Table 1.

Characterization of the studied population

	Control Group	Exposed Group	P value
Number of subjects	85	80
Gender
Male	31 (36.6%)	48 (60.0%)	0.002
Female	54 (63.5%)	32 (40.0%)
Age (years)
Range	20-55	19-56
Mean	33.87	35.74	0.180
St. Deviation	8.262	9.470	0.024
Smoking status
Non-smokers	59 (69.4%)	55 (68.8%)	0.927
Smokers	26 (30.6%)	25 (31.3%)
Years of exposure
Range	------	1 - 35