Table 1.
Assessment of methodological quality of the included RCTs by Jadad scoring criteria*
| Trial | Randomized† | Double-blinded§ | A description of withdrawals or dropouts | Jadad score |
|---|---|---|---|---|
| Inyang-Etoh PC, 2009 | 1 | 2 | 0 | 3 |
| Borrmann S, 2001 | 2 | 2 | 1 | 5 |
| Santos AT, 1979 | 1 | 2 | 1 | 4 |
| McMahon JE, 1979 | 1 | 1 | 1 | 3 |
| Katz N, 1979 | 1 | 2 | 1 | 4 |
| Liu ZG, 1997 | 1 | 0 | 1 | 2 |
| Song Y, 2006 | 1 | 2 | 0 | 3 |
| Li YS, 2005 | 1 | 2 | 1 | 4 |
| N'Goran EK, 2003 | 2 | 2 | 1 | 5 |
| Utzinger J, 2000 | 2 | 2 | 1 | 5 |
| Tian ZY, 1999 | 2 | 2 | 0 | 4 |
| Huang AS, 1999 | 1 | 2 | 1 | 4 |
| Song Y, 1998 | 1 | 2 | 1 | 4 |
| Xu MS, 1997 | 1 | 2 | 1 | 4 |
| Tian ZY, 1997 | 1 | 2 | 1 | 4 |
| Wang JL, 1997 | 1 | 2 | 1 | 4 |
| Xiao SH, 1996 | 1 | 2 | 0 | 3 |
| Xiao SH, 1995 | 1 | 2 | 1 | 4 |
| Xu MS, 2001 | 1 | 2 | 0 | 3 |
| Cui JF, 2001 | 1 | 2 | 0 | 3 |
| Sun MX, 2000 | 1 | 2 | 0 | 3 |
| Zhang SJ, 2000 | 1 | 2 | 0 | 3 |
| Yi ZH, 2000 | 1 | 2 | 1 | 4 |
| Liu HY, 1999 | 1 | 2 | 0 | 3 |
| Xu MS, 1998 | 2 | 2 | 0 | 4 |
| Liu ZD, 1996 | 1 | 2 | 0 | 3 |
| Xu MS, 1996 | 1 | 2 | 1 | 4 |
| Wu LJ, 1995 | 1 | 2 | 1 | 4 |
| Hou XY, 2008 | 1 | 2 | 1 | 4 |
* Range 0~5 (the higher the Jadad score is, the higher the quality of study is).
† Represents generation of allocation sequence.
§ Represents allocation concealment.