Table 4.
ROB assessment for the included studies by symptom: pain, nausea and vomiting, ileus, hiccup, fever, QOL, and gastrointestinal symptoms.
| Author | Random sequence generation | Allocation concealment | Blinding of participants | Blinding of outcome assessment | Incomplete outcome data | Selective reporting |
|---|---|---|---|---|---|---|
| Pain | ||||||
| Liu 2010 [16] | U | U | N | N | Y | Y |
| Li 2009 [17] | U | U | N | N | Y | Y |
| Shen 2009 [18] | U | U | N | N | Y | Y |
| Dou et al. 2004 [19] | U | U | N | N | Y | Y |
| Wang et al. 2004a [20] | U | U | N | N | Y | Y |
| Wang et al. 2004b [21] | U | U | N | N | Y | Y |
| Bai 2003 [22] | U | U | N | N | Y | Y |
| Guan et al. 2001 [23] | U | U | N | N | Y | Y |
|
| ||||||
| Nausea and vomiting | ||||||
| Liu et al. 2011 [24] | U | U | N | N | Y | Y |
| Yang et al. 2011 [25] | U | U | N | N | Y | Y |
| You et al. 2009 [26] | U | Y | N | N | Y | Y |
| Chen 2007 [27] | U | U | N | N | Y | Y |
| Hu 2003 [28] | U | U | N | N | Y | Y |
| Tao et al. 2000 [29] | U | U | N | N | Y | Y |
|
| ||||||
| Ileus | ||||||
| Chen et al. 2010 [31] | U | U | N | N | Y | Y |
| Feng et al. 2007 [32] | U | U | N | N | Y | Y |
|
| ||||||
| Hiccup | ||||||
| Sui and Zhang 2009 [33] | U | U | N | N | Y | Y |
| Xia et al. 2000 [34] | U | U | N | N | Y | Y |
|
| ||||||
| Fever | ||||||
| Yan et al. 1999 [35] | U | U | N | N | Y | Y |
| Yan et al. 1997 [36] | U | U | N | N | Y | N |
|
| ||||||
| QOL | ||||||
| Xue 2005 [37] | U | U | N | N | Y | Y |
|
| ||||||
| Gastrointestinal symptoms | ||||||
| Zhao et al. 2008 [38] | U | U | N | N | Y | Y |
ROB was assessed using the ROB assessment tool from the Cochrane Handbook for Systematic Reviews of Interventions [39].
N: no (high risk of bias); QOL: quality of life; ROB: risk of bias; U: Unclear (uncertain risk of bias); Y: yes (low risk of bias).