|
Study
|
Study year
|
NOS/ STROBE score
|
GRADE
|
Allocation concealment (Selection bias)
|
Blinding
|
Incomplete outcome data
|
Random sequence generation
|
Selective outcome reporting
|
Other sources of bias
|
|---|
|
Cox H
|
2014
|
4/19
|
VL
|
N
|
Y
|
Y
|
N
|
Y
|
A
|
|
Brust JC
|
2012
|
4/19
|
VL
|
N
|
Y
|
N
|
N
|
N
|
A, D
|
|
Vaghela JF
|
2015
|
4/19
|
VL
|
N
|
Y
|
Y
|
N
|
Y
|
A, D
|
|
Oyieng’o D
|
2012
|
4/19
|
VL
|
N
|
Y
|
Y
|
N
|
N
|
A, D
|
|
Joseph P
|
2011
|
4/19
|
VL
|
N
|
Y
|
Y
|
N
|
N
|
A, D
|
|
Van Deun A
|
2010
|
5/20
|
L
|
N
|
Y
|
Y
|
N
|
Y
|
A, D
|
|
Brust JC
|
2010
|
5/20
|
L
|
N
|
Y
|
Y
|
N
|
Y
|
A, D
|
|
Singla R
|
2009
|
4/19
|
VL
|
N
|
Y
|
Y
|
N
|
Y
|
A, D
|
|
Tupasi TE
|
2006
|
4/19
|
VL
|
N
|
Y
|
Y
|
N
|
Y
|
A, D
|
|
Thomas A
|
2007
|
4/19
|
VL
|
N
|
Y
|
Y
|
N
|
Y
|
A, D
|
|
Liu CH
|
2011
|
5/20
|
L
|
N
|
Y
|
Y
|
N
|
Y
|
A, D
|
|
Keshavjee S
|
2008
|
5/20
|
L
|
N
|
Y
|
Y
|
N
|
Y
|
A, D
|
|
Shin SS
|
2007
|
5/19
|
L
|
N
|
Y
|
N
|
N
|
Y
|
A, D
|
|
Cox HS
|
2007
|
4/19
|
VL
|
N
|
Y
|
N
|
N
|
N
|
A,D
|
|
Wei XL
|
2015
|
4/19
|
VL
|
N
|
Y
|
Y
|
N
|
N
|
A,D
|
|
Hirpa S
|
2013
|
5/20
|
L
|
N
|
Y
|
N
|
N
|
N
|
A, D
|
- A Attrition bias, D Detection bias
- VL Very Low: We are very uncertain about the estimate
- L Low: Further research is very likely to have an important impact on our confidence in the estimate of effect and is likely to change the estimate
- H High: Further research is very unlikely to change our confidence in the estimate of effect
- NOS score < 4: Low quality
- NOS score 4–5: Moderate quality
- Y: Low risk of bias
- N: High risk of bias
