Table 3 Prevalence of primary dental caries and mean dmft values in each BMI subgroup based on the criteria in China

 Normal weight

11354(64.2)

3693(32.5)

1.08 ± 2.09

 Underweight

2717(15.4)

928(34.2)

1.20 ± 2.27

 Overweight

2064(11.7)

560(27.1)

0.81 ± 1.73

 Obesity

1548(8.8)

378(24.4)

0.68 ± 1.52

 P^a

—

<0.0001

<0.0001

 Normal weight

10514(71.1)

3204(30.5)

0.96 ± 1.93

 Underweight

2565(17.4)

782(30.5)

0.99 ± 2.04

 Overweight

1128(7.6)

272(24.1)

0.67 ± 1.57

 Obesity

571(3.9)

135(23.6)

0.64 ± 1.47

 P^a

—

<0.0001

<0.0001

 Normal weight

21868(67.4)

6897(31.5)

1.02 ± 2.01

 Underweight

5282(16.3)

1710(32.4)

1.10 ± 2.17

 Overweight

3192(9.8)

832(26.1)

0.76 ± 1.67

 Obesity

2119(6.5)

513(24.2)

0.67 ± 1.51

 P^a

—

<0.0001

<0.0001