Lifestyle and Dietary Factors in Relation to Risk of Chronic Myeloid Leukemia in the NIH-AARP Diet and Health Study
Menée à partir de questionnaires auprès de 493 188 participants dont 198 917 femmes (âge : 50 à 71 ans ; durée médiane de suivi : 10,5 ans), cette étude évalue l'association entre le mode de vie, des facteurs alimentaires et le risque de leucémie myéloïde chronique
Background: Aside from exposure to ionizing radiation and benzene, little is known about lifestyle risk factors for chronic myeloid leukemia (CML) in the general population.Methods: We examined the relation between lifestyle and dietary risk factors for CML in 493,188 participants (294,271 males and 198,917 females) aged 50 to 71 years who completed a baseline questionnaire in the National Institutes of Health-AARP Diet and Health Study in 1995 to 1996. Over a median of 10.5 years of follow-up, 178 incident cases of CML (139 males and 39 females) were ascertained from state registries. We used Cox proportional hazards models to estimate hazard ratios and 95% confidence intervals for exposures of interest, adjusting for potential confounding variables.Results: In multivariable analysis of all participants combined, female sex, years of education, and vigorous physical activity (HR for ≥3 times/week vs. <1 time/week 0.70; 95% CI, 0.49–0.99) were inversely associated with risk of CML, whereas smoking intensity (HR for smokers of ≥20 cigarettes per day vs. never smokers: 1.53; 95% CI, 1.03–2.27) and body mass (HR for BMI ≥ 30 vs. <25 kg/m2 1.46; 95% CI, 0.95–2.23) were associated with increased risk. A range of dietary factors was not associated with disease.Conclusions: This study adds to the sparse information about lifestyle factors, which affect the risk of CML in the general population.Impact: If these findings are confirmed, it would suggest that CML may be amenable to preventive strategies. Cancer Epidemiol Biomarkers Prev; 22(5); 1–7. ©2013 AACR.