Serra‐Batlles 2002.

Methods	Study design: cross‐over RCT Duration: 8 weeks Location: Spain
Participants	Population: children with asthma and adults with COPD Baseline characteristics: NR Inclusion criteria: children (asthma) or adults (COPD) with history of condition for > 6 months' duration, only taking inhaled medication by another delivery system Exclusion criteria: myopathy, neuropathy leading to muscle weakness, tracheostomy, laryngectomy, mental health issues
Interventions	Treatment arms Diskus/Accuhaler inhaler followed by Turbuhaler inhaler and inhaler education Turbuhaler inhaler followed by Diskus/Accuhaler
Outcomes	Primary outcomes: inhaler preference, percentage correct inhalation technique, percentage achieving correct technique after education
Notes	Funding: NR