NCT01253330.

Methods	Open‐label randomised controlled trial with cross‐over assignment. Title: Usage, Usability & Effect on Adherence and Clinical Outcomes of Text Message Reminders for Adolescents With Asthma
Participants	Inclusion criteria: between the ages of 12 and 22; diagnosis of persistent asthma; receiving care at Cincinnati Children's Hospital Medical Center or affiliate; prescription of a controller medication; must have a cell phone that receives text messages; asthma not well controlled based on Asthma Control Test (ACT) score; English speaking Exclusion criteria: no diagnosis of persistent asthma; receiving asthma care other than at a Cincinnati Children's Hospital Medical Center or affiliate; asthma well controlled based on ACT score; does not have a cell phone that receives text messages or plans to change phones within the next 6 months; not taking a daily asthma controller medication; currently receiving asthma appointment or medication reminder text messages from another source
Interventions	Text message reminders vs no intervention
Outcomes	Asthma Control Test (ACT), Pediatric Quality of Life Scale (PedsQL), adherence change from baseline
Notes	Planned enrolment 61. Primary completion date December 2012. Listed as completed but no publications identified and no results posted