Male

Female

Total

N

%

N

%

N

%

171

38.3

276

61.7

447

100.0

Age

12

31

18.2

27

9.8

58

13.0

13

29

17.0

38

13.8

67

15.0

14

18

10.5

34

12.3

52

11.6

15

28

16.4

27

9.8

55

12.3

16

16

9.4

34

12.3

50

112

17

16

9.4

29

10.5

45

10.1

18

18

10.5

43

8.3

61

13.6

19

15

1.8

44

16.0

59

13.0

Grade

7

34

19.9

26

9.4

59

13.4

8

26

15.2

38

13.8

64

14.3

9

19

11.1

33

12.0

52

11.6

10

30

17.5

38

13.8

68

15.2

11

19

11.1

32

11.6

51

11.4

12

43

25.2

109

39.5

152

34.0

Parents’ educational level

≤4 grade

3

2.0

16

6.9

19

4.3

5 - 12 grade

105

61.4

134

48.6

239

53.5

>12 grade

30

17.5

37

13.4

67

15.0

Without information

33

19.1

89

31.1

122

27.2

Crowding índex

≤1.0

135

78.9

247

89.5

382

85.5

>1.0

8

4.7

12

4.3

20

4.5

Without information

28

16.4

17

6.2

45

10.0

Residential area

Rural

100

58.5

192

69.6

292

65.3

Urban

71

41.5

84

30.4

155

34.7