Table 3.
Prevalence of primary dental caries and mean dmft values in each BMI subgroup based on the criteria in China
| BMI Groups | N (%) | Primary dental caries N(%) | dmft (Mean ± SD) |
|---|---|---|---|
| Boys | |||
| 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 |
| Girls | |||
| 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 |
| Total | |||
| 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 |
dmft : the number of decayed (d), missed (m) and filled (f) teeth(t) for primary dentition
BMI: body mass index; SD: standard deviation
a: P for dental caries was analyzed by Chi-Square test, and P for dmft was analyzed by Kruskal-Wallis Test