|
Study
|
Random sequence generation
|
Allocation concealment
|
Blinding of participants/personnel
|
Blinding of outcome assessment
|
Incomplete outcome data
|
Selective reporting
|
Summary assessment
|
|---|
|
Alissa et al. [21]
|
+
|
+
|
+
|
?
|
+
|
+
|
Unclear
|
|
Sakka et al. [24]
|
–
|
–
|
–
|
+
|
+
|
+
|
High
|
|
Winnett et al. [25]
|
n/a
|
–
|
–
|
–
|
?
|
+
|
High
|
- Key: (+) = low risk of bias, (?) = unclear risk of bias, (−) = high risk of bias, n/a= not available
