Table 2 Results of the risk of bias assessment
Author, year | Sequence generation | Allocation concealment | Blinding of participants, personnel and outcome assessors | Incomplete outcome data | Selective outcome reporting | Other sources of bias |
|---|---|---|---|---|---|---|
Annunziato 2015 | - | - | - | ? | ? | ? |
Breu-Dejean 2016 | + | + | - | ? | ? | ? |
Chisholm 2001 | ? | ? | - | ? | ? | ? |
Chisholm 2013 | + | ? | - | + | ? | ? |
De Geest 2006 | + | + | - | + | ? | ? |
Fennell 1994 | ? | ? | - | ? | ? | ? |
Garcia 2015 | + | + | - | ? | ? | ? |
Henriksson 2016 | ? | + | - | ? | ? | ? |
Hardstaff 2003 | ? | ? | - | - | ? | ? |
Joost 2014 | - | - | - | ? | ? | ? |
Russel 2011 | + | + | - | + | ? | ? |
Tschida 2013 | - | - | - | ? | ? | ? |