, 0.26

1.03 (0.80, 1.33), 0.82, 4, 0.37

1.00 (0.80, 1.25), 0.99, 4, 0.44

0.99 (0.81, 1.23), 0.96, 7, 0.36

0.95 (0.80, 1.13), 0.58, 0, 0.45

ENAM rs1264848 (n = 5)

0.93 (0.65, 1.32), 0.68, 75, 0.003

0.88 (0.34, 2.30), 0.79, 76, 0.002

1.21 (0.88, 1.65), 0.24, 0, 0.48

1.24 (0.93, 1.67), 0.15, 24, 0.26

0.83 (0.44, 1.58), 0.58, 79, 0.0007

ENAM rs3796704 (n = 4)

1.38 (1.08, 1.76), 0.009, 27, 0.25

1.86 (0.96, 3.62), 0.07, 44, 0.17

1.27 (0.64, 2.52), 0.49, 50, 0.13

1.64 (0.86, 3.14), 0.13, 43, 0.17

1.41 (1.06, 1.87), 0.02, 18, 0.30

Polymorphism, (number of studies)

T vs. C

TT vs. CC

CT vs. CC

CT + TT vs. CC

TT vs. CC + CT

OR (95%CI), P-value, I² (%), P_h

OR (95%CI), P-value, I² (%), P_h

OR (95%CI), P-value, I² (%), P_h

OR (95%CI), P-value, I² (%), P_h

OR (95%CI), P-value, I² (%), P_h

ENAM rs3796703 (n = 2)

0.92 (0.24, 3.58), 0.91, 78, 0.03

5.22 (0.25, 108.96), 0.29

0.89 (0.23, 3.48), 0.87, 77, 0.04

0.90 (0.23, 3.63), 0.89, 78, 0.03

2.90 (0.92, 9.12), 0.07, 0, 0.69

AMELX rs946252 (n = 3)

1.01 (0.68, 1.51), 0.95, 39, 0.20

1.27 (0.58, 2.75), 0.55, 0, 0.51

1.45 (0.75, 2.81), 0.27, 31, 0.23

1.21 (0.68, 2.14), 0.52, 0, 0.51

0.82 (0.43, 1.56), 0.54, 0.38, 0.20

AMELX rs17878486 (n = 4)

2.25 (0.81, 6.24), 0.12, 86, 0.0001

3.59 (0.55, 23.32), 0.18, 81, 0.001

1.45 (0.36, 5.80), 0.60, 0.67, 0.03

2.30 (0.51, 10.33), 0.28, 77, 0.004

3.10 (0.85, 11.28), 0.09, 81, 0.001

AMELX rs6639060 (n = 2)

1.08 (0.63, 1.85), 0.78

1.04 (0.43, 2.51), 0.94

1.27 (0.49, 3.30), 0.63

1.14 (0.56, 2.29), 0.72

1.00 (0.42, 2.39), 1.00

AMELX rs2106416 (n = 3)

0.59 (0.16, 2.11), 0.41, 82, 0.003

1.83 (0.47, 7.06), 0.38, 40, 0.20

0.55 (0.13, 2.25), 0.40, 80, 0.006

0.59 (0.15, 2.31), 0.45, 79, 0.008

1.67 (0.44, 6.34), 0.45, 31, 0.23