Variables

Frequency

Percentage

Type of studies

Quantitative studies

Qualitative studies

Mixed method study

Interventional study

29

20

1

1

56.8

39.2

2.0

2.0

Data collection tools

Questionnaire

In-depth Interview

Focus group discussion

Questionnaires & Lab test

31

4

10

6

60.8

7.8

19.6

11.7

Sampling method

Convenience

Snowball

Purposive

Random

Stratified

12

9

17

12

1

23.5

17.6

33.4

23.5

2