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Figure 1 Odds ratios and 95% confidence intervals for 30-day mortality, adjusted for baseline characteristics and excluding deaths within 24 h, for selected patient subgroups who received intravenous and oral atenolol vs. oral atenolol alone. Hypertension was defined as systolic blood pressure  140 mm Hg or pulse 90 at enrollment, with Killip class I. Low-risk was defined as location of infarction other than anterior, Killip class I or II, heart rate  100, age 70 years, no atrial fibrillation and no previous infarction at enrollment (8). "Treated within 2 hours" refers to thrombolytic therapy.
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