Table 1 Socio-demographic variables.

Age (years)

   18–24

   25–34

   35–44

   45–54

   55–64

   65–74

   > 75

Gender

   Male

   Female

Education

   < 5 years

   5 years

   8 years

   13 years

   > 13 years

Occupation

   Manager/Director

   Professional

   Business man

   Employee

   Labors

   House keeping

   Student

   Retired

   Unemployed

Marital status

   Single

   Married

   Widowed

   Divorced/Separated