From: Possible causal relationships between competitive swimming in growing age and three-dimensional dentoalveolar development
Oral parameter
Swimmers
Non-swimmers
P(chi squared)
Breathing
Nasal
73
45
0.001
Oral
27
55
Lips
Competent
80
49
Incompetent
20
51
Swallowing
Normal
59
0.048
Abnormal
41