Table 3.

Potential factors associated with early (less than 72 h) ED-visit or readmission.

	Early ED-visit		Early readmission
	Crude HR	Adjusted HR (#)	Crude HR	Adjusted HR (#)
Age, in years *	1.15 (95 %CI 1.13−1.17) p < 0.001	1.06 (95 %CI 1.04−1.10) p < 0.001	1.36 (95 %CI 1.32−1.42) p < 0.001	1.18 (95 %CI 1.14−1.23) p < 0.001
Male gender	1.27 (95 %CI 1.18−1.37) p < 0.001	1.14 (95 %CI 1.06−1.24) p = 0.001	1.27 (95 %CI 1.13−1.43) p < 0.001	1.05 (95 %CI 0.93−1.19)p = 0.370
Charlson ** comorbidity index	1.25 (95 %CI 1.22−1.27) p < 0.001	1.16 (95 %CI 1.13−1.20)p < 0.001	1.40 (95 %CI 1.36−1.44)p < 0.001	1.25(95 %CI 1.21−1.30)p < 0.001
COPD	1.61 (95 %CI 1.4−18.4) p < 0.001	0.92(95 %CI 0.80−1.06)p = 0.285	2.14(95 %CI 1.77−2.58)p < 0.001	0.92(95 %CI 0.75−1.20)p = 0.412
Social service requirement	1.65 (95 %CI 1.36−1.99) p < 0.001	1.06 (95 %CI 0.87−1.30) p=0.512	2.79 (95 %CI 2.19−3.55) p < 0.001	1.28 (95 %CI 1.00–1.66) p = 0.049
Non-scheduled First-H	1.66 (95 %CI 1.54−1.8) p < 0.001	1.39 (95 %CI 1.28−1.50) p < 0.001	2.78 (95 %CI 2.43−3.19) p < 0.001	2.06 (95 %CI 1.78−2.37) p < 0.001
Critical care requirement	1.51 (95 %CI 1.39−1.65) p < 0.001	1.12 (95 %CI 1.02−1.23) p=0.010	1.62 (95 %CI 1.42−1.85) p < 0.001	1.03 (95 %CI 0.9−1.2) p = 0.581
Prior admissions	1.1 (95 %CI 1.07−1.13) p < 0.001	1 (95 %CI 0.96−1.03) p = 0.929	1.17 (95 %CI 1.14−1.21) p < 0.001	1.07 (95 %CI 1.02−1.11) p < 0.001
Prior ED-visits	1.08 (95 %CI 1.07−1.09) p < 0.001	1.08(95 %CI 1.06−1.08)p < 0.001	1.08(95 %CI 1.07−1.09) p < 0.001	1.05 (95 %CI 1.03−1.07) p < 0.001
Length of stay, in days	1 (95 %CI 1.01−1.02) p < 0.001	1 (95 %CI 1.01–1.02) p < 0.001	1.01 (95 %CI 1.01−1.02) p < 0.001	1 (95 %CI 1−1.01) p < 0.001
Long hospital stay (over 5 days)	1.9 (95 %CI 1.76−2.06) p < 0.001	1.39(95 %CI 1.27−1.52)p < 0.001	3,02 (95 % CI 2,69−3,40)p < 0,001	1.75 (95 %CI 1.53−2) p < 0.001

(#)Adjustment for other significant covariates.

*HR for an increase in 10 years old.

**HR with each increase in one unit of the Charlson comorbidity index.