. 2016 Dec 21;11(12):e0166947. doi: 10.1371/journal.pone.0166947

Table 4. Methodological quality markers in the different articles analysed.

Study/tool	Background				Methods			Sample selection			Research tool			Results			Response rates			Interpretation & discussion				Ethics & disclosure
Study/tool	Justification of research methods	Background literature review	Explicit research questions	Clear study objectives	Description of methods used	Method of administration	Number and types of contact	Sample size calculation	Representativeness	Method of sample calculation	Description of the research tool	Instrument pretesting	Instrument reliability & validity	Results of research presented	Results address objectives	Generalizability	Response rate stated	How response rate was calculated	Discussion of non-response rate bias	Interpret and discuss findings	Conclusion	Recommendations	Limitations	Consent	Sponsorship	Research ethics approval
Assessments used operationally by professionals
VERA-2 (study A)	+	+	-	+	+	-	-	-	-	-	+	-	-	+	+	-	-	-	-	+	+	-	+	-	-	-
VERA-2 (study B)	+	+	+	+	+	-	-	+	-	-	+	-	+	+	+	-	-	-	-	+	+	+	+	-	-	-
ERG 22+	+	+	+	+	+	+	-	-	-	-	+	-	-	+	+	-	-	-	-	+	+	-	+	+	-	-
ERS	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
IVPG (study A)	+	+	-	+	+	-	-	-	-	-	+	-	-	+	+	-	-	-	-	+	+	-	-	-	-	-
IVPG (study B)	+	+	-	+	+	+	-	+	+	-	+	-	+	+	+	-	-	-	-	+	+	+	+	-	+	-
Tools developed as research measures
1992-RWA	+	+	-	-	+	-	-	+	+	-	+	-	+	+	+	-	-	-	-	+	-	-	-	-	-	-
RF-R	+	+	-	-	+	+	+	+	-	-	+	+	+	+	+	+	-	-	-	+	-	-	-	-	-	-
PHS	+	+	+	+	+	-	-	+	+	-	+	-	-	+	+	-	+	-	-	+	+	-	-	-	-	-
MMPI-2	+	+	+	+	+	-	-	+	+	-	+	-	-	+	+	-	+	-	-	+	+	-	-	-	-	-
RWA-R	+	+	+	+	+	+	+	+	+	-	+	+	+	+	+	+	-	-	-	+	+	-	-	+	-	-
ITFS	+	+	-	+	+	+	+	+	+	-	+	+	+	+	+	-	+	-	+	+	-	-	-	-	-	-
ARIS	+	+	+	+	+	+	-	+	+	+	+	+	+	+	+	+	+	-	-	+	+	-	-	-	-	-
NBMASA	+	+	+	+	+	+	+	+	+	+	+	-	+	+	+	-	+	-	-	+	-	-	-	+	+	+
MEMS	+	+	+	+	+	+	-	+	+	+	+	-	+	+	+	-	-	-	-	+	-	-	-	-	-	-
MDFI	+	+	+	+	+	+	+	+	-	+	+	-	+	+	+	+	-	-	-	+	-	-	+	+	-	-
RF-I	+	+	-	+	+	+	+	+	+	-	+	-	+	+	+	-	-	-	-	+	-	-	-	+	-	-
SyfoR	+	+	+	+	+	+	+	+	+	+	+	-	+	+	+	+	-	-	-	+	-	+	-	+	-	+
IFS	+	+	+	+	+	-	-	+	+	+	+	-	+	+	+	-	-	-	-	+	+	-	-	-	-	-
SSS (studies A-B)	+	+	+	+	+	+	+	+	+	-	+	+	+	+	+	+	+	+	-	+	+	+	+	+	-	-
ARIS-S	+	+	+	+	+	-	-	+	+	+	+	+	+	+	+	-	-	-	-	+	-	-	-	-	-	-
Schbley (2003)	+	+	+	+	+	+	+	+	+	-	+	-	+	+	+	-	+	-	-	+	+	+	+	-	+	-
TCS	+	+	-	+	+	+	-	+	+	-	+	-	+	+	+	-	+	-	-	+	-	+	+	-	-	-
TRAP-18	+	+	+	+	+	+	-	-	-	-	+	+	+	+	+	+	-	-	-	+	+	+	+	-	-	-

+, characteristic present in study;

- characteristic not present in study.