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. Author manuscript; available in PMC: 2014 Jun 26.
Published in final edited form as: Cochrane Database Syst Rev. 2008 Oct 8;(4):CD007065. doi: 10.1002/14651858.CD007065.pub2
Study Reason for exclusion
Atlay 1978 Cross-over design. No data reported for the first stage of the study
Briggs 1972 Cross-over design. No usable data.
Brunclik 1988 High post-randomisation exclusion rates (20%). Half of the exclusions were for reasons of non-compliance
Carne 1964 Cross-over design. No data reported for the first stage of the study
Hey 1978 Study focusing on gastric sphincter pressure. No data reported for review outcomes
Kovacs 1990 No usable data on review outcomes.
Lang 1989 High post-randomisation attrition rates (38% lost to follow up by 2 weeks)
Larson 1997 Cross-over design. No data for the first stage of the study.
Ranchet 1990 Not clear whether this was a RCT. No information on how randomisation was achieved and intervention and control group sizes were very different
Shaw 1978 High attrition rates (24%). Symptoms were only assessed up to 60 minutes after treatment

RCT: randomised controlled trial