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. 2016 Feb 29;2016(2):CD007880. doi: 10.1002/14651858.CD007880.pub3

Heikkinen 1995.

Methods RCT
Participants Children at risk of AOM
 Age range: 1 to 4 years of age
Interventions Amoxicillin/clavulanic acid or placebo
Outcomes Otitis
Notes Children at risk of AOM
Risk of bias
Bias Authors' judgement Support for judgement
Random sequence generation (selection bias) Low risk Allocation sequence was described as randomised and generated by a computer
Allocation concealment (selection bias) Low risk Participants and investigators enrolling participants could not foresee assignment because of sequentially numbered drug containers of identical appearance
Blinding of participants and personnel (performance bias) 
 All outcomes Unclear risk The trial was described as double‐blind but the method of blinding was not described
Blinding of outcome assessment (detection bias) 
 All outcomes Unclear risk The trial was described as double‐blind but the method of blinding was not described
Incomplete outcome data (attrition bias) 
 All outcomes Low risk Reasons for missing outcome data are unclear but do not seem to be related to clinical motives
Selective reporting (reporting bias) Unclear risk The report gives insufficient information to permit judgement of adequacy or inadequacy
Other bias Low risk The trial appears to be free of other sources of bias