Table 1.

Demographic variables of patients undergoing surgery

Variable	Frequency	Percentage
Age
Less than 20	2	1%
20-40	23	23%
40-60	39	39%
>60	36	36%
Gender
Male	60	60%
Female	40	40%
Education
Primary school	57	57%
High school	31	31%
Intermediate and above	12	12%