Table 5.

Methodological quality assessment of the 10 quantitative studies included.

Study	Methodological element
Surveys	Sampling strategy indicates likelihood of generalizability	Reported good response rate (60%+)	Use of validated instruments	Appropriate statistical testing
Barker et al. [39]	√	Not stated	√	√
Cardinal et al. [37]	√	√	√	√
Galvin et al. [33]	×	√	×	×
Johnston et al. [40]	√	√	√	√
Kinne et al. [38]	×	√	√	√
Nosek et al. [36]	√	√	√	√
Resnick et al. [35]	×	√	√	√
Rimmer et al. [34]	×	×	√	√
Shaughnessy et al. [14]	√	×	√	√
RCT	Adequate allocation concealment	Adequate randomisation	Adequate blinding	Intention to treat analysis
Boysen et al. [41]	√	√	√	√