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Table 1 Values of dmft/DMFT, dental caries prevalence and prevalence ratios (area D used as control) of children with primary and permanent dentition

From: Caries prevalence and manganese and iron levels of drinking water in school children living in a rural/semi-urban region of North-Eastern Greece

 

Children with primary dentition (1st grade of elementary school)

Children with permanent dentition (6th grade of elementary school)

dmft (mean ± SD)

DMFT (mean ± SD)

Total

2.3 ± 2.6

3.3 ± 3.6

Area A

3.2 ± 3.7

2.0 ± 2.4

Area B

4.5 ± 3.9

2.9 ± 2.2

Area C

3.0 ± 3.4

2.0 ± 2.6

Area D

2.3 ± 2.9

2.3 ± 2.7

p

0.004

0.138

 

Children with primary dentition (1st grade of elementary school)

Children with permanent dentition (6th grade of elementary school)

dmft >0 [n (%)]

DMFT >0 [n (%)]

Total

188 (64.2 %)

170 (60.7 %)

Area A

48 (63.2 %)

36 (54.5 %)

Area B

56 (80 %)

59 (78.7 %)

Area C

50 (53.3 %)

31 (53.4 %)

Area D

34 (53.1 %)

44 (54.3 %)

p

0.011

0.003

 

Children with primary dentition (1st grade of elementary school)

Children with permanent dentition (6th grade of elementary school)

Prevalence ratio vs. Area D (95 % CIs)

Prevalence ratio vs. Area D (95 % CIs)

Area A

1.19 (0.892–1.584)

1.00 (0.75–1.35)

Area B

1.51 (1.16–1.95)

1.45 (1.15–1.83)

Area C

1.13 (0.85–1.51)

0.98 (0.72–1.34)

  1. Area A High Mn–high Fe area, Area B High Mn–low Fe area, Area C Low Mn–high Fe area, Area D Low Mn–low Fe area