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Study
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1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
Comments
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|---|
|
Forman DE
|
Yes
|
Yes
|
Yes
|
No
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
A
|
|
Harzand A
|
Yes
|
Yes
|
Yes
|
No
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
B
|
|
Laustsen L
|
Yes
|
Yes
|
Yes
|
No
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
B
|
|
Widmer RJ
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
A
|
- Key: 1: Clear description of “cause” and “effect”; 2: Similar participants included in comparisons; 3: Similar treatment or care other than the exposure in comparisons; 4: There was a control group; 5: Multiple measurements of the outcome; 6: Complete follow-up or strategies to deal with incomplete follow up; 7: Outcome measured in the same way for comparisons; 8: Outcome measured in a reliable way; 9: Appropriate statistical analysis
