Table 3 Frequency of mention of determinants among observational studies (n = 47)

  Education

1

1

  Guidelines

1

1

  Knowledge

13

4

3

3

4

4

  Occupation

1

  Parity

1

  Skills

8

1

1

  Product acceptability

1

  Futility

1

  Practical considerations

4

  Willingness to pay

1

  Product cost

1

  Automaticity

1

  Disgust

1

  Nurture

1

1

4

  Sense of ownership

1

  Sense of pride

1

  Soc. hierarchies/ community influencers

2

1

1

1

4

  Traditional/cultural beliefs

5

4

2

1

5

  Adequate materials/supplies

7

5

1

  Convenience

1

2

  Infrastructure

4

3

  Time

1

1

1

1