Chelsea and Westminster reduces the number of outpatients not attending 16 of its clinics through text message reminders Chelsea and Westminster hospital foundation trust has reduced its did not attend (DNA) rate by 26% since the introduction of a SMS text message reminder system, with falls in almost all of its outpatient clinics. The number of DNAs fell from 14% to 10.4% across 16 outpatient areas between the system being introduced in April 2010 and now. The trust says this is equivalent to 720 fewer missed appointments each month. Significant decreases were seen in physiotherapy, where the...