Asthma and Risk of Death from Lung Cancer: NHANES II Mortality Study

医学 肺癌 哮喘 慢性支气管炎 相对风险 内科学 风险因素 癌症 比例危险模型 支气管炎 置信区间
作者
David W. Brown,Karen E. Young,Robert F. Anda,Wayne H. Giles
出处
期刊:Journal of Asthma [Informa]
卷期号:42 (7): 597-600 被引量:46
标识
DOI:10.1080/02770900500216234
摘要

Although smoking is the most important risk factor for lung cancer, nearly 10% of lung cancer is not attributable to smoking. Insights into risk factors for lung cancer other than smoking will become increasingly important, given decreasing trends in the prevalence of smoking. Prior research suggests asthma may increase the risk of lung cancer, particularly among nonsmokers.We used Cox regression analyses of data from a nationally representative sample of 9087 adults aged 30-75 years included in the NHANES II Mortality Study (1976-1992) to estimate the relative risk (RR) of death from lung cancer associated with self-reported asthma, independent of smoking.Age-adjusted prevalence of smoking was 36.0%, and the age-adjusted prevalence of asthma was 6.1% (6.2% among nonsmokers) at baseline. During approximately 17 years of follow-up, 196 adults died of lung cancer (ICD-9 160-165). Among 6144 nonsmokers, the RR of lung cancer death comparing adults with asthma to those without was 1.69 (95% CI: 0.94-3.04) although the association was not statistically significant. For nonsmokers without a history of cancer, the RR was 2.53 (95% CI: 1.42-4.52). After exclusion of adults with emphysema and chronic bronchitis, the RR of lung cancer death associated with asthma was 3.54 (95% CI: 1.93-6.42).Consistent with prior reports, we observed an increased risk of lung cancer mortality associated with asthma among nonsmokers without a history of cancer.
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