Effectiveness of cognitive analytic therapy for bipolar affective disorder: A co-produced single subject cumulative treatment design with extended follow-up (A /B/A /C-FU).

Objectives: Evidence for the treatment of bipolar affective disorder with cognitive analytic therapy (CAT) is limited, and so this study sought to intensively evaluate outcomes in a co-produced single-case experimental design (SCED).

Design: An A /B/A /C with extended follow-up SCED with a female patient meeting diagnostic criteria for bipolar disorder.

Methods: Following the 6-week baseline period 'A ', treatment occurred in two phases (18 'B' and 6 sessions 'C') sandwiching a 12-week treatment withdrawal phase ('A ') and a 24-week structured follow-up phase.