The number of missed hospital outpatient appointments increases following the clock change in the UK on March 25 2018.
Patients are 5% more likely to miss an appointment in the week after the clocks go forward compared with the previous week.
NHS figures show that there were 8 million missed appointments in 2016/17.
Each hospital outpatient appointment costs £120 so missed appointments represent a significant financial issue for the NHS and have a negative impact on patient care.
Psychologists at Lancaster and York universities analysed over 2 million appointments in Scotland from 2005 to 2010 before, during and after the spring and autumn clock changes.