Table 1 Demographic characteristics of the study population.

Gender

   Women

   Men

Age (years)

   17–24

   25–34

   35–44

   45–54

   55–64

   ≥ 65

Education level

   Illiterate or write name

   Basic primary

   Uncomp.1^st grade

   Comp. 1^st grade

   Uncomp. 2^nd grade

Smoking habits

   Nonsmoker

   Smoker

Alcohol intake

   Nondrinker

   Drinker

Occupation

   Fishing

   Fishing + other

   Agriculture

   Housewife

   Others

Residence time (years)

   <5

   5 ≥ 20

   20 ≥ 35

   35 ≥ 50

   ≥ 50