Table 5 Difference of dental arch dimensions according to four ethnic groups in female subjects.

From: Evaluation of dental arch dimensions in 12 year-old Vietnamese children - A cross-sectional study of 4565 subjects

Variable (mm)

Kinh ethnic n = 1294 mean ± SEM

Tay ethnic n = 168 mean ± SEM

Thai ethnic n = 314 mean ± SEM

Muong ethnic n = 361 mean ± SEM

p

UCW

35.68 ± 2.01

35.06 ± 1.67

35.8 ± 2.61

35.42 ± 3.71

***

UM1W

53.55 ± 2.67

53.02 ± 2.79

54.31 ± 3.21

53.08 ± 2.5

***

UM2W

59.53 ± 3.16

57.52 ± 3.39

57.92 ± 4.03

57.86 ± 2.83

***

UAL

9.36 ± 2.46

7.42 ± 2.73

9.27 ± 1.99

7.83 ± 1.31

***

UP1L

29.01 ± 3.95

27.28 ± 4.19

28.06 ± 3.43

27.85 ± 2.25

***

UP2L

44.19 ± 2.9

41.98 ± 4.52

43.07 ± 3.2

42.85 ± 2.25

***

LCW

27.58 ± 2.43

26.83 ± 3.13

26.91 ± 2.61

26.93 ± 2.33

***

LM1W

45.21 ± 3.03

44.97 ± 2.94

47 ± 3.52

45.7 ± 2.32

***

LM2W

52.6 ± 3.7

52.7 ± 3.69

53.13 ± 3.73

52.61 ± 3.07

NS

LAL

6.69 ± 2.23

4.31 ± 2.29

6.71 ± 2.71

5.16 ± 1.2

***

LP1L

25.11 ± 4.01

22.63 ± 3.23

24.66 ± 3

23.4 ± 2.29

***

LP2L

41.17 ± 3.54

39.26 ± 4.15

38.96 ± 4.12

38.7 ± 2.48

***

  1. P was calculated using Kruskal-Wallis test; NS: Not significant; *P < 0.05, **p < 0.01, ***P < 0.001.