Table 3 The effect of SNP genotypes on beverage and total caffeine intake

rs2470893 A > G

GG (N = 415)

1.40 (1.19)

0.34 (0.63)

201.25 (156.68)

*GA + AA (N = 105)

1.70 (1.17)

0.16 (0.31)

199.62 (116.55)

p

0.025

0.006

0.92

OR (95% CI)

1.33 (1.03–1.72)

0.83 (0.73–0.94)

–

η²_p

0.010

0.015

–

p^a

0.001

0.001

–

OR (95% CI)

1.46 (1.16–1.86)

0.80 (0.71–0.97)

–

η²_p

0.022

0.024

–

rs2472297 C > T

CC (N = 475)

1.46 (1.21)

0.31 (0.60)

201.26 (152.86)

*CT + TT (N = 45)

1.53 (0.96)

0.25 (0.41)

197.33 (106.52)

p

0.70

0.49

0.86

rs762551 A > C

AA (N = 236)

1.49 (1.14)

0.23 (0.49)

191.30 (134.72)

*AC + CC (N = 284)

1.47 (1.24)

0.31 (0.60)

202.56 (162.21)

p

0.81

0.11

0.41

rs762551 A > C

AA + AC (N = 476)

1.43 (1.16)

0.28 (0.59)

193.65 (149.22)

*CC (N = 44)

2.16 (1.45)

0.21 (0.37)

253.93 (158.24)

p

0.001

0.49

0.033

OR (95% CI)

2.06 (1.33–3.21)

–

6.68 (5.16–115.58)

η²_p

0.022

–

0.010

p^a

0.083

–

0.55

OR (95% CI)

–

–

–

η²_p

–

–

–