Genotype | Risk for emphysema | True plasma level, micromol/L (SI units) | Commercial standard plasma level, mg/dL |
MM (normal) | No increase | 20 to 48 | 80 to 220 |
MZ | Possible mild increase | 17 to 33 | 90 to 210 |
SS | No increase | 15 to 33 | 100 to 200 |
SZ* | Mild increase (20 to 50 percent) | 8 to 16 | 75 to 120¶ |
ZZ | High risk (80 to 100 percent) | 2.5 to 7 | 20 to 45 |
Null | High risk (100 percent by age 30) | 0 | 0 |
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