1) What is your understanding of the term difficult-to-treat-depression (DTTD)?

2) What is your understanding of other terms; viz: treatment-resistant depression treatment-refractory depression, treatment-resistant major depressive disorder and major depressive disorder?

3) What are your experiences of diagnosing DTTD?

4) What are your experiences of managing DTTD?

5) Does your management of these patients include:

a) using an illness management model or a chronic illness [23] ;

b) communication with GPs;

c) referring the patient to allied health professionals, and

d) suggesting/prescribing non-pharmacological and/or complementary treatment?

6) If “no” to any of Question 5, have you ever considered using any of these options/other comments?