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Park SY, Kang M, Wilkens LR, Shvetsov YB, Harmon BE, Shivappa N, Wirth MD, Hébert JR, Haiman CA, Le Marchand L, Boushey CJ. The Dietary Inflammatory Index and All-Cause, Cardiovascular Disease, and Cancer Mortality in the Multiethnic Cohort Study. Nutrients 2018; 10:E1844. [PMID: 30513709 PMCID: PMC6315679 DOI: 10.3390/nu10121844] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 11/21/2018] [Accepted: 11/26/2018] [Indexed: 12/21/2022] Open
Abstract
Diet quality based on inflammatory potential, assessed by the Dietary Inflammatory Index (DII®), has been related to mortality, but studies from racially/ethnically diverse populations are scarce. Using data from the Multiethnic Cohort Study in Hawaii and California, we investigated the association of the DII with all-cause, cardiovascular disease (CVD) and cancer mortality, both overall and by race/ethnicity. The analysis included 150,405 African Americans, Native Hawaiians, Japanese Americans, Latinos, and Whites aged 45⁻75 years, with 47,436 deaths during an average follow-up of 18.2 ± 4.9 years. In multivariable-adjusted Cox models, the hazard ratios (95% confidence intervals) for the highest vs. lowest quintile of the DII in men and women were 1.15 (1.09⁻1.21) and 1.22 (1.14⁻1.28) for all-cause, 1.13 (1.03⁻1.23) and 1.29 (1.17⁻1.42) for CVD, and 1.10 (1.00⁻1.21) and 1.13 (1.02⁻1.26) for cancer mortality. In men, an increased risk of all-cause mortality with higher DII scores was found in all racial/ethnic groups except for Native Hawaiians (P for heterogeneity < 0.001). Similarly, in women, an increased risk of CVD mortality was found in the four racial/ethnic groups, but not in Native Hawaiians. These findings support the association of a pro-inflammatory diet with a higher risk of mortality and suggest the association may vary by race/ethnicity.
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Affiliation(s)
- Song-Yi Park
- Cancer Center, University of Hawaii, Honolulu, HI 96813, USA.
| | - Minji Kang
- Cancer Center, University of Hawaii, Honolulu, HI 96813, USA.
- Center for Gendered Innovations in Science and Technology Research (GISTeR), Seoul, Korea.
| | - Lynne R Wilkens
- Cancer Center, University of Hawaii, Honolulu, HI 96813, USA.
| | | | - Brook E Harmon
- School of Public Health, University of Memphis, Memphis, TN 38152, USA.
| | - Nitin Shivappa
- Cancer Prevention and Control Program, Arnold School of Public Health, University of South Carolina, Columbia, SC 292008, USA.
| | - Michael D Wirth
- Cancer Prevention and Control Program, Arnold School of Public Health, University of South Carolina, Columbia, SC 292008, USA.
| | - James R Hébert
- Cancer Prevention and Control Program, Arnold School of Public Health, University of South Carolina, Columbia, SC 292008, USA.
| | - Christopher A Haiman
- Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA 90033, USA.
| | | | - Carol J Boushey
- Cancer Center, University of Hawaii, Honolulu, HI 96813, USA.
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