Table 4.

Risk factors related to re-admission: multivariate logistic regression

	OR	95% CI	p-value
Sex (ref. female)
Male	0.60	0.43–0.84	.003
Age at first admission	0.99	0.99–0.99	.008
Ratio of actual weight to ideal body weight (thinness index)	0.99	0.98–0.99	<.001
Charlson Comorbidity Index	1.28	1.12–1.38	<.001
Hospital type (ref. non-university)
University	1.47	1.30–1.67	<.001
Use of catecholamine	1.90	1.19–3.03	.007
Use of atropine	0.67	0.29–1.54	.341
Other psychological disorders
Anxiety disorder	1.94	1.60–2.36	<.001
Mood disorder	1.76	1.47–2.09	<.001
Schizophrenia	2.58	2.09–3.19	<.001
Binge eating and purging	32.60	19.7–54.10	<.001
Psychotherapy	2.56	2.01–3.26	<.001
Intravenous hyperalimentation	1.99	1.75–2.26	<.001
Major surgery	1.87	0.85–4.15	.123
General anaesthesia	2.12	1.28–3.52	.004
Blood transfusion	0.70	0.45–1.10	.122
Use of anti-arrhythmia agents	1.98	0.94–4.17	.072