Fig. 1.

Treatment self-regulation questionnaire. Questions 1 through 6 assess autonomous regulation; questions 7 through 12 assess controlled regulation; and questions 13 through 14 assess amotivation. Patients were excluded if they give an answer of >4 to any of the amotivational items or if the relative autonomy index (defined as average of answers for the first 6 autonomous items – average of answers for the second 6 controlled items) is <0.