Predictors of Time to Relapse/Recurrence after Electroconvulsive Therapy in Patients with Major Depressive Disorder: A Population-Based Cohort Study

Table 3

Univariate Cox regression analyses of the influence of treatment factors on hospitalisation or suicide during followup.

		Hazard ratio (HR)	95% Confidence interval (CI)	𝑃
Type of care	Outpatient (𝑛=119) versus inpatient (𝑛=367)	0.43	0.29–0.64	<0.001
	Involuntary (𝑛=63) versus voluntary (𝑛=423)	1.01	0.66–1.55	0.95
Patients with psychotic features	Antipsychotics (𝑛=54) versus no Antipsychotics (𝑛=42)	0.76	0.39–1.49	0.43
Patients without psychotic features	Antipsychotics (𝑛=81) versus no Antipsychotics (𝑛=293)	1.99	1.41–2.82	<0.001
Lithium treatment during followup	Lithium (𝑛=50) versus no Lithium (𝑛=429)	0.51	0.29–0.92	0.03
Benzodiazepines during followup	Benzodiazepines (𝑛=99) versus no Benzodiazepines (𝑛=380)	1.43	1.03–1.99	0.03
Continuation ECT during followup	Continuation ECT (𝑛=59) versus no Continuation ECT (𝑛=427)	0.83	0.53–1.30	0.42