Table 2: EPOC Tool for assessment of methodical quality of Non-RCTS.
| Outcome | Patel 2016 | Marra 2013 | Chen 2011 | Allegranzi 2010 | Rosenthal 2005 |
| Was allocation adequately concealed | No | No | No | No | |
| Were baseline outcome measurements similar? | Yes | Yes | Yes | Yes | Yes |
| Were baseline characteristics similar? | Yes | Yes | Yes | Yes | Yes |
| Did the study report incomplete data? | Yes | Yes | Yes | Yes | Yes |
| Did study distinctly describe intervention across the groups? | Yes | Yes | Yes | Yes | Yes |
| Did study prevent knowledge of intervention during the process? | No | Yes | No | Yes | Yes |
| Was the study adequately protected against contamination? | No | Yes | Yes | Yes | Yes |
| Did study prevent reporting of selective outcome | Yes | Yes | Yes | Yes | Yes |
| Was the study free from other biases? | Yes | Yes | Yes | Yes | Yes |
| Total score | 6/9 | 8/9 | 7/9 | 8/9 | 8/9 |