| DWI Volume |
| ≤15 cc = 0 points |
| > 15 cc = 1 point |
| Age |
| ≤ 55 years = 0 points |
| 56–69 years = 1 point |
| 70–79 years = 2 points |
| ≥ 80 years = 3 points |
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