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Comparison of Mean Computed Tomography Attenuation in the 2 Age Cohorts at Different Thresholds.
| <65 years (n = 112), % | ≥65 years (n = 105), % | P value | |
|---|---|---|---|
| ≤110 HU (90% specificity) | 7 (7.1) | 31 (29.5) | 1.6 × 10−5 |
| ≤135 HU (balanced sensitivity and specificity) | 18 (16.1) | 56 (53.3) | 6.2 × 10−9 |
| ≤160 HU (90% sensitivity) | 39 (34.8) | 74 (70.5) | 7.4 × 10−9 |
