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Association between smoking index and initial T stage.
| Group | Number of patients | % |
|---|---|---|
| Smoking index ≥600 | 175 | |
| T1 and T2 stage tumor | 112 | 64.0 |
| T3 and T4 stage tumor | 63 | 36.0 |
| Smoking index <600 | 134 | |
| T1 and T2 stage tumor | 95 | 70.9 |
| T3 and T4 stage tumor | 39 | 29.1 |
