Study included | Study design | Randomization | Blind method | Allocation concealment | Withdraw and dropout | Revised Jadad score | Level of evidence |
---|---|---|---|---|---|---|---|
Agee 1992 | RCT | 1 | 1 | 0 | 1 | 3 | II |
Brown 1993 | RCT | 2 | 1 | 0 | 1 | 4 | II |
Sennwald and Benedetti 1995 | RCT | 2 | 1 | 0 | 1 | 4 | II |
Dumontier 1995 | RCT | 2 | 1 | 0 | 1 | 4 | II |
Jacobsen 1996 | RCT | 1 | 1 | 0 | 1 | 3 | II |
MacDermid 2003 | RCT | 2 | 1 | 0 | 1 | 4 | II |
Ferdinand 2002 | RCT | 2 | 1 | 0 | 1 | 4 | II |
Trumble 2002 | RCT | 2 | 2 | 0 | 0 | 4 | II |
Wong 2003 | RCT | 2 | 2 | 0 | 1 | 5 | II |
Atroshi 2006 | RCT | 2 | 1 | 0 | 1 | 4 | II |
Soichi Ejiri 2012 | RCT | 2 | 2 | 0 | 0 | 4 | II |
Larsen 2013 | RCT | 2 | 2 | 0 | 1 | 4 | II |
Ho Jung Kang 2013 | RCT | 2 | 2 | 1 | 1 | 5 | II |