Background: Risk factors for development of lung cancer include a family history of the disease. The effect of family history on lung cancer outcomes is unknown. A study was conducted to investigate this.
Methods: The medical records of all patients with lung cancer seen in an academic medical oncology lung cancer clinic between 1999 and 2006 were reviewed for outcomes and family history of lung cancer. chi(2)-test and Wilcoxon test were used for univariate comparisons, while Cox Proportional Hazards regression analysis was used to evaluate the adjusted risk of death. Univariate probability of survival was computed using Kaplan-Meier estimate and compared using the log-rank test.
Results: Of the 560 patients evaluated, 289 (51%) were male and 519 (93%) had a smoking history. Of the 148 patients (26%) with a family history of lung cancer, 115 had an affected first-degree relative. No association between family history and histology or stage at diagnosis was detected. Median survival in patients with a family history of lung cancer was 53 months compared to 58 months in patients without such a history (p=0.06). Patients with a positive family history had an adjusted relative risk of death of 1.65 (95% CI: 1.07-2.56; p=0.02) compared to those without a family history. This risk was especially increased in those with an affected first-degree relative (RR: 1.72; 95% CI: 1.08-2.75, p=0.02).
Conclusions: Lung cancer patients with a first-degree relative with lung cancer have a poorer outcome than those without such a history.
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| http://dx.doi.org/10.1016/j.lungcan.2008.04.008 | DOI Listing |
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