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| Group | Combat (n = 199) (95% CI) | Clean-up (n = 24) (95% CI) | Medical (n = 22) (95% CI) | Non-combat (n = 96) (95% CI) |
|---|---|---|---|---|
| Mean 238U/235U ratio | 138.2 (138.0 to 138.5) | 138.0 (137.3 to 138.7) | 138.1 (137.6 to 138.6) | 138.2 (137.9 to 138.5) |
| Mean uranium concentration, ng/l | 3.9 (3.4 to 4.6) | 2.7 (2.0 to 3.6) | 4.2 (2.9 to 5.9) | 3.9 (3.4 to 4.6) |
*The 238U/235U ratio for natural uranium is 137.9.
