The nurse consultant in mental health services: A national, mixed methods study of an advanced practice role.

WHAT IS KNOWN ON THE SUBJECT?: Internationally, systematic reviews have identified evidence of equal or improved clinical outcomes comparing advanced practitioner treatment with medical treatment as usual, across a range of specialities. Studies of nurse consultants in the United Kingdom have largely been non-empirical. Most studies specifically related to nurse consultant roles in mental health services are case studies or reports of views on this role.