Table 5 Methodological quality assessment
Reference | Year | Internal validity | Control of drop out | External validity | Statistical validity | Proportion Sample size vs determinants | Multi-collinearity | Confounding bias | Reporting | Total (max 8 points) |
|---|---|---|---|---|---|---|---|---|---|---|
Bremer [16] | 2004 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | 5.0 |
Chio [13] | 2004 | 1 | 0.5 | 1 | 1 | 0 | 0 | 1 | 1 | 5.5 |
Clarke [15] | 2001 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | 5.0 |
Dal-Bello-Haas [47] | 2000 | 1 | 0 | 0.5 | 1 | 0 | 0 | 0 | 1 | 3.5 |
Ganzini [45] | 1999 | 0 | 1 | 0.5 | 1 | 1 | 0 | 1 | 1 | 5.5 |
Gibbons [37] | 2013 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 7.0 |
Goldstein [38] | 2002 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 3.0 |
Ilse [10] | 2015 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 4.0 |
Krampe [27] | 2008 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 1 | 4.0 |
Lule [28] | 2008 | 1 | 0 | 0.5 | 1 | 0 | 0 | 1 | 1 | 4.5 |
Matuz [36] | 2010 | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 6.0 |
Matuz [30] | 2015 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 6.0 |
McCabe [19] | 2009 | 1 | 0 | 0.5 | 1 | 1 | 0 | 1 | 1 | 5.5 |
Montel [46] | 2012 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 4.0 |
Pagnini [29] | 2015 | 1 | 0.5 | 0.5 | 1 | 1 | 0 | 1 | 1 | 6.5 |
Peric [40] | 2010 | 1 | 0.5 | 1 | 1 | 0 | 1 | 1 | 1 | 6.5 |
Pizzimenti [43] | 2013 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 8.0 |
Robbins [31] | 2001 | 1 | 0.5 | 0.5 | 1 | 1 | 0 | 1 | 1 | 6.0 |
Simmons [14] | 2000 | 1 | 0.5 | 1 | 1 | 0 | 0 | 0 | 1 | 4.5 |
Tramtoni [42] | 2012 | 1 | 0 | 0.5 | 1 | 0 | 0 | 1 | 1 | 4.5 |
Vignola [41] | 2008 | 1 | 0.5 | 1 | 1 | 0 | 0 | 1 | 1 | 5.5 |
Winter [44] | 2010 | 1 | 0.5 | 0.5 | 1 | 0 | 0 | 1 | 1 | 5.0 |