Table 1. Size, sex and age at registration of the sample population by field of operations of the United Nations Relief and Works Agency, 2008.

Field	Sample	Males (%)	Mean age (days) at registration (SD)
Jordan	3461	1679 (48.5)	21.7 (± 22.2)
Lebanon	1776	902 (50.9)	14.3 (± 13.3)
Syrian Arab Republic	3128	1542 (49.3)	15.5 (± 13.8)
West Bank	2130	1078 (50.7)	21.8 (± 16.4)
Gaza Strip	3707	1895 (51.1)	8.1 (± 5.2)

SD, standard deviation.