Table 2

Results of a logistic regression analysis of emergency department admissions and mortality

	OR	95% CI		p Values
	OR	Lower limit	Upper limit	p Values
Weekdays	1
Weekends	1.42	1.40	1.43	<0.0001
Year
1999	1.00
2000	0.94	0.93	0.96	<0.0001
2001	0.95	0.93	0.97
2002	1.00	0.98	1.02
2003	1.03	1.02	1.05
2004	1.02	1.00	1.04
2005	1.05	1.03	1.07
2006	0.97	0.96	0.99
2007	0.91	0.90	0.93
2008	0.89	0.87	0.91
2009	0.81	0.80	0.83
Age group (years)
<5	0.06	0.06	0.07
5–9	0.05	0.04	0.06	<0.0001
10–14	0.05	0.05	0.07
15–19	0.11	0.10	0.12
20–24	0.12	0.11	0.13
25–29	0.15	0.14	0.16
30–34	0.24	0.22	0.25
35–39	0.39	0.37	0.41
40–44	0.62	0.59	0.65
45–49*	1
50–54	1.56	1.50	1.62
55–59	2.28	2.20	2.36
60–64	3.31	3.20	3.42
65–69	4.54	4.39	4.69
70–74	6.08	5.89	6.28
75–79	8.00	7.75	8.26
80–84	10.19	9.88	10.52
≥85	13.77	13.35	14.20
Gender
Male	1
Female	0.85	0.84	0.85	<0.0001
Socioeconomic status (quintile)
1	1
2	1.00	0.99	1.01	<0.0001
3	0.98	0.97	0.99
4	0.97	0.96	0.99
5	0.93	0.92	0.95
Number of comorbidities
None	1
1	1.24	1.23	1.26	<0.0001
2	1.34	1.32	1.35
3	0.90	0.89	0.91
4	0.50	0.49	0.51
5 or more	0.11	0.10	0.11

The adjusted OR along with lower and upper limits of the 95% CIs are shown in each row along with the significance for the test and significance for the trend within each category, if appropriate. These were derived from a logistic regression analysis. Note that this analysis includes only those admissions where complete records of all potential confounders were kept.
*Patients under theage group of 45–49 were used as the baseline group for the calculation of OR.