Table 4 Multiple regression analysis of factors influencing on the number of teeth

 Osteopenia

−3.23(0.38)

<0.01

−0.70(0.42)

0.10

 Osteoporosis

−8.88(0.45)

<0.01

−1.54(0.60)

<0.05

Menarche age (years)

−0.88(0.14)

<0.01

−0.02(0.13)

0.90

Duration of menopause (years)

−0.45(0.02)

<0.01

−0.16(0.05)

<0.01

Number of pregnancies

−0.84(0.09)

<0.01

0.14(0.12)

0.21

Age at first child’s birth (years)

0.69(0.06)

<0.01

0.19(0.07)

<0.01

Duration of taking oral contraceptives (months)

0.000(0.000)

0.67

0.02(0.02)

0.15

Duration of taking female hormone drugs (years)

−0.000(0.000)

0.20

0.03(0.007)

<0.01

Calcium intake

0.003(0.001)

<0.01

0.001(0.000)

<0.01

Age (years)

−0.57(0.02)

<0.01

−0.31(0.06)

<0.01

 Middle-low

0.91(0.50)

0.07

1.29(0.64)

0.05

 Middle-high

0.77(0.56)

0.17

0.87(0.66)

0.18

 High

2.25(0.51)

<0.01

2.12(0.63)

<0.01

 Less than middle school

6.29(0.44)

<0.01

1.58(0.57)

<0.01

 Less than high school

6.82(0.46)

<0.01

1.42(0.68)

<0.05

 Graduate of college or higher

8.31(0.45)

<0.01

2.54(0.75)

<0.01