Table 2. Multivariable Cox Proportional Hazard Interval-Censored Regression Analysis of Factors Associated With Overall Survival Limited-Stage Small Cell Lung Cancer.
| Variable | Events, No./patients, No. | HR (95% CI) | P value |
|---|---|---|---|
| Age, y | |||
| 30-59 | 146/188 | 1 [Reference] | <.001 |
| ≥ 60 | 802/944 | 1.55 (1.28-1.88) | |
| Eastern Cooperative Oncology Group performance status | |||
| 0 | 297/357 | 1 [Reference] | .004 |
| 1-4 | 651/775 | 1.24 (1.07-1.44) | |
| Stage | |||
| I | 109/135 | 1 [Reference] | NA |
| II | 137/162 | 0.99 (0.77-1.26) | .91 |
| III | 702/835 | 1.14 (0.93-1.40) | .20 |
| Treatment | |||
| Cisplatin | 513/613 | 1 [Reference] | .95 |
| Carboplatin | 435/519 | 0.995 (0.86-1.15) |
Abbreviation: HR, hazard ratio.