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. 2013 May 31;2013(5):CD002095. doi: 10.1002/14651858.CD002095.pub5

Carlsson 1998.

Methods Randomised 
 Double‐blinded 
 ITT
Participants n = 261 
 Heartburn 
 No oesophagitis
Interventions Four weeks 
 OME 20 mg 
 OME 10 mg 
 Placebo
Outcomes Symptom relief 
 Symptom control 
 Quality of life
Notes ENRD
Risk of bias
Bias Authors' judgement Support for judgement
Random sequence generation (selection bias) Unclear risk Insufficient information about the sequence generation process to permit judgement.
Allocation concealment (selection bias) Unclear risk Method of concealment not described.
Blinding (performance bias and detection bias) 
 All outcomes Unclear risk "Double blind treatment" stated, unclear how it was performed, insufficient information to permit judgement.
Incomplete outcome data (attrition bias) 
 All outcomes Low risk Missing outcome data balanced in numbers across intervention groups, with similar reasons for missing data across groups.
Selective reporting (reporting bias) Unclear risk Unclear
Other bias Unclear risk Unclear