Table 1.

Distribution of the study group by region of origin, sex and age class

	western Asia (n = 1289)	eastern Asia (n = 936)	northern & Saharan Africa (n = 138)	sub-Saharan Africa (n = 123)	Total (%)
Sex
Males	921	118	18	78	1135 (45.7)
Females	368	818	120	45	1351 (54.3)
Age class (age range)
1 (16–22)	216	33	38	16	303 (12.2)
2 (23–29)	414	311	67	64	856 (34.4)
3 (30–37)	375	391	21	36	823 (33.1)
4 (38–58)	284	201	12	7	504 (20.3)