From: Signs and symptoms of temporomandibular disorders and oral parafunctions in urban Saudi arabian adolescents: a research report
Parafunction
Females n = 230 (%)
Males n = 155 (%)
Total 385%
P-Value*
Lip/cheek biting
45.8
15.6
41
**
Nail biting
28.5
33.3
29
ns
Bruxism
6.7
12.1
7.4
Thumb sucking
9
0
7.8