The Department of Health has published results of a trial of a system of text message reminders to reduce missed outpatient appointments.
This randomised controlled trial tested the effectiveness of the reminder message sent to outpatients. Results showed if the message included the specific cost to the NHS of not attending then the patient was more likely to attend or rearrange their appointment – rather than miss it.
The full analysis has been published in a peer-reviewed journal article:
Full reference: Hallsworth M, Berry D, Sanders M, Sallis A, King D, et al. (2015) Stating Appointment Costs in SMS Reminders Reduces Missed Hospital Appointments: Findings from Two Randomised Controlled Trials. PLoS ONE 10(10)