Table 2 |
||||
|
Methodological quality assessment of included studies |
||||
|
Study |
Allocation concealment |
Blinding |
Intention to treat analysis |
Predefined outcomes |
|
|
||||
|
Gates 1972 [13] |
No |
No |
Unclear |
No |
|
Small 1982 [14] |
Unclear |
Unclear |
Unclear |
No |
|
Bertrand 1992 [16] |
Unclear |
"Double-blind" |
Yes |
Yes |
|
Ring 1985 [15] |
Unclear |
"Single" |
No |
Unclear |
|
Lasser 1987 [17] |
Yes |
Yes |
Unclear |
Yes |
|
Lasser 1994 [18] |
Yes |
Yes |
Yes |
Yes |
|
|
||||
|
Delaney et al. BMC Medical Imaging 2006 6:2 doi:10.1186/1471-2342-6-2 |
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