Non-ST-segment elevation myocardial infarction is often scored by age, heart rate, systolic blood pressure, blood creatinine concentration, Killip classification, and risk factors using the GRACE scale. Age is generally 0 if less than 30, with higher scores as age increases. Systolic blood pressure is highest when it is less than 80 mmHg and decreases with increasing systolic blood pressure. The score also increases with increasing creatinine concentration in the blood, and the higher the Killip classification on the GRACE scale, the higher the score. The score also rises with ST changes on the ECG and cardiac arrest. The total score is the sum of the above, with scores totaling no more than 108 being in the low-risk category, 109-140 being intermediate risk, and higher than 140 being high-risk. The risk of in-hospital death rises as the risk level rises. The first assessment should usually be performed within one day of admission and again before discharge to determine prognosis.