Table 1.
Analysis for the quality of included studies
| Study | Multicenter | Sequence generation | Allocation concealment | Double blinding | With-drawn (%) | Score | ITT analysis | Industry funded |
|---|---|---|---|---|---|---|---|---|
| Hollander 2011 | Yes | Yes | Yes | No | 15.2 | 3 | Not informed | Yes |
| Barnett 2012 | Yes | Yes | Yes | Yes | 11.3 | 5 | Not informed | Yes |
| Hong 2012 | No | Yes | Yes | No | 11.4 | 3 | Yes | No |
| Vilsbol 2010 | Yes | Yes | Yes | Yes | 12.0 | 5 | Not informed | Yes |
| Yki-Jarvinen 2013 | Yes | Yes | Yes | Yes | 15.7 | 5 | No | Yes |
| Fonseca 2007 | Yes | Yes | Yes | Yes | 19.6 | 4 | Yes | Yes |
| Rosenstock 2009 | Yes | Yes | Yes | Yes | 18.2 | 5 | Yes | Yes |