Prevalence and caries-related risk factors in schoolchildren of 12- and 15-year-old: a cross-sectional study

BMC Oral Health

Table 2 Indicators of dental caries by age group: mean, standard deviation (SD) and 95% confidence intervals, by age group

Indicator		Age 12 years	Age 15 years	p-value
Caries-free teeth^a	Mean ± SD	25.48 ± 2.42	26.23 ± 2.12	< 0.0001
Caries-free teeth^a	95% CI	[25.44–25.52]	[26.18–26.29]	< 0.0001
Decayed teeth^a	Mean ± SD	0.22 ± 0.75	0.15 ± 0.52	0.0252
Decayed teeth^a	95% CI	[0.21–0.23]	[0.13–0.16]	0.0252
Missing teeth^a	Mean ± SD	0.05 ± 0.32	0.22 ± 0.80	< 0.0001
Missing teeth^a	95% CI	[0.04–0.05]	[0.20–0.24]	< 0.0001
Filled teeth^a	Mean ± SD	0.66 ± 1.19	1.22 ± 1.75	< 0.0001
Filled teeth^a	95% CI	[0.64–0.68]	[1.17–1.26]	< 0.0001
DMFT/dmft Index^b	Mean ± SD	0.89 ± 1.46	1.38 ± 1.87	< 0.0001
DMFT/dmft Index^b	95% CI	[0.87–0.91]	[1.33–1.43]	< 0.0001
SiC Index^c	Mean ± SD	2.46 ± 1.56	3.44 ± 1.75	< 0.0001
SiC Index^c	95% CI	[2.42–2.50]	[3.37–3.52]	< 0.0001
Restoration Index (%)^d	Mean ± SD	73.29 ± 39.42	87.13 ± 29.98	< 0.0001
Restoration Index (%)^d	95% CI	[72.36–74.23]	[86.03–88.24]	< 0.0001
Proportion of affectation (%)^e	Mean ± SD	3.42 ± 5.64	5.01 ± 6.79	< 0.0001
Proportion of affectation (%)^e	95% CI	[3.34–3.50]	[4.83–5.19]	< 0.0001

Statistical evaluation using the Student’s t-test for the difference of means by age group
^aTotal number (temporary + permanent) of caries-free, decayed, missing and filled teeth
^bAverage decayed, missing and filled teeth per child, including temporary and permanent teeth
^cBrathall’s SiC Index. DMFT for the third of the population with the highest caries levels (higher DMFT Index)
^dRatio between filled teeth and DMFT/dmft Index, multiplied by 100
^eRatio between DMFT/dmft Index and total examined teeth, multiplied by 100

ISSN: 1472-6831