| Table 2: Methodological quality criteria and quality score | |||||||||||||
| Citation | Year | Clearly focused question? | Inclusion/exclusion | Comprehensive |
Number of search
strategies |
Number of years | Methodological quality | Methods weighting | Strength of evidence | Congruence data & author interpretation | COI | Quality Score | Percent |
| Aas | 2011 | 0 | 1 | 1 | 2 | 1 | 1 | 2 | 2 | 1 | 1 | 12 | 92% |
| Carroll | 2010 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 2 | 1 | 1 | 12 | 92% |
| Corbiere | 2006 | 1 | 1 | 1 | 2 | 1 | 1 | 2 | 2 | 1 | 1 | 13 | 100% |
| Corbiere | 2009 | 1 | 1 | 1 | 2 | 0 | 1 | 2 | 2 | 1 | 1 | 12 | 92% |
| Czabala | 2011 | 1 | 1 | 1 | 2 | 1 | 1 | 2 | 2 | 1 | 1 | 13 | 100% |
| Dick | 2011 | 1 | 1 | 1 | 2 | 1 | 1 | 2 | 1 | 1 | 1 | 12 | 92% |
| Furlan | 2012 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 1 | 1 | 12 | 92% |
| Noordick | 2010 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 1 | 1 | 12 | 92% |
| Palmer | 2012 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 1 | 1 | 12 | 92% |
| Pomaki | 2012 | 1 | 1 | 1 | 2 | 0 | 1 | 2 | 2 | 1 | 1 | 12 | 92% |
| Richardson | 2008 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 1 | 1 | 12 | 92% |
| Tompa | 2008 | 1 | 1 | 0 | 1 | 1 | 1 | 2 | 2 | 1 | 1 | 11 | 85% |
| Tveito | 2004 | 1 | 1 | 0 | 2 | 1 | 1 | 2 | 2 | 1 | 1 | 12 | 92% |
| van der Klink | 2001 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 11 | 85% |
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