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. 2015 Jan 6;2015(1):CD011254. doi: 10.1002/14651858.CD011254.pub2

3. Oxidised Regenerated Cellulose versus No Treatment at Laparotomy for adhesion prevention after gynaecological surgery.

Oxidised Regenerated Cellulose versus No Treatment at Laporoscopy for adhesion prevention after gynaecological surgery (Ahmad 2014(a))
Patient or population: Women undergoing laparotomy
 Settings: Gynaecological surgery
 Intervention: Oxidised regenerated cellulose versus no treatment/control at laparotomy
Outcomes Illustrative comparative risks* (95% CI) Relative effect
 (95% CI) No of Participants
 (studies) Quality of the evidence
 (GRADE) Comments
Assumed risk Corresponding risk
No treatment Oxidised Regenerated Cellulose
Pelvic Pain           Not Reported
Pregnancy Rate           Not Reported
Live Birth Rate           Not Reported
Quality of Life           Not Reported
Incidence of adhesions ‐ De novo 
 Incidence at second look laparoscopy 282 per 1000 220 per 1000 
 (141 to 329) OR 0.72 
 (0.42 to 1.25) 271
 (1 study) ⊕⊕⊝⊝
 low1,2  
Incidence of adhesions ‐ Reformation (or mixture) 
 Incidence at second look laparoscopy 746 per 1000 528 per 1000 
 (451 to 618) OR 0.38 
 (0.27 to 0.55) 554
 (6 studies) ⊕⊕⊝⊝
 low2,3  
*The basis for the assumed risk (e.g. the median control group risk across studies) is provided in footnotes. The corresponding risk (and its 95% confidence interval) is based on the assumed risk in the comparison group and the relative effect of the intervention (and its 95% CI).
 CI: Confidence interval; OR: Odds ratio;
GRADE Working Group grades of evidence
 High quality: Further research is very unlikely to change our confidence in the estimate of effect.
 Moderate quality: Further research is likely to have an important impact on our confidence in the estimate of effect and may change the estimate.
 Low quality: Further research is very likely to have an important impact on our confidence in the estimate of effect and is likely to change the estimate.
 Very low quality: We are very uncertain about the estimate.
1 The one study investigating this comparison was at high risk of attrition bias, with a 22% dropout rate. It was also at unclear risk of selection, performance or detection bias. Therefore, the quality of the result was downgraded.
 2 There was potential publication bias, with Ahmad 2014(a) reporting that there was evidence of duplicate publication data and the existence of unreported data. The specific evidence for this was not detailed in the paper, though they do state that they had contacted the initial authors.
 3 Five of The six studies were at unclear risk of selection bias, performance bias and detection bias. One study was deemed at high risk of attrition bias, with two studies at unclear risk. One study was deemed at high risk of reporting bias, with the other five being at unclear risk. Therefore, the quality of the result was downgraded.