Table 1. Demographic characteristics of the study population (n = 224).

Education	Under diploma	92(41.4%)
	Diploma	89 (39.7%)
	Associate diploma	36 (15.3%)
	B.Sc.	8 (3.6%)
Working hours per days	8	149 (66.5%)
	16	75 (33.5%)
Age	M (±SD)	42.29 (9.27)
	Min-Max	23-61
Work experience (yrs)	M (±SD)	17.97 (8.05)
	Min-Max	2-30