Study characteristic Treatment helpful (n=16) P value Would have treatment again (n=12) P value Schedule*: Interval between treatment and interview (scale 0-3) 0.542 (0.491 to 0.597) <0.001 0.482 (0.422 to 0.551) <0.001 Complexity of interview (scale 1-4) 0.804 (0.733 to 0.880) <0.001 0.918 (0.815 to 1.035) 0.161 No of questions (scale 1-3) 0.353 (0.288 to 0.433) <0.001 0.508 (0.432 to 0.597) <0.001 Setting¶: Same hospital or treating doctor 0.861 (0.592 to 1.253) 0.435 0.727 (0.529 to 1.017) 0.063 Non-treating doctor or some at home 0.311 (0.154 to 0.629) <0.001 0.863 (0.419 to 1.773) 0.688 Collaborative 0.198 (0.137 to 0.285) <0.001 0.276 (0.146 to 0.530) <0.001 Patient led 0.124 (0.092 to 0.169) <0.001 0.090 (0.063 to 0.129) <0.001

^* Per unit increase in scale.

0=During course or maintenance electroconvulsive therapy; 1=within four weeks or predischarge; 2=1-6 months; 3=more than six months.

1=Dichotomous; 2=simple Likert scale; 3=complex Likert scale or multiple choice; 4=semistructured.

1=Five or less; 2=6-14; 3=15 or more.

^¶ Compared with inpatient.