Q J Wu1, L Xie2, W Zheng3, E Vogtmann4, H L Li2, G Yang3, B T Ji5, Y T Gao6, X O Shu3, Y B Xiang7. 1. Department of Epidemiology, School of Public Health, Fudan University, Shanghai; State Key Laboratory of Oncogene and Related Genes, Shanghai Cancer Institute, Shanghai; Department of Epidemiology, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China. 2. State Key Laboratory of Oncogene and Related Genes, Shanghai Cancer Institute, Shanghai; Department of Epidemiology, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China. 3. Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville. 4. Department of Epidemiology, University of Alabama at Birmingham, Birmingham. 5. Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, USA. 6. Department of Epidemiology, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China. 7. State Key Laboratory of Oncogene and Related Genes, Shanghai Cancer Institute, Shanghai; Department of Epidemiology, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China. Electronic address: ybxiang@shsci.org.
Abstract
BACKGROUND: Epidemiological studies evaluating the association between cruciferous vegetables (CVs) intake and female lung cancer risk have produced inconsistent results. PATIENTS AND METHODS: This study followed 74 914 Chinese women aged 40-70 years who participated in the Shanghai Women's Health Study. CV intake was assessed through a validated food-frequency questionnaire (FFQ) at baseline and reassessed during follow-up. Hazard ratios (HRs) and 95% confidence interval (CIs) were estimated by using Cox proportional hazards models. Furthermore, we carried out a meta-analysis of all observational studies until December 2011. RESULTS: After excluding the first 2 years of follow-up, 417 women developed lung cancer over a mean of 11.1 years of follow-up. An inverse association of borderline statistical significance was observed between CV consumption and female lung cancer risk, with HR for the highest compared with the lowest quartiles of 0.73 (95% CI 0.54-1.00, P trend = 0.1607). The association was strengthened in analyses restricting to never smokers, with the corresponding HR of 0.59 (95% CI 0.40-0.87, P trend = 0.0510). The finding of an inverse association between CV intake and lung cancer risk in women was supported by our meta-analysis of 10 included studies. CONCLUSIONS: Our study suggests that CV consumption may reduce the risk of lung cancer in women, particularly among never smokers.
BACKGROUND: Epidemiological studies evaluating the association between cruciferous vegetables (CVs) intake and female lung cancer risk have produced inconsistent results. PATIENTS AND METHODS: This study followed 74 914 Chinese women aged 40-70 years who participated in the Shanghai Women's Health Study. CV intake was assessed through a validated food-frequency questionnaire (FFQ) at baseline and reassessed during follow-up. Hazard ratios (HRs) and 95% confidence interval (CIs) were estimated by using Cox proportional hazards models. Furthermore, we carried out a meta-analysis of all observational studies until December 2011. RESULTS: After excluding the first 2 years of follow-up, 417 women developed lung cancer over a mean of 11.1 years of follow-up. An inverse association of borderline statistical significance was observed between CV consumption and female lung cancer risk, with HR for the highest compared with the lowest quartiles of 0.73 (95% CI 0.54-1.00, P trend = 0.1607). The association was strengthened in analyses restricting to never smokers, with the corresponding HR of 0.59 (95% CI 0.40-0.87, P trend = 0.0510). The finding of an inverse association between CV intake and lung cancer risk in women was supported by our meta-analysis of 10 included studies. CONCLUSIONS: Our study suggests that CV consumption may reduce the risk of lung cancer in women, particularly among never smokers.
Entities:
Keywords:
cruciferous vegetable; lung cancer; meta-analysis; prospective study; women
Authors: Yunfei Wang; Margaret R Spitz; Matthew B Schabath; Francis Ali-Osman; Hilario Mata; Xifeng Wu Journal: Lung Cancer Date: 2003-04 Impact factor: 5.705