Table 1 Changes in types of maxillary 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)

Types of dental arch form

p-value

Pair-wise comparison

Narrow

N (%)

Middle

N (%)

Wide

N (%)

Age pair

p-value

12

81 (37.2)

88 (4.4)

49 (22.5)

p < 0.001***

12 vs 15

p = 0.17ns

15

92 (42.2)

69 (31.7)

57 (26.1)

15 vs 18

p < 0.001***

18

43 (19.7)

101 (46.3)

74 (33.9)

12 vs 18

p < 0.001***

  1. nsp > 0.05; ***p < 0.001.