Table A2.

The reporting quality of the included studies evaluated by the observational studies in epidemiology (STROBE) checklist.

	Nacul et al., [26]	Lindal et al., [13]	Rimes et al., [27]
Title and abstract
1a. Indicate the study design	Yes	Yes	Yes
1b. Informative and balanced abstract	Yes	Yes	Yes
Introduction
2. Background/rationale	Yes	Yes	Yes
3. Objectives	Yes	Yes	Yes
Methods
4. Study design	Yes	No/Unclear	No/Unclear
5. Setting	Yes	Yes	No/Unclear
6a. Participants	Yes	Yes	Yes
7. Variables	Yes	Yes	Yes
8. Data sources/measurement	Yes	Yes	Yes
9. Bias	No/Unclear	No/Unclear	No/Unclear
10. Study size	Yes	No/Unclear	No/Unclear
12a. Statistics: description of all methods	Yes	Yes	Yes
12b. Statistics: subgroups and interactions	Yes	Yes	Yes
12c. Statistics: missing data	Yes	Yes	Yes
12d. Statistics: loss to follow-up	Yes	Not applicable	Yes
12e. Statistics: sensitivity analyses	Yes	No/Unclear	No/Unclear
Results
13a. Participants: individual at each stage	Yes	Yes	Yes
13b. Participants: reasons for non-participation	Yes	No/Unclear	Yes
13c. Participants: flow diagram	Yes	No/Unclear	No/Unclear
14a. Descriptive data: characteristics of participants	Yes	Yes	Yes
14b. Descriptive data: missing data	Yes	Yes	Yes
14c. Descriptive data: follow-up	Yes	Not applicable	Yes
15. Outcome data	Yes	Yes	Yes
16a. Main results	Yes	Yes	Yes
Discussion
18. Key results	Yes	Yes	Yes
19. Limitations	Yes	Yes	Yes
20. Interpretation	Yes	No/Unclear	No/Unclear
21. Generalisability	Yes	No/Unclear	No/Unclear
Other information
22. Funding	No/Unclear	No/Unclear	No/Unclear

Note. The following items are not displayed in the figure as they were not applicable to the included studies: 6b, 11, 16b, 16c, 17.