Table 1. Frequency distribution of ear, nose and throat (ENT) infection, trauma, orthodontic treatment, and headache in the studied population (n = 800) .

History	TMD+	TMD-	Total	P-value
ENT infection	34.3%	26%	28.9%	P=0.001*
Trauma	20.4%	11.1%	14.3%	P>0.05
Orthodontic treatment	5.5%	4.1%	4.6%	P>0.05
Headache	14.1%	12.1%	12.8%	P>0.05

TMD+, with temporomandibular disorders; TMD−, without temporomandibular disorders; ENT infection, ear, nose, and throat infection.

* Statistically significant.