Table 4. Univariate analysis of CT margin-based analysis for differentiation of invasive mucinous adenocarcinoma and bacterial pneumonia.
| 1-mm CT images | P value | OR | 95% CI |
|---|---|---|---|
| 5-pixel max. slope | 0.003 | 1.02 | 1.01–1.04 |
| 7-pixel max. slope | 0.002 | 1.03 | 1.01–1.06 |
| 9-pixel max. slope | 0.003 | 1.05 | 1.02–1.08 |
| 5-pixel avg. slope | 0.003 | 1.02 | 1.01–1.03 |
| 7-pixel avg. slope | 0.003 | 1.03 | 1.01–1.05 |
| 9-pixel avg. slope | 0.003 | 1.04 | 1.01–1.07 |
Note. A decrease in slope by 1° increased the risk of bacterial pneumonia as noted odds ratio for slopes. CI, confidence interval; HU, Hounsfield unit; OR, odds ratio; max., maximal; avg., average.