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. 2016 Dec 1;2016(12):CD002007. doi: 10.1002/14651858.CD002007.pub4

Pedersen 1986.

Methods Not double blind, elective regimen,
 crossover ‐ 3 months in between treatment arms.
Participants 20 participants (10 male, 10 female), mean age 12.6 years. PsA colonised. 3 drop outs, 17 completed trial.
Interventions Ceftazidime 150 mg/kg/day, 8‐hourly vs ceftazidime plus tobramycin 10 mg/kg/day, 8‐hourly, 14‐day course.
Outcomes Lung function, inflammatory markers, development of resistant strains.
Notes  
Risk of bias
Bias Authors' judgement Support for judgement
Random sequence generation (selection bias) Unclear risk Described as randomised, but no details of method given.
Allocation concealment (selection bias) Unclear risk Not discussed.
Blinding (performance bias and detection bias) 
 All outcomes Low risk Both interventions given with same volume and in same way.
Incomplete outcome data (attrition bias) 
 All outcomes Low risk 3 participants excluded ‐ reasons given (bacteriological resistance developed between treatment arms in 2 participants and a 3rd withdrew on first day of 2nd treatment arm due to nausea).