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. 2006 Apr 19;2006(2):CD004200. doi: 10.1002/14651858.CD004200.pub4

Andersen 1989.

Methods RCT via sealed envelopes
Participants >60 years of age 
 Distal CBD stricture 
 Fit for surgery 
 Not for curative resection 
 86% had pancreatic CA
Interventions 7 / 10 Fr endoprosthesis 
 Bypass surgery
Outcomes Median Survival 
 Complications 
 Treatment Failures 
 Range of functioning time of endoprosthesis 
 Median length of hospitalisation 
 Quality of Life
Notes N=50
Risk of bias
Bias Authors' judgement Support for judgement
Adequate sequence generation? Unclear risk "Randomised by means of sealed envelopes"
Allocation concealment? Low risk Sealed envelopes
Blinding? 
 All outcomes High risk Neither arm
Incomplete outcome data addressed? 
 All outcomes Unclear risk Insufficient reporting of exclusions
Free of selective reporting? High risk Outcomes of interest incompletely reported
Free of other bias? Low risk