Table 2. Multivariate regression analysis of factors affecting SPNs.
| Factor | Regression coefficient | Standard error | P | Odds ratio (95% confidence interval) |
|---|---|---|---|---|
| Age | 0.111 | 0.020 | 0.000 | 1.117 (1.075-1.161) |
| Smoking history | 1.009 | 0.391 | 0.010 | 2.744 (1.276-5.901) |
| Nodule diameter | 2.597 | 0.427 | 0.000 | 13.420 (5.807-31.013) |
| Spiculation | 1.056 | 0.467 | 0.024 | 2.874 (1.151-7.175) |
| Clear border | −1.258 | 0.408 | 0.002 | 0.284 (0.128-0.632) |
| Cyfra21-1 (ng/mL) | 1.184 | 0.250 | 0.000 | 3.267 (2.001-5.333) |
| Constant | −14.417 | 1.858 | 0.000 | 1.117 (1.075-1.161) |
SPNs, solitary pulmonary nodules.