Figure 3. The HA₂T₂ score and its association with 30‐day in‐hospital mortality.

The HA₂T₂ score is calculated as follows: hypoxia upon presentation (defined as requiring supplemental oxygenation within 3 hours of arrival in emergency department)=1 point; age=1 point if 65 to 74 years and 2 points if ≥75 years; troponin 0.34 ng/mL ≥2 points. ds indicates days.