Table 2 Assessment of literature quality
Literature resources | Randomization | Random sequence generation | Allocation concealment | Blinding methodology | Withdrawal and dropouts | Jadad score |
|---|---|---|---|---|---|---|
Liet et al. 2006 [14] | Yes | Computer-generated | Yes | Yes | 6/0 | 5 |
Standl et al. 2008 [15] | Yes | Sealed randomization envelopes | Yes | None | 13/1 | 4 |
Akech et al. 2010 [16] | Yes | Randomization cards | Yes | Unclear | 16/0 | 4 |
Van Der Linden et al. 2013 [17] | Yes | By means of a macro written in SAS®, version 9.3.1. | Yes | Double-blinded | 0/0 | 5 |
Liet et al. 2003 [18] | Yes | Unclear | Unclear | Double-blinded | Unclear | 2 |
Hanart et al. 2009 [19] | Yes | The randomization assignment was concealed in an envelope | Yes | Double-blinded | Unclear | 4 |
Akkucuk et al. 2013 [20] | Yes | Unclear | Unclear | Unclear | Unclear | 1 |
Chong Sung et al. 2006 [21] | Yes | Unclear | Unclear | Unclear | Unclear | 1 |
Haas et al. 2007 [22] | Yes | Unclear | Unclear | Unclear | Unclear | 1 |
Wills et al. 2005 [23] | Yes | Computer-generated | Yes | Yes | 0/1 | 5 |
Sahoo et al. 2007 [24] | Yes | Unclear | Unclear | Unclear | 0/7 | 2 |
Osthaus et al. 2009 [25] | Yes | Computer-generated | Unclear | None | Unclear | 2 |
Witt et al. 2008 [26] | Yes | Unclear | Unclear | None | Unclear | 1 |