TABLE 2.
Univariate Cox Regression Analysis
| Characteristic | Estimate | 95% CI | P |
|---|---|---|---|
| Age | 0.040 | 0.02, 0.05 | <0.0001* |
| Smoking | −0.200 | −0.39, −0.03 | 0.0218* |
| Sex | 0.150 | 0.03, 0.26 | 0.0112* |
| Race | 0.1134 | ||
| White | 0.056 | −0.17, 0.32 | |
| Black | 0.273 | 0.01, 0.556 | |
| Histology | 0.1735 | ||
| Adenocarcinoma | −0.051 | −0.26, 0.15 | |
| NSCLC | 0.072 | −0.11, 0.26 | |
| SCC | 0.203 | −0.01, 0.41 | |
| Stage | −0.070 | −0.19, 0.05 | 0.263 |
| Treatment | 0.0154* | ||
| Surgery | −0.100 | −0.2, 0.05 | |
| Radiation | 0.250 | 0.08, 0.42 | |
| Time to scan | −0.001 | −0.01, 0.002 | 0.4647 |
| Clinical suspicion | −0.060 | −0.18, 0.05 | 0.2669 |
| PET result | −0.290 | −0.41, −0.18 | <0.0001* |
*
Significant variables.
NSCLC = non–small cell lung cancer; SCC = squamous cell carcinoma.