Table 2 Comparison of the socio-demographic bariables and permanent tooth emergence between the included and excluded students

Gender^a

0.195

 Female

50.3

37.9

 Male

49.7

62.1

 Birth

−0.17 (0.91)

−1.77 (1.68)

< 0.001***

 3 months

0.10 (0.85)

−0.67 (1.16)

< 0.001***

 12 months

0.06 (0.87)

−0.37 (0.96)

0.014

Gestational age (weeks)^a

–

 37

7.8

–

 38

22.3

–

 39

29.9

–

 40

26.2

–

  ≥ 41

13.8

–

Mode of delivery^a

0.008**

 Natural labour

53.2

27.6

 Assisted natural labour

20.4

17.2

 Caesarean birth

23.3

48.3

 Unknown

3.1

6.9

With congenital conditions^a

1.000

 Yes

99.0

100

 No

1.0

0

Type of feeding^a

0.749

 Never breastfed

54.2

58.6

 Exclusively breastfed 3 months or partially breastfed

36.5

37.9

 Exclusively breastfed for 3 months or more

7.8

3.4

 Unknown

1.4

0.0

Highest parental education^a

0.571

  ≤ 9th grade

30.9

20.7

 10th - 11th grade

44.7

51.7

  ≥ 12th grade

22.7

27.6

 Unknown

1.6

0

 mean (SD)

26.2 (2.5)

25.6 (3.7)

0.350

 Complete^a

  Yes

232

13

0.753

  No

253

16