Table 1.

Assessment of Methodological Quality According to the McGill Mixed Methods Appraisal Tool (MMAT).

Study design	Appraisal score
Qualitative
Theurer et al, Canada, 2014	75% (***)
Quantitative randomized
Chiang et al, Taiwan, 2009	25% (*)
Haslam et al, the United Kingdom, 2010	25% (*)
Karimi et al, Iran, 2010	0% (.)
Serrani Azcurra, Argentina, 2012	75% (***)
Stinson et al, the United States, 2005	0% (.)
Gudex et al, Denmark, 2010	50% (**)
Quantitative nonrandomized
Chao et al, Taiwan, 2006	100% (****)
Tsai et al, Taiwan, 2010	100% (****)
Winningham et al, the United States, 2008	75% (***)