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

From: Dental caries is negatively correlated with body mass index among 7-9 years old children in Guangzhou, 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
Pa <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
Pa <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
Pa <0.0001 <0.0001
  1. dmft : the number of decayed (d), missed (m) and filled (f) teeth(t) for primary dentition
  2. BMI: body mass index; SD: standard deviation
  3. a: P for dental caries was analyzed by Chi-Square test, and P for dmft was analyzed by Kruskal-Wallis Test