Determinants of mechanical restraint in an acute psychiatric care unit

Table 3 Basic demographic and clinical characteristics of the study sample according to median hours of restraint (univariate analysis)

	n (%)	Restraint duration		Statistical
		Median	IQR	Z, χ2	P value
Age				(r) 0.027	0.768
Sex				(Z) - 2.856	0.004
Male	65 (54.6)	19.28	11.30-34.13
Female	54 (45.4)	12.61	6.53-20.03
Diagnosis				(χ2) 6.488	0.090
Psychotic disorder	99 (83.2)	17.48	9.13-29.75
Depressive disorder	4 (3.4)	5.05	2.92-7.86
SAD	5 (4.2)	11.77	7.98-18.37
Others	11 (9.2)	13.10	8.88-28.92
Language barrier				(Z) - 0.819	0.413
No	86 (72.3)	15.68	7.98-29.27
Yes	33 (27.7)	18.70	9.70-24.57

IQR: Interquartile range; Z: Statistical value of U of Mann-Whitney; r: Spearman's statistical value; SAD: Substance abuse disorders.