Flow chart of study inclusion. CGI-I, Clinical Global Impressions – Improvement Scale; CGI-S, Clinical Global Impressions – Severity Scale; ECT, electroconvulsive therapy; Q-ECT Swedish National Quality Register for ECT; NPR, Swedish National Patient Register.
Retrospective Study of Unipolar Depression Treated with ECT
Corresponding Organization : Karolinska Institutet
Other organizations : Uppsala University, Örebro University, Stockholm Health Care Services
Variable analysis
- Age (≥18 years)
- Treatment for a unipolar, non-psychotic depressive episode (ICD-10 codes of F32 for depressive episode or F33 for recurrent depression, excluding F32.3 and F33.3 for psychotic depression)
- Receiving at least one ECT session as part of a first-time, index ECT series in Sweden between 1 January 2011 and 31 December 2017
- Clinical Global Impressions – Improvement Scale (CGI-I) score
- Patients with any registered lifetime diagnosis of bipolar disorder, manic or hypomanic episode, psychotic disorder or dementia were excluded
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