Table 2. Odds of death within 30 days of admission for hospitalized patients with a primary diagnosis of pneumonia*.

Variable	No. deaths (%)	Adjusted odds ratio† (95% CI)
Year (April to March)
1997–98	17,743 (24.8)	1.00
1998–99	22,152 (27.2)	1.07 (1.05–1.10)
1999–2000	22,425 (28.2)	1.07 (1.04–1.10)
2000–01	19,392 (26.1)	0.94 (0.92–0.97)
2001–02	22,198 (26.5)	0.93 (0.90–0.95)
2002–03	23,352 (26.2)	0.89 (0.87–0.91)
2003–04	25,946 (26.7)	0.88 (0.86–0.90)
2004–05	25,379 (25.0)	0.80 (0.78–0.82)
Age, y
<65	13,576 (5.6)	1.00
65–74	25,349 (25.1)	4.34 (4.25–4.44)
75–84	67,526 (37.0)	7.77 (7.61–7.93)
>85	72,136 (47.2)	12.81 (12.55–13.08)
Sex
M	87,132 (25.2)	1.00
F	91,455 (27.6)	0.97 (0.96–0.98)
Comorbidity index
None	63,254 (16.9)	1.00
Mild	54,030 (31.9)	1.59 (1.56–1.61)
Moderate	33,598 (42.9)	2.47 (2.42–2.51)
Severe	27,705 (50.1)	3.72 (3.65–3.80)

*Results from a multivariable logistic regression. CI, confidence interval.
†Model includes year, age, sex, and coexisting conditions.