Variable

N

%

Age (years)

<20 years old

3

6.0

20 - 35 years old

39

78.0

>35 years old

8

16.0

Education

Elementary school

2

4.0

Junior high school

18

36.0

Senior high school

25

50.0

University

5

10.0

Parity

1

13

26.0

2 - 3

27

54.0

≥4

10

20.0