Table II.
Risk of bias summary: Authors’ judgments about each risk of bias item for each included study
| Domain | Selection bias | Performance bias | Detection bias | Attrition bias | Reporting bias |
|---|---|---|---|---|---|
| Reference | |||||
| Geisler (2015) (22) |
|
|
|
|
|
| Geisler (2014) (23) |
|
|
|
|
|
| Beyda (2014) (24) |
|
|
|
|
|
| Takahashi (2014) (25) |
|
|
|
|
|
| Manhart (2013) (43) |
|
|
|
|
|
| Schwebke (2011) (27) |
|
|
|
|
|
| Schillinger (2003)(28) |
|
|
|
|
|
| Jang (2003) (29) |
|
|
|
|
|
| Rustomjee (2002) (30) |
|
|
|
|
|
| Skerke (2001) (31) |
|
|
|
|
|
| Kacmar (2001) (32) |
|
|
|
|
|
| Sendag (2000) - (33) |
|
|
|
|
|
| Hillis (1998) (34) |
|
|
|
|
|
| Thorpe (1996) (35) |
|
|
|
|
|
| Brihmer (1996) (36) |
|
|
|
|
|
| Stamm (1995) (37) |
|
|
|
|
|
| Hammerschlag (1993) (38) |
|
|
|
|
|
| Lauharanta (1993) (39) |
|
|
|
|
|
| Martin (1992) (40) |
|
|
|
|
|
| Nilsen (1992) (41) |
|
|
|
|
|
| Whatley (1991) (42) |
|
|
|
|
|
Green░=░Low risk of bias
Red= High risk of bias
Yellow░=░Unknown bias