Table A2.

STROBE compliance for all included studies in the systematic review.

	S1	S2	S3	S4	S6	S5	S7	S8	S9	S10	S11	S12	S13
Title and abstract	x	X	x	x	x	x	x	x	x	x	x	x	x
Introduction
Background	x	x	x	x	x	x	x	x	x	x	x	x	x
Objectives	x	x	x	x	x	x	x	x	x	x	x	x	x
Methods
Study design	x	x	x	x	x	x	x	x	x	x	x	x	x
Setting	x	x	x	x	x	x	x	x	x	x	x	x	x
Participants	x	x	x	x	x	x	x	x	x	x	x	x	x
Variables	x	x	x	x	x	x	x	x	x	x	x	x	x
Data sources	x	x	x	x	x	x	x	x	x	x	x	x	x
Bias
Study size	x	x	x	x	x	x	x	x	x	x	x		x
Quantitative variables	x	x	x	x	x	x	x	x	x	x	x	x	x
Statistical methods	x	x	x	x	x	x	x	x	x	x	x	x	x
Results
Participants
a numbers	x	x	x	x	x	x	in method part	x		x	x	x	x
b reasons for non-participation		x			x			x					x
c flow diagram		x						x
Descriptive data
a characteristics	x	x	x	x	x	x	x	x	x	x	x	x	x
B number of participants with missing data				x									x
c cohort study: summarise follow-up	x
Outcome data	x	x		x	x	x	x	x		x	x	x	x
Main results
a unadjusted estimates	x	x	x	x	x	x	x	x	x	x	x	x	x
b report category boundaries	x	x	x	x	x	x	x	x		x	x		x
c consider translating estimates				x		x		x
Other analyses	x	x	x	x	x	x		x	x		x		x
Discussion
Key results	x	x	x	x	x	x	x	x	x	x	x	x	x
Limitations	x	x		x	x	x	x	x		x	x	x	x
Interpretation	x	x	x	x	x	x	x	x	x	x	x	x	x
Generalisability	x			x	x	x		x			x		x
Other information
Funding					x							x	x
Design	Cohort study	Observational study			Cross-sectionnal study	Case-control study	Case-control study	Prospective observational study		Cross-sectionnal study		Longitudinal study	Prospective observational study