Table 2 Quality assessment of included studies*
First author | Year | Random sample or whole population | Unbiased sampling frame (i.e. census data) | Adequate sample size (>300 subjects) | Measures were the standard | Outcomes measured by unbiased assessors | Adequate response rate (70%) and refusers described | Confidence intervals and subgroup analysis | Study subjects descirbed | Quality risk rating/8 |
|---|---|---|---|---|---|---|---|---|---|---|
Bethell | 2011 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |
NSCH | 2011/2012 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |
CHIS | 2003 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 7 |
CHIS | 2005 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 7 |
CHIS | 2009 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 7 |
CHIS | 2007 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 7 |
Ibironke | 2011 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 7 |
Zuckerman | 2009 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 7 |
Glascoe | 2013 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 6 |
Stevens | 2006 | 1 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 6 |
Ng | 2010 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 6 |
Restall | 2009 | 1 | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 6 |
VSEHQ | 2008 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 6 |
Davies | 2009 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 0 | 5 |
Glascoe | 1999 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 5 |
Glascoe | 1997 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 5 |
Rose Jacobs | 2008 | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 5 |
Glascoe | 2010 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 1 | 4 |
Glascoe | 2010 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 1 | 4 |
Kosht-Fedyshin | 2006 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 4 |
Limbos | 2011 | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 5 |
Oreto | 2010 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 1 | 4 |
Tough | 2008 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 1 | 4 |
Armstrong | 2008 | 0 | 1 | 0 | 1 | 0 | 0 | 1 | 3 | |
Campos | 2010 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 3 |
Coghlan | 2003 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 3 |
Kiing | 2012 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 3 |
McGookin | 2011 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 3 |
Palarca | 2008 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 1 | 3 |
Roux | 2011 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 3 |
Theeranate | 2005 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 3 |
Wake | 2005 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 3 |
Gustawan | 2010 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 3 |
Chuan | 2012 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 2 |
Mahli | 2002 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 2 |
Matibag | 2008 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 2 |
Sices | 2009 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 2 |