What makes health services usable?: Insights from a qualitative study of caregivers of children with disabilities.

Background: The concept of usability from the field of user-centered design addresses the extent to which a system is easy to use, including under extreme conditions. Apart from applications to technologies, however, little attention has been given to understanding what shapes usability of health services more generally. Health service usability may impact the extent to which patients avail themselves of and benefit from those services.