NDLI: The association between dietary inflammatory index and risk of colorectal cancer among postmenopausal women: results from the Women’s Health Initiative

Content Provider	Springer Nature Link
Author	Tabung, Fred K. Steck, Susan E. Ma, Yunsheng Liese, Angela D. Zhang, Jiajia Caan, Bette Hou, Lifang Johnson, Karen C. Mossavar Rahmani, Yasmin Shivappa, Nitin Wactawski Wende, Jean Ockene, Judith K. Hebert, James R.
Copyright Year	2014
Abstract	Inflammation is a process central to carcinogenesis and in particular to colorectal cancer (CRC). Previously, we developed a dietary inflammatory index (DII) from extensive literature review to assess the inflammatory potential of diet. In the current study, we utilized this novel index in the Women’s Health Initiative to prospectively evaluate its association with risk of CRC in postmenopausal women.The DII was calculated from baseline food frequency questionnaires administered to 152,536 women aged 50–79 years without CRC at baseline between 1993 and 1998 and followed through 30 September 2010. Incident CRC cases were ascertained through a central physician adjudication process. Multiple covariate-adjusted Cox proportional hazards regression models were used to estimate hazard ratios (HR) and 95 % confidence intervals (95 % CI) for colorectal, colon (proximal/distal locations), and rectal cancer risk, by DII quintiles (Q).During an average 11.3 years of follow-up, a total of 1,920 cases of CRC (1,559 colon and 361 rectal) were identified. Higher DII scores (representing a more pro-inflammatory diet) were associated with an increased incidence of CRC (HRQ5–Q1 1.22; 95 % CI 1.05, 1.43; p trend = 0.02) and colon cancer, specifically proximal colon cancer (HRQ5–Q1 1.35; 95 % CI 1.05, 1.67; p trend = 0.01) but not distal colon cancer (HRQ5–Q1 0.84; 95 % CI 0.61, 1.18; p trend = 0.63) or rectal cancer (HRQ5–Q1 1.20; 95 % CI 0.84, 1.72; p trend = 0.65).Consumption of pro-inflammatory diets is associated with an increased risk of CRC, especially cancers located in the proximal colon. The absence of a significant association for distal colon cancer and rectal cancer may be due to the small number of incident cases for these sites. Interventions that may reduce the inflammatory potential of the diet are warranted to test our findings, thus providing more information for colon cancer prevention.
Starting Page	399
Ending Page	408
Page Count	10
File Format	PDF
ISSN	09575243
Journal	Cancer Causes & Control
Volume Number	26
Issue Number	3
e-ISSN	15737225
Language	English
Publisher	Springer International Publishing
Publisher Date	2014-12-31
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Dietary inflammatory index Colorectal cancer Women’s Health Initiative Cancer Research Biomedicine general Oncology Public Health Epidemiology Hematology
Content Type	Text
Resource Type	Article
Subject	Cancer Research Oncology

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