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M. Yotsukura
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MINI 11 - Tobacco Control and Prevention (ID 108)
- Event: WCLC 2015
- Type: Mini Oral
- Track: Prevention and Tobacco Control
- Presentations: 1
- Moderators:S.M. Janes, E. Stone, K.M. Cummings
- Coordinates: 9/07/2015, 16:45 - 18:15, 601+603
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MINI11.07 - The Relationship between Smoking Status and Prognostic Factors after Surgery in Lung Cancer Patients with Chronic Obstructive Pulmonary Disease (ID 1388)
17:10 - 17:15 | Author(s): M. Yotsukura
- Abstract
Background:
Cigarette smoking is the leading cause of chronic obstructive pulmonary disease (COPD), which frequently coexists with lung cancer. For non-small cell lung cancer (NSCLC) patients with COPD, the poor prognostic factors after curative surgery and their association with smoking status are unclear.
Methods:
We enrolled 858 patients who underwent curative surgical resection for pathological stage I or II NSCLC in our institute between January 2002 and December 2012. Of these patients, those with COPD, as determined by a fixed post-bronchodilator ratio of forced expiratory volume in 1 second and forced vital capacity (FEV1/FVC) below 0.7, were evaluated (n = 302). Clinical and pathological characteristics of the patients were retrospectively analyzed using the Cox regression hazards model to determine those that serve as poor prognostic factors after surgery.
Results:
The mean follow-up time was 49.3 months (±30.8 months; range, 1 to 135 months). The five-year disease-free survival rate was 70.2%, and the overall survival rate was 81.5%. Of 302 COPD patients, 243 (80.5%) had a smoking habit, whereas 59 (19.5%) did not. According to the Global Initiative for Chronic Obstructive Lung Disease (GOLD) criterion, 143 patients (47.5%) were diagnosed with stage I COPD and 159 patients (52.6%) were diagnosed with stage II COPD. The presence of a smoking habit (p = 0.010, hazard ratio [HR] 3.340, 95% confidence interval [CI] 1.334-8.359), lymphatic permeation (p = 0.001, HR 2.352, 95% CI 1.450-3.814), pathological T2 or T3 disease (p = 0.005, HR 1.666, 95% CI 1.165-2.381), and a preoperative serum carcinoembryonic antigen (CEA) value > 0.5 ng/ml (p = 0.041, HR 1.637, 95% CI 1.021-2.625) were determined to be indicators of poor recurrence-free survival in multivariate analysis. For overall survival rates, a smoking habit (p = 0.048, HR 7.527, 95% CI 1.017-55.738), a preoperative serum CEA value > 0.5 ng/ml (p = 0.001, HR 2.782, 95% CI 1.495-5.175), a histology of squamous cell carcinoma (p = 0.014, HR 2.220, 95% CI 1.175-4.193), and pathological N1 disease (p = 0.031, HR 2.505, 95% CI 1.089-5.762) were determined to be poor prognostic indicators in multivariate analysis. The disease stage as determined by the GOLD criterion was associated with neither recurrence-free nor overall survival rates. With regard to smokers, the number of pack-years did not significantly influence prognosis.
Conclusion:
We identified poor prognostic indicators for resected NSCLC in COPD patients. It should be noted that COPD patients who did not smoke had a better prognosis after surgery than those who did. Neither the number of pack-years in smokers nor the stage of COPD was related to prognosis after surgery.
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P1.02 - Poster Session/ Treatment of Localized Disease – NSCLC (ID 209)
- Event: WCLC 2015
- Type: Poster
- Track: Treatment of Localized Disease - NSCLC
- Presentations: 1
- Moderators:
- Coordinates: 9/07/2015, 09:30 - 17:00, Exhibit Hall (Hall B+C)
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P1.02-011 - The Discordance of Two Major Diagnostic Criteria for Chronic Obstructive Pulmonary Disease Affects Lung Cancer Prognosis after Resection (ID 1250)
09:30 - 09:30 | Author(s): M. Yotsukura
- Abstract
Background:
Chronic obstructive pulmonary disease (COPD) has been reported to be associated with the development of lung cancer and poor prognosis after curative surgery for early-stage non-small cell lung cancer (NSCLC). The Global Initiative for Chronic Obstructive Lung Disease defines COPD as a fixed post-bronchodilator ratio of forced expiratory volume in 1 second and forced vital capacity (FEV1/FVC) below 0.7. Age-dependent cut-off values below the lower fifth percentile (LLN) of this ratio derived from the general population have been proposed as an alternative. In patients with obstruction according to the LLN cut-off point but not according to the fixed cut-off point, the prognosis after curative surgery for NSCLC is not known.
Methods:
We enrolled 556 patients with FEV1/FVC ≥0.7 who underwent curative surgical resection for pathological stage I or II NSCLC in our institute between January 2002 and December 2012. The post-surgical prognosis was compared between patients with obstruction (obstructed patients) and without obstruction (non-obstructed patients) according to the LLN cut-off point, using a Cox regression hazards model.
Results:
Of the 556 patients, 42 (7.6%) met the criteria of the LLN cut-off point. The 5-year recurrence-free rate was significantly lower in the obstructed patients (54.4%) than in the non-obstructed patients (77.1%), in univariate analysis (p < 0.01). The 5-year overall survival rate was also significantly lower in the obstructed patients (64.0%) than in the non-obstructed patients (91.1%), in univariate analysis (p < 0.01). Multivariate analysis showed that the obstructed patients had a poor recurrence-free (p = 0.05) and overall survival (p < 0.01) probability.
Conclusion:
Even if COPD is not diagnosed according to the fixed cut-off point, those who meet the criteria of the LLN cut-off point have a poor prognosis after curative surgery for NSCLC.
