Table 3. Final Model of the Multivariable Cox Regression Analysis.
| Terms | Hazard Ratio (95% CI) | P Value |
|---|---|---|
| Nonlinear terms | ||
| Age, y | <.001 | |
| NLR | <.001 | |
| Categorical terms | ||
| BMI | ||
| ≥25 | 1 [Reference] | |
| 18.5 to <25 | 1.42 (1.14-1.78) | .002 |
| <18.5 | 2.31 (1.56-3.44) | <.001 |
| Histology | ||
| Small cell lung cancer | 1 [Reference] | |
| Non–small cell lung cancera | 0.59 (0.41-0.86) | .01 |
| EGFR mutation status | ||
| Unknown | 1 [Reference] | |
| Positive | 0.66 (0.46-0.93) | .02 |
| Negative | 0.98 (0.66-1.45) | .91 |
| Smoking history | ||
| Never smoker | 1 [Reference] | |
| Ever smoker | 1.50 (1.24-1.83) | <.001 |
Abbreviations: BMI, body mass index (calculated as weight in kilograms divided by height in meters squared); EGFR, epidermal growth factor receptor; NLR, neutrophil to lymphocyte ratio.
a
Includes squamous cell carcinoma, adenocarcinoma, large cell carcinoma, adenosquamous carcinoma, and non–small cell carcinoma not otherwise specified.