Table 3 Specifications of quality assessments
Publication | Quality (SIGN) | SIGN comments |
|---|---|---|
Zilberg et al., 1982 | – | Poorly described method |
Mooren et al., 2004 | ++ | Well described method and statistical analysis |
Beck et al., 2008 | ++ | Well described sample selection, randomization and method |
Eid et al., 2009 | + | Well described sample, poorly described method |
Sveen et al., 2010 | + | Inadequate described method |
Bryant et al., 2011 | + | Well described method |
Schütte et al., 2012 | + | Prospective study design |
Waller et al., 2015 | + | Retrospective design, but well described method |
Zijlstra et al., 2015 | ++ | Prospective study design |