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• W2768091657 abstract "The purpose of the present study was to investigate whether low-dose computed tomography (LDCT) screening is capable of enhancing the detection rate of early-stage lung cancer and reducing lung cancer mortality rate in China, thus determining the appropriate duration of screening and identifying additional risk factors for lung cancers in Chinese population. A randomized lung cancer screening study was performed with participants aged 45 to 70 years old who had at least one high-risk factor as follows: 1) a history of cigarette smoking ≥20 pack-years; former smokers who had quit within the past 15 years; 2) cancer history in immediate family members; 3) personal cancer history; 4) professional exposure to carcinogens (asbestos, dust or radiation); 5) long history of passive smoking; or 6) long-term exposure to cooking oil fumes. Participants were randomly assigned to a screening group with alternating years of LDCT screening (R1, R2) or a control group with biennial questionnaire inquiries. A total of 6657 eligible participants were enrolled, 3145 participants were assigned to the control group and 3512 were assigned to the baseline LDCT screening (R1) group. 1516 participants (43.2%) underwent the second round of LDCT screening (R2) in the alternate year. At R1 and R2 rounds, 19.6% and 24.0% participants showed non-calcified nodules ≥4 mm on LDCT images. Among these, lung cancer was diagnosed in 44 participants (1.3%) at R1, 12 (0.8%) at R2, and 10 (0.3%) in the control group through either biopsy or cytologic analysis. The proportions of early-stage (0 to I) lung cancer were 97.7% at R1, 91.7% at R2 and 20% in the control group, respectively. At R1, the sensitivity of LDCT for lung cancer screening was 97.7%, the specificity was 76.8%, the positive predictive value was 5.1%, and the negative predictive value (NPV) was 99.9%; at R2, both the sensitivity and the negative predictive value increased to 100%. Two cases of lung cancer-specific deaths occurred in the control group, but no death occurred in the LDCT group. Compared to usual care, the two biennial screenings with LDCT led to a 77.7% increase at R1 and 71.7% at R2 in detecting early-stage lung cancer and a 20% decrease in lung cancer mortality. Biennial screening may be at least as efficient as annual screening in terms of detecting rate, sensitivity and NPV. This study provides insights about the non-smoking related risk factors of lung cancer in the Chinese population." @default.
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• W2768091657 date "2017-11-01" @default.
• W2768091657 modified "2023-10-03" @default.
• W2768091657 title "MA 14.07 Randomized Lung Cancer Screening with Low-Dose CT in China: A Specific Risk-Based Screening for Chinese Population" @default.
• W2768091657 doi "https://doi.org/10.1016/j.jtho.2017.09.577" @default.
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