Table 1 Statistics of dentition, occlusion, oral hygiene between genders and ages in Ngari, Tibet.

From: A cross-sectional investigation on oral health and hygiene among children aged 7–10 years in extremely high altitude areas of China

 

Age (year)

p

Sex

p

7 (n = 164)

8 (n = 323)

9 (n = 343)

10 (n = 143)

Male

Female

Dentition

 Normal

156

294

324

141

0.029*

464

451

0.364

 Crowded

8

29

19

2

33

25

Occlusion

 Normal

141

293

304

135

0.083

439

434

0.171

 Malocclusion

23

30

39

8

58

42

  Overbite

6

4

21

2

16

17

  Overjet

5

6

1

4

14

2

  Cross-bite

12

20

17

2

28

23

Oral hygiene (GI)

 Good

72

166

170

41

0.00**

201

248

0.00**

 Medium

74

137

155

90

245

211

 Poor

18

20

18

12

51

17

  1. Chi-square test, * are significant (p < 0.05). ** are significant (p < 0.01). GI gingival index.
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