Table 2.
Characteristic | Unadjusted OR (95% CI) | P Value | Adjusteda OR (95% CI) | P Value |
---|---|---|---|---|
Age, y | 0.97 (0.97–0.98) | <0.001 | 0.98 (0.97–0.99) | <0.001 |
Women | 0.78 (0.71–0.86) | <0.001 | 0.89 (0.81–0.99) | 0.03 |
Race | ||||
Black | 1.06 (0.92–1.23) | 0.42 | 1.14 (0.98–1.33) | 0.09 |
White | 1.00 [Reference] | 1.00 [Reference] | ||
Other/unknown | 1.12 (0.98–1.28) | 0.08 | 0.97 (0.82–1.14) | 0.71 |
Disease state | ||||
Diabetes mellitus | 1.40 (1.23–1.60) | <0.001 | 1.11 (0.93–1.33) | 0.25 |
Renal insufficiency | 0.68 (0.62–0.76) | <0.001 | 1.03 (0.89–1.20) | 0.68 |
Medical history | ||||
Anemia | 0.77 (0.69–0.87) | <0.001 | 0.96 (0.85–1.08) | 0.50 |
Atrial fibrillation | 1.07 (0.97–1.17) | 0.19 | 1.01 (0.92–1.12) | 0.80 |
Chronic obstructive pulmonary disease | 0.94 (0.85–1.04) | 0.22 | 0.91 (0.82–1.01) | 0.08 |
Depression | 1.00 (0.86–1.17) | 0.96 | 1.00 (0.85–1.17) | 0.99 |
Heart failure with ischemic etiology | ||||
No | 1.00 [Reference] | 1.00 [Reference] | ||
Yes | 1.28 (1.16–1.41) | <0.001 | 1.08 (0.97–1.19) | 0.16 |
Missing | 1.09 (0.89–1.33) | 0.42 | 0.97 (0.79–1.20) | 0.78 |
Hyperlipidemia | 1.09 (0.99–1.19) | 0.08 | 1.03 (0.93–1.14) | 0.61 |
Hypertension | 0.86 (0.76–0.96) | 0.01 | 0.94 (0.83–1.06) | 0.32 |
Implantable cardioverter‐defibrillator | 1.97 (1.72–2.25) | <0.001 | 1.37 (1.18–1.58) | <0.001 |
Pacemaker | 1.11 (0.99–1.25) | 0.08 | 0.96 (0.85–1.09) | 0.50 |
Peripheral vascular disease | 0.80 (0.71–0.92) | 0.001 | 0.80 (0.70–0.92) | 0.002 |
Vital signs at admission | ||||
Smoker in the past y | 1.19 (1.02–1.38) | 0.02 | 1.00 (0.86–1.18) | 0.96 |
Heart rate | 1.01 (1.00–1.01) | <0.001 | 1.00 (1.00–1.01) | 0.007 |
Respiratory rate ≥30 breaths/min | 0.73 (0.59–0.91) | 0.005 | 0.74 (0.59–0.93) | 0.01 |
Tests at admission/discharge | ||||
Systolic blood pressure | 0.99 (0.99–0.99) | <0.001 | 1.00 (0.99–1.00) | <0.001 |
Reduced ejection fractionb | 2.61 (2.38–2.87) | <0.001 | 2.34 (2.11–2.59) | <0.001 |
Serum creatinine | 0.66 (0.62–0.70) | <0.001 | 0.66 (0.61–0.71) | <0.001 |
Serum potassium | 0.86 (0.78–0.95) | 0.002 | 1.00 (0.90–1.11) | 0.98 |
Serum urea nitrogen | 0.99 (0.99–0.99) | <0.001 | 1.00 (1.00–1.00) | 0.87 |
Discharge year | ||||
2005 | 0.90 (0.69–1.18) | 0.46 | 0.78 (0.58–1.05) | 0.10 |
2006 | 0.77 (0.65–0.92) | 0.004 | 0.68 (0.55–0.84) | <0.001 |
2007 | 0.66 (0.54–0.79) | <0.001 | 0.58 (0.47–0.73) | <0.001 |
2008 | 0.60 (0.49–0.73) | <0.001 | 0.52 (0.41–0.66) | <0.001 |
2009 | 0.67 (0.55–0.81) | <0.001 | 0.63 (0.50–0.78) | <0.001 |
2010 | 0.67 (0.56–0.81) | <0.001 | 0.63 (0.50–0.78) | <0.001 |
2011 | 0.88 (0.74–1.05) | 0.15 | 0.86 (0.69–1.05) | 0.14 |
2012 | 1.10 (0.92–1.32) | 0.28 | 1.05 (0.86–1.29) | 0.63 |
2013 | 1.00 [Reference] | 1.00 [Reference] |
CI indicates confidence interval; MRA, mineralocorticoid receptor antagonist; OR, odds ratio.
Adjustment variables detailed in the Methods section.
Reduced ejection fraction is defined as documentation of a left ventricular ejection fraction of 35% or less, or a qualitative assessment of moderate or severe left ventricular systolic dysfunction.