Risk predictive factors for the appearing of a second primary lung neoplasms in 104 patients

The objective of our study was to identify the risks factors for the de development of a second pulmonary primary cancer. It was a primary, observational, multicentric and retrospective study with 104 patients from the Cancer National Institute and the Antonio Pedro Universitary Hospital, in Rio de Janeiro, Brazil. The sites of primary tumors were: head and neck (56.7%); with laryngeal carcinoma (42.4%); lungs (15.5%); bladder (8.6%); uterine cervix (7.6%); stomach (4.8%); others (6.8%). Male patients represented 84.6%. Average age 56.7 +/- 10.7 years, with a coefficient of variation 18.8%. Among the patients 91.4% were smokers and 92.0% were alcohol consumers. Multiple logistic regression model: site of primary tumor (OR:8.22; CI 95% - 2.21 to 30.56; p = 0,0017); specific histologic of primary cancer (OR:0.21; IC 95% : 0.04 to 0.99; p = 0.0498); sex (OR: 0.25; CI 95% : 0.03 to 1.81; p = 0.1711); age (OR: 0.98; CI 95%: 0.92 to 1.04; p = 0.6318); smoking (OR: 2.80; CI 95%: 0.44 to 17.55; p = 0.2711) and alcohol consumption (OR:0.76; CIIC 95%: 0.19 to 2.95; p = 0.6964). Adjusted model: odds ratio of the site of the primary tumor was 4.14, ; CI 95%; from 1.36 and 12.78 and p = 0.0123 (p < 0.05). Accuracy or the model: 82. 69%. In this study teh site of the primary tumor was the only predictor of risk for the second pulmonary primary cancer.