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
Back to article page

BMC Public Health

ISSN: 1471-2458

Contact us