Table 2 Changes in types of mandibular dental arch form from age 12 through 15 to age 18 years.

From: Adolescent dental arch development among Southern Chinese in Hong Kong: a geometric morphometric approach

Age (years)

Clusters

p-value

Pair-wise comparison

Narrow

N (%)

Middle

N (%)

Wide

N (%)

Age pair

p-value

12

81 (27.2)

62 (28,4)

75 (34.4)

 

12 vs 15

p < 0.01***

15

46 (21.6)

82 (37.6)

90 (41.3)

p < 0.001***

15 vs 18

p < 0.001***

18

90 (41.3)

83 (38.1)

45 (21.6)

 

12 vs 18

p < 0.01**

  1. **p < 0.01; ***p < 0.001.