Table 6. Risk factors for in-hospital death.

Variable		Univariate analysis			Multivariate analysis
		RR	95% CI	p-valuea	Adj. RR	95% CI	p-valuea
Age (years)	<70	1	-	-	1	-	-
	70–80	2.12	0.611–7.35	0.236	1.99	0.57–6.96	0.281
	>80	5.69	1.77–18.3	0.004	5.08	1.56–16.5	0.007
Sex	Male	1	-	-	1	-	-
	Female	0.99	0.57–1.73	0.981	1.17	0.67–2.04	0.587
Living condition	At home	1	-	-	1	-	-
	Institutionalized	1.82	0.85–3.93	0.124	0.61	0.25–1.45	0.264
Charlson Comorbidity Index ≥1		4.69	2.52–8.75	<0.001	4.94	2.48–9.84	<0.001
Number of diagnoses at admission
	≤5	1	-	-	1	-	-
	6–8	1.71	0.73–3.99	0.216	0.95	0.41–2.35	0.924
	≥9	1.72	0.74–3.97	0.201	0.91	0.37–2.21	0.839
Number of drugs at admission
	≤2	1	-	-	1	-	-
	3–5	1.60	0.64–3.99	0.308	1.12	0.46–2.68	0.807
	6–7	1.57	0.58–4.23	0.370	0.97	0.37–2.55	0.959
	≥8	1.66	0.66–4.20	0.282	0.73	0.27–1.93	0.530
Hospital stay (days), for each additional week		1.04	0.76–1.42	0.791	0.85	0.57–1.27	0.432
Intervention (checklist)		0.66	0.37–1.15	0.142	0.73	0.43–1.26	0.269

RR: risk ratios. CI: confidence interval. Adj. RR: adjusted risk ratios for all variables listed.

^aPoisson regression models with a robust error variance, Likelihood Ratio Test.