Greefhorst 1992.

Methods	Setting: muticentre study, The Netherlands, primary care or hospital outpatient setting unclear Length of intervention period: 6 weeks Randomisation: yes, method not stated Allocation concealment: unclear Design: crossover, no washout Masking: none Excluded: not stated Withdrawals: not stated Baseline characteristics: no demographic data presented Jadad score: 1
Participants	145 adults Inclusion criteria: Adult asthmatic patients already treated with inhaled corticosteroids No further details Exclusion criteria: No details
Interventions	BDP: 200 mcg 2xdaily (400 mcg/d) via Rotahaler DPI BUD: 200 mcg 2xdaily (400 mcg/d) via Turbuhaler DPI
Outcomes	Morning PEFR Evening PEFR Asthma symptom score Rescue beta2 agonist use
Notes	Study in abstract form only. No reply from author to clarify details of randomisation method used, further inclusion/exclusion criteria, patient withdrawals or data for outcomes. Not stated if carryover effects were tested for.
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment (selection bias)	Unclear risk	B ‐ Unclear