Frequency and severity of aggressive incidents in acute psychiatric wards in Switzerland

Table 6 Odds ratios for the occurrence of severe aggressive incidents (n = 2017)

		n	Patients with severe aggressive incident (SOAS-R-Score >8)	Crude odds ratio^#
	Factor			OR (95%-CI)	p*
Gender	female	940	8.5%	(ref)
	male	1077	10.2%	1.21 (0.92–1.60)	0.18
Age¹	≤ 29 yrs.	537	10.2%	1.04 (0.75–1.43)	0.82
	30–48 yrs.	986	10.2%	(ref)
	≥ 49 yrs.	493	6.9%	0.67 (0.46–0.99)	0.04
Admission²	voluntary	1165	6.6%	(ref)
	involuntary	746	13.3%	2.16 (1.63–2.90)	<0.001
LOS	≤ 5 days	703	3.7%	0.46 (0.29–0.73)	0.002
	6–16 days	674	7.7%	(ref)
	≥ 17 days	640	17.5%	2.72 (1.96–3.77)	<0.001
Diagnosis (ICD-10)^†3	F1	503	5.6%	0.50 (0.33–0.76)	0.001
	F2	590	13.9%	2.10 (1.54–2.88)	<0.001
	F3	336	6.8%	0.68 (0.43–1.08)	0.101
	F4/6	358	5.9%	0.56 (0.35–0.90)	0.017
	Others	136	16.9%	2.16 (1.34–3.48)	0.002

^# calculated separately for each variable *wald statistic
^† calculated separately for each diagnostic category compared to all other diagnostic groups
¹ 1 missing ² 106 missing ³ 94 missing