Table 1 Example of Search Strategy from Medline (R) 1946 to February Week 1 2015

1

(birthplace or place of birth) ti,ab.

2

((home or hospital or institut$ or place or locat$ or setting$) adj3 (birth$ or confine or confinement or confining or deliver$)). ti,ab.

3

Home childbirth.mp. or Home Childbirth/

4

Delivery, Obstetric/px

5

1 or 2 or 3 or 4

6

(choice or preference or decision$ or dialog$ or discussion$ or consultation$ or conversation$ or communication$ or attitude$ or perspective$ or view$). Ti,ab. [mp = title, abstract, original title, name of substance word, subject heading word, keyword heading word, protocol supplementary concept word, unique identifier]

7

Patient Preference/

8

(Women$ adj3 Preference$).ti,ab

9

Midwifery/

10

(midwife$ or midwives)ti,ab. [mp = title, abstract, original title, name of substance word, subject heading word, keyword heading word, protocol supplementary concept word, unique identifier]

11

6 and 10

12

7 or 8 or 9 or 11

13

5 and 12