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. 2016 May 17;17:58. doi: 10.1186/s12931-016-0365-0

Table 1.

General characteristics of the studied population

Items Total No. = 1239 (100 %)
%
Age /years
 15–24 37.7
 25–39 29.5
 40–54 22.7
 55+ 10.1
Mean ± SD 33.3 ± 13.8
Sex
 -Male 75.4
 -Female 24.6
Residence by governorate
 -Urban governorate 20.5
 -Lower Egypt governorate 60.2
 -Upper Egypt governorate 16.7
 -Frontier governorate 2.6
Educational level
 -Informal education 9.5
 -Preparatory education 6.4
 -Secondary education 9.5
 -Above secondary education 74.6
History of smoking
 -Non- smoker 51.4
 -Smoker 48.6
  Male 94.7
  Female 5.3