Table 2 Quality assessment of included cross-sectional control studies
Author_Year | Design | RoB_P | CrA_P | RoB_I | CrA_I | RoB_RS | CrA_RS | RoB_TaF |
|---|---|---|---|---|---|---|---|---|
Albisetti 1997 | Cross sectional | Low | Low | Unclear | Low | Low | Low | Unclear |
Barrial 2011 | Cross sectional | Unclear | Unclear | Low | Low | Low | Low | Low |
Bazovska 2001 | Cross sectional | Unclear | Unclear | Unclear | Low | Unclear | Low | Low |
Bednarova 2006 | Cross sectional | Unclear | Unclear | Unclear | Low | Unclear | Low | Unclear |
Bennet 2008 | Cross sectional | Unclear | High | Unclear | Low | Unclear | Low | Unclear |
Blaauw 1993 | Cross sectional | Low | Low | High | High | Low | Low | Low |
Blaauw 1999 | Cross sectional | Low | High | Unclear | High/Low* | Low | Low | Unclear |
Blanc 2007 | Cross sectional | Unclear | Unclear | Unclear | Low | High | Low | Unclear |
Cermakova 2005 | Cross sectional | Low | Low | Unclear | Low | High | Low | Low |
Davidson 1999 | Cross sectional | Unclear | Unclear | Unclear | High/Low* | High | High | Low |
Ekerfelt 2004 | Cross sectional | Unclear | Unclear | Low | Low | Unclear | Low | Unclear |
Jansson 2005 | Cross sectional | Unclear | Unclear | Unclear | Low | High | High | Low |
Kolmel 1992 | Cross sectional | Unclear | Unclear | Unclear | Low | High | Low | Unclear |
Ljostad 2005 | Cross sectional | High | High | Unclear | Unclear | Low | Low | Low |
Popperl 2000 | Cross sectional | Unclear | Unclear | Unclear | Low | High | High | Low |
Roux 2007 | Cross sectional | High | Unclear | Unclear | High/Low* | Low | High | Unclear |
Skarpaas 2007 | Cross sectional | Low | Low | High/Unclear* | Low | Unclear | Low | Unclear |
Skogman 2008 | Cross sectional | Unclear | Unclear | High | High | Low | Low | Low |