Table 6 Indicators of dental caries by dental care type: mean, standard deviation (SD) and 95% confidence intervals at 15-year-old group

Caries-free teeth^a

Mean ± SD

26.90 ± 0.13

26.06 ± 0.10

< 0.0001

95% CI

[26.65–27.15]

[25.86–26.23]

Decayed teeth^a

Mean ± SD

0.13 ± 0.04

0.14 ± 0.02

0.8320

95% CI

[0.06–0.21]

[0.10–0.17]

Missing teeth^a

Mean ± SD

0.13 ± 0.05

0.25 ± 0.04

0.0503

95% CI

[0.03–0.23]

[0.18–0.33]

Filled teeth^a

Mean ± SD

0.74 ± 0.10

1.36 ± 0.08

< 0.0001

95% CI

[0.53–0.94]

[1.21–1.52]

Caries-free temporary teeth

Mean ± SD

0.05 ± 0.02

0.06 ± 0.02

0.6097

95% CI

[0–0.09]

[0.03–0.09]

Decayed temporary teeth

Mean ± SD

0.01 ± 0.01

0.01 ± 0.00

0.7848

95% CI

[0–0.01]

[0–0.01]

Filled temporary teeth

Mean ± SD

0 ± 0

0 ± 0

0.0458

95% CI

[0–0]

[0–0.01]

Caries-free permanent teeth

Mean ± SD

26.86 ± 0.13

25.99 ± 0.10

< 0.0001

95% CI

[26.60–27.11]

[25.80–26.17]

Decayed permanent teeth

Mean ± SD

0.13 ± 0.04

0.14 ± 0.02

0.8563

95% CI

[0.06–0.20]

[0.10–0.18]

Missing permanent teeth

Mean ± SD

0.01 ± 0.01

0.02 ± 0.01

0.5073

95% CI

[0–0.02]

[0–0.04]

Filled permanent teeth

Mean ± SD

0.74 ± 0.10

1.35 ± 0.08

< 0.0001

95% CI

[0.53–0.94]

[1.20–1.51]

DMFT/dmft^b

Mean ± SD

0.88 ± 0.11

1.52 ± 0.09

< 0.0001

95% CI

[0.68–1.09]

[1.36–1.69]

DMFT^c

Mean ± SD

0.88 ± 0.11

1.51 ± 0.08

< 0.0001

95% CI

[0.66–1.09]

[1.34–1.67]