Study, year | Adequate sequence generation | Allocation concealment | Blinding | Incomplete outcome data addressed? | All outcomes Free of selective reporting | Free of other bias |
---|---|---|---|---|---|---|
Bourbeau 200312 | + | + | + | + | + | – |
Casas 200613,29 (Garcia-Aymerich 200722 | O | O | – | + | O | – |
Chandler 199015 | + | O | + | – | – | – |
de Toledo 200614 | O | O | – | O | + | – |
Finkelstein 2004,23 200616 | O | O | – | – | – | – |
Johnston 200017 | O | O | – | O | – | – |
Nguyen 200818 | + | + | – | – | + | + |
Vitacca 200919 | + | – | – | – | + | – |
Whitten 200720 | O | O | O | – | + | – |
Wong 200521 | + | O | + | O | + | + |
+ = criterion fulfilled. – = criterion not fulfilled. O = insufficient information.