Skip to main content

Table 2 Prevalence of primary dental caries and mean dmft value by age and sex

From: Dental caries is negatively correlated with body mass index among 7-9 years old children in Guangzhou, China

Age(y) Dental caries N(%) dmft (mean ± SD)
Boys Girls P a Overall Boys Girls P b Overall
7 1934 (32.8) 1514 (31.4) 0.112 3448(32.2) 1.21 ± 2.38 1.10 ± 2.18 0.0667 1.16 ± 2.29
8 1910(32.1) 1583(31.3) 0.334 3493(31.8) 1.05 ± 2.00 1.00 ± 1.97 0.219 1.03 ± 1.97
9 1715(29.3) 1296(26.5) 0.0011 3011(28.0) 0.84 ± 1.69 0.71 ± 1.51 <0.001 0.78 ± 1.61
Overall 5559(31.4) 5982(29.7) <0.001 9952(30.7) 1.03 ± 2.05 0.93 ± 1.92 <0.001 0.99 ± 1.99
P c <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 <0.0001
  1. dmft : the number of decayed (d), missed (m), and filled (f) teeth(t) for primary teeth
  2. SD: standard deviation
  3. aanalyzed by Chi-Square test
  4. banalyzed by Mann-Whitney U test
  5. cP for dental caries was analyzed by Chi-Square test, and P for dmft was analyzed by Kruskal-Wallis Test