Prognosis tools for short-term adverse events in older emergency department users: result of a Québec observational prospective cohort

Table 2 Linear and logistic regression models showing the association of the length of stay in emergency department and hospital as well as the hospital admission (dependent variable with separated model for each variable) with PRISMA-7 and ER² risk (independent variable) adjusted on place of living and reasons for emergency department visit (n = 1905)

Dependent variable	Independent variable		Linear Regression^{a, b}			Logistic Regression^{a, b, c}
Dependent variable	Independent variable		β	[95%CI]	P-Value	OR	[95%CI]	P-Value
Length of stay in emergency Department in hours	PRISMA-7 risk	High	2.28	[1.04;3.51]	≤0.001	1.57	[1.29;1.91]	≤0.001
	PRISMA-7 risk	Low	−2.28	[−3.51;-1.04.]	≤0.001	0.64	[0.52;0.77]	≤0.001
	ER² risk	Low	−4.11	-[−5.38;-2.83]	≤0.001	0.58	[0.47;0.72]	≤0.001
		Moderate	1.09	[−2.19;4.38]	0.514	0.97	[0.58;1.62]	0.903
		High	3.84	[2.58;5.09]	≤0.001	1.69	[1.38;2.07]	≤0.001
Length of stay in Hospital in days	PRISMA-7 score	Abnormal	3.21	[0.89;5.54]	0.007	1.48	[1.12;1.96]	0.006
	PRISMA-7 score	Normal	−3.21	[−5.54;-0.89]	0.007	0.68	[0.51;0.90]	0.006
	ER² risk level	Mild	−5.17	[−7.63;-2.72]	≤0.001	0.49	[0.36;0.68]	≤0.001
		Moderate	−2.31	[−8.14;3.52]	0.438	0.62	[0.29;1.33]	0.218
		High	5.31	[2.92;7.70]	≤0.001	2.10	[1.55;2.85]	≤0.001
Hospital admission	PRISMA-7 score	Abnormal		–		1.32	[1.01;1.58]	0.003
	PRISMA-7 score	Normal				0.76	[0.63;0.91]	0.003
	ER² risk level	Mild		–		0.59	[0.48;0.71]	≤0.001
		Moderate		–		1.17	[0.72;1.91]	0.516
		High		–		1.64	[1.36;1.98]	≤0.001

PRISMA-7: “Program of Research on the Integration of Services for the Maintenance of Autonomy”; ER²: Emergency Room evaluation and recommendation; β: Coefficient of regression beta; OR: Odd ratio; HR: Hazard ratio; CI: Confident interval; ^aModel adjusted on place of living and reasons for emergency department visit; ^bSeparated model for each risk level; ^cTo be in the highest tertile with a length of stay in emergency Department > 26.9 h and in hospital > 13 days; P-values significant (i.e., < 0.05) in bold

ISSN: 1471-2318