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Table 1 Mean of dmft score and Impact on oral health-related quality of life according to independent variables

From: Impact of dental caries on oral health related quality of life among preschool children: perceptions of parents

Variables

N (%)

dmft score

P-value

Impact on oral health-related quality of life

P-value

Mean

SD

Mean

SD

Gender

       

Boys

189 (54%)

3.93

4.22

0.935*

11.27

6/60

0.09**

Girls

161 (46%)

3.96

4.12

 

12.59

7/22

 

Child’s age

       

2 ≤ age < 3

51 (14%)

1.94

2.28

 > 0.0001****

8.21

4.87

 > 0.0002***

3 ≤ age < 4

94 (27%)

3.10

3.48

 

11.54

6.63

 

4 ≤ age < 5

104 (30%)

3.84

3.28

 

12.88

6.68

 

5 ≤ age < 6

101 (29%)

6.07

5.23

 

13

7.67

 

Mother’s education

       

Illiterate/ Elementary

21 (6%)

8.05

5.35

 > 0.0001****

13.85

6.62

0.001***

Secondary

18 (5%)

6.38

3.36

 

16.22

7.28

 

Diploma

91 (26%)

4.96

4.39

 

13.35

7.62

 

University

220 (63%)

2.93

3.57

 

10.72

6.33

 

Father’s education

       

Illiterate/ Elementary

16 (4%)

6.87

4.47

 > 0.0001****

15.81

8.19

0.004***

Secondary

34 (10%)

6.35

4.82

 

13.50

7.45

 

Diploma

84 (24%)

5.34

4.68

 

13.20

7.21

 

University

216 (62%)

2.81

3.35

 

10.81

6.40

 

Ethnicity

       

Fars

287 (82%)

3.60

4.03

0.002****

11.78

6.93

0.783***

Turkmen

33 (9.5%)

4.93

3.73

 

11.96

7.06

 

Sistani

30 (8.5%)

6.16

5.16

 

12.66

6.81

 

Birth order

       

First child

228 (65%)

3.83

3.98

0.457***

11.81

6.82

0.450***

Second child

106 (30%)

3.97

4.54

 

12.26

7.23

 

Third child

16 (5%)

5.43

4.21

 

10.31

6.20

 
  1. *Calculated by independent T-test
  2. **Calculated by Mann–Whitney test
  3. ***Calculated by Kruskal Wallis test
  4. ****Calculated by analysis of variance (ANOVA) test