Table 1.

Distribution of the Study Population by Demographical Characteristics

Variable	Category	Cases	Controls	Total
Sex	Males	70	52	122
	Females	31	21	52
	Total	101	73	174
Age in years
	<18.0	1	9	10
	19-25	38	17	55
	26-35	43	30	73
	36-45	10	9	19
	46+	8	7	15
Level of Education
	illiterate	1	1	2
	Basic	9	9	18
	Secondary	52	37	89
	University	36	23	59