Traditional Mexican dietary pattern and cancer risk among women of Mexican descent

Author:

Loroña Nicole C.,Santiago-Torres Margarita,Lopez-Pentecost Melissa,Garcia Lorena,Shadyab Aladdin H.,Sun Yangbo,Kroenke Candyce H.,Snetselaar Linda G.,Stefanick Marcia L.,Neuhouser Marian L.

Abstract

Abstract Purpose To examine the association of a traditional Mexican diet score with risk of total, breast, and colorectal cancer among women of Mexican ethnic descent in the Women’s Health Initiative (WHI). Methods Participants were WHI enrollees who self-identified as being of Mexican descent. Data from food frequency questionnaires self-administered at study baseline were used to calculate the MexD score, with higher scores indicating greater adherence to an a priori-defined traditional Mexican diet (high in dietary fiber, vegetables, and legumes). Incident cancers were self-reported by participants from 1993 to 2020 and adjudicated by trained physicians. We used multivariable-adjusted Cox proportional hazards models to calculate hazard ratios (HRs) and 95% confidence intervals (CIs). Results Among 2,343 Mexican descent women (median baseline age: 59 years), a total of 270 cancers (88 breast, 37 colorectal) occurred during a mean follow-up of 14.4 years. The highest tertile of MexD score was associated with a lower risk of all-cancer incidence (HR: 0.67; 95% CI 0.49–0.91; p-trend: 0.01) and colorectal cancer (HR: 0.38; 95% CI 0.14–0.998; p-trend < 0.05), with each unit increase in the MexD score associated with a 6% lower risk of all-cancer incidence (HR: 0.94; 95% CI 0.88–0.99). There was no statistically significant association with risk of breast cancer. Conclusion Consumption of a traditional Mexican diet was associated with a significantly lower risk of all-cancer incidence and colorectal cancer. Confirmation of these findings in future studies is important, given the prevalence of colorectal cancer and a growing U.S. population of women of Mexican descent.

Funder

National Institutes of Health

Cedars-Sinai Medical Center

Publisher

Springer Science and Business Media LLC

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