Table 2.
Quality assessment of the included studies
| Study | Study purpose | Literature | Design | Sample | Outcomes | Results | Data variability | Conclusions | Total score | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Study design | Bias (Y = 0, N = 1) | Description | Justification | Description | Reliability | Validity | Report of statistics | Appropriate analysis | Clinical importance | Dropouts | Estimates provided | Appropriate | ||||
| Cudre et al., 2006 [22] | Y | Y | Y | Y | Y | N | N/Y | N | N | Y/N | Y | N | NA | Y | Y | 8 |
| Dolphens et al., 2012 [23] | Y | Y | Y | N | Y | N | Y | Y | N | Y | Y | Y | NA | Y | Y | 12 |
| Dolphens et al., 2013 [24] | Y | Y | Y | N | N | N | Y | Y | N | Y | Y | Y | NA | Y | Y | 11 |
| Dolphens et al., 2014 [25] | Y | Y | Y | N | N | N | N | Y | N | Y | Y | Y | NA | Y | N | 9 |
| Perry et al., 2008 [26] | Y | Y | Y | N | Y | N | Y | Y | Y | Y | Y | Y | NA | Y | Y | 13 |
| Straker et al., 2008 [28] | Y | Y | Y | N | Y | N | Y | Y | N | N | Y | N | NA | Y | Y | 9 |
| Straker et al., 2009 [27] | Y | Y | Y | N | N | N | Y | Y | N | Y | Y | Y | NA | Y | Y | 11 |
| Wirth et al., 2013 [29] | Y | Y | Y | Y | N/Y | N | Y | N | N | Y | Y | Y/N | NA | Y | Y | 9 |
The results of both reviewers are stated only where they differed
Y Yes, N No