Table 2.
Quality assessment of the studies included in this meta-analysis using Jadad scale
| Ref. | Study design | Method of randomization | Double-blind | Method of double-blinding | Description of withdrawals | Total score2 |
| de Brouwer et al[26] 2012 | 1 | 1 | 1 | 0 | 1 | 4 |
| Byun et al[24] 20091 | 1 | 0 | 1 | 0 | 1 | 3 |
| Lee et al[17] 2010 | 1 | 1 | 1 | 0 | 1 | 4 |
| Kim et al[27] 2010 | 1 | 0 | 1 | 0 | 1 | 3 |
| Rondonotti et al[29] 2013 | 1 | 1 | 1 | 1 | 1 | 5 |
| Mui et al[28] 2004 | 1 | 1 | 1 | 1 | 1 | 5 |
| Saunders et al[30] 1996 | 1 | 1 | 1 | 1 | 1 | 5 |
| Corte et al[25] 2012 | 1 | 1 | 1 | 1 | 1 | 5 |
1
Abstract;
2
Jadad Score: 1-5, 5 is excellent and 1 is poor.