Table 3.
Risk Score
| Variable | β | Score |
|---|---|---|
| Age (continuous) | 0.022 | …a |
| Age, y | ||
| >50 to ≤70 | …b | 1.5 |
| >70 to ≤80 | …b | 2.5 |
| >80 | …b | 3 |
| Female sex | 0.404 | 1 |
| Initial creatinine, mg/dL | ||
| 1.4 to 2.2 | 0.589 | 1.5 |
| >2.2 | 1.083 | 3 |
| Initial calcium <7.5 mg/dL | 0.933 | 2 |
| Initial CPK >40 000 U/L | 0.805 | 2 |
| Origin not seizures, syncope, exercise, statins, or myositis |
1.301 | 3 |
| Initial phosphate, mg/dL | ||
| 4.0 to 5.4 | 0.565 | 1.5 |
| >5.4 | 1.221 | 3 |
| Initial bicarbonate <19 mEq/L | 0.811 | 2 |
Abbreviation: CPK, creatine phosphokinase.
SI conversion factors: See Table 2.
a
Age is categorical, therefore there is no value.
b
Age is continuous, therefore there is no value.