Table 2.

Stepwise logistic regression analysis of variables associated with seizures after citalopram overdose. Variables not retained in the model were male, acute ethanol co-ingestion, chronic ethanol consumption, co-ingestion of benzodiazepines, co-ingestion of other drugs, activated charcoal administration, hyponatraemia and QTc

Variables included	Coefficient	Odds ratio (95% CI)	P value
Constant	−1.02
Age (10 years increment)	−0.54	0.6 (0.3 to 1.0)	0.042
Citalopram dose (100 mg increment)	0.09	1.1 (1.0 to 1.2)	0.036
Co-ingested tricyclic antidepressant or venlafaxine	2.44	15.1 (3.0 to 75.3)	0.001
Co-ingested other drugs*	−1.87	0.1 (0.0 to 0.7)	0.013

^*Excluding benzodiazepines.