Table 3

Quality appraisal of the included studies

Study reference	1. Identified aim	2. Method – aim	3. Method – question	4. Theoretical framework	5. Sampling – aim	6. Collection - aim	7. Analysis rigour	8. Researchers influence	9. Explicit findings	10. All data accounted	11. Transferability	12. Relevance
1. Sweden, 2006/7	Yes	Yes	Yes	Yes	Yes	Yes	Part.	Yes	Yes	Part.	Yes	Yes
2. Sweden, 2007	Yes	Yes	Yes	Yes	No	Yes	Part.	No	Yes	Part.	No	Yes
3. UK, 2013	Yes	Yes	Yes	No	Yes	Yes	Yes	No	Yes	No	Yes	Yes
4. UK, 2005	No	Yes	Yes	No	No	Part.	Yes	No	Yes	Part.	Yes	Yes
5. Denmark, 2006	Yes	Yes	Yes	No	Part.	Yes	Yes	No	Yes	Yes	Yes	Yes
6. UK, 2001	Yes	Yes	Yes	No	Part.	Part.	Yes	No	Yes	Part.	Yes	Yes
7. UK, 2012	Yes	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes
8. US, 2009	Yes	Yes	Yes	No	Part.	Yes	Yes	No	Yes	Part.	Yes	Yes
9. Sweden, 2006	Yes	Yes	Yes	No	No	Yes	Part.	No	Yes	Yes	No	Yes
10. Australia, 2004	Yes	Yes	Yes	No	Part.	Yes	No	No	Yes	No	No	Yes
11. US, 1989 – 1993	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes
12. Sweden, 2008	Yes	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes
13. Sweden, 2012	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes
14. Sweden, 2004	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes	Yes	Yes	Yes
15. Sweden, 2003	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes
16. Sweden, 2003	Yes	Yes	Yes	No	No	Yes	Yes	No	Yes	Yes	Yes	Yes
17. Sweden, 2007	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	No	No	Yes	Yes
18. Sweden, 2000	Yes	Yes	Yes	No	No	Yes	No	No	No	No	No	Yes
19. Sweden, 2013	Yes	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes

Footnote: ‘Part.’: partially. Details about the CASP tool may be found in the protocol shared as an online supplementary file.