Table 2 Main methodological characteristics of included articles
No. | Year | First author | Duration (months) | Sites | Allergen | Scores in Jadad scale | ||||
|---|---|---|---|---|---|---|---|---|---|---|
Treatment period | Evaluation Period | Randomization | Blind | Drop-outs | Total | |||||
1 | 2010 | Pfaar | 12/24 | 4 | Multicenter | Birch pollen | 1 | 2 | 1 | 4 |
2 | 2013 | Pfaar | 12/24 | 7 | Multicenter | Birch/grass | 2 | 2 | 1 | 5 |
3 | 2012 | Pfaar | 12/24 | 4.5 | Multicenter | Grass | 1 | 2 | 1 | 4 |
4 | 2010 | Höiby | 12/24 | 1 | Multicenter | Birch | 2 | 2 | 1 | 5 |
5 | 2006 | Colás | 12 | 1 | Monocenter | Russian thistle | 1 | 1 | 1 | 3 |
6 | 2005 | Ameal | 12 | 1 | Monocenter | House dust mite | 1 | 1 | 1 | 3 |
7 | 2005 | Álvarez-Cuesta | 12 | 1 | Monocenter | Grass/olive | 1 | 1 | 0 | 2 |
8 | 2006 | García-Robaina | 12 | 12 | Monocenter | House dust mite | 1 | 1 | 1 | 3 |