Table 2.
Study, year | Randomization method | Blinding | Withdrawals or dropouts | Total |
---|---|---|---|---|
Kouroumalis 1998 | 2 | 0 | 1 | 3 |
Farooqi 2000 | 2 | 0 | 1 | 3 |
Wu 2001 | 1 | 0 | 1 | 2 |
Yuen 2002 | 2 | 0 | 1 | 3 |
Yang 2003 | 1 | 0 | 1 | 2 |
Zhang 2004 | 2 | 0 | 1 | 3 |
Becker 2007 | 2 | 2 | 1 | 5 |
Dimitroulopoulos 2007 | 2 | 1 | 1 | 4 |
Ou 2007 | 1 | 0 | 1 | 2 |
Barbare 2009 | 2 | 2 | 1 | 5 |
Zhang 2010 | 1 | 0 | 1 | 2 |