Table 2 The relationship between the prevalence of caries and alcohol consumption (results of the multivariate logistic regression analyses)

 Never/ rarely

ref.

ref.

ref.

ref.

 Sometimes

0.72 (0.44, 1.18)

0.74 (0.42, 1.29)

0.285

0.87 (0.57, 1.33)

0.83 (0.51, 1.36)

0.458

 Often

0.42 (0.22, 0.80)

0.54 (0.26, 1.13)

0.103

0.47 (0.26, 0.85)

0.47 (0.24, 0.93)

0.030

 Male

ref.

ref.

ref.

ref.

 Female

1.67 (1.11, 2.51)

1.08 (0.61, 1.93)

0.786

0.99 (0.70, 1.38)

0.62 (0.38, 1.01)

0.055

 55–64 years

ref.

ref.

ref.

ref.

 65–74 years

1.29 (0.86, 1.93)

1.08 (0.69, 1.70)

0.724

1.17 (0.84, 1.64)

0.93 (0.64, 1.36)

0.718

 Urban

ref.

ref.

ref.

ref.

 Rural

0.81 (0.54, 1.21)

1.06 (0.63, 1.77)

0.828

1.58 (1.13, 2.21)

1.53 (0.98, 2.37)

0.059

  ≤ 6 years

ref.

ref.

ref.

ref.

  > 6, ≤ 9 years

0.80 (0.49, 1.31)

0.98 (0.56, 1.73)

0.953

0.90 (0.59, 1.36)

0.97 (0.60, 1.57)

0.894

  > 9 years

0.65 (0.39, 1.09)

0.63 (0.35, 1.14)

0.127

0.45 (0.29, 0.71)

0.45 (0.27, 0.76)

0.002

 Never/ rarely

ref.

ref.

ref.

ref.

 Often

1.87 (1.06, 3.31)

1.85 (1.00, 3.40)

0.049

1.13 (0.74, 1.72)

1.55 (0.96, 2.49)

0.073

 Never smoked

ref.

ref.

ref.

ref.

  ≤ 10 /day

0.46 (0.23, 0.90)

0.56 (0.26, 1.25)

0.157

0.96 (0.51, 1.82)

0.82 (0.39, 1.71)

0.599

  > 10 /day

0.54 (0.33, 0.86)

0.66 (0.35, 1.26)

0.206

0.83 (0.55, 1.26)

0.62 (0.35, 1.11)

0.108

 Low

ref.

ref.

ref.

ref.

 Medium

1.14 (0.67, 1.91)

1.13 (0.65, 1.97)

0.659

1.11 (0.70, 1.74)

1.22 (0.76, 1.98)

0.415

 High

1.38 (0.73, 2.62)

1.41 (0.67, 2.97)

0.363

0.73 (0.43, 1.24)

1.00 (0.54, 1.84)

0.992