Dietary inflammatory index and risk of renal cancer in the Iowa Women’s Health Study

Nitin Shivappa, Cindy K. Blair, Anna E. Prizment, David R. Jacobs, James R. Hébert

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


Background: The association between inflammatory potential of diet and renal cancer risk has not been investigated. Methods: In this study, we explored the association between the dietary inflammatory index (DII) and risk of renal cancer in the Iowa Women’s Health Study. From 1986 to 2011, 33,817 women initially recruited at 55–69 years of age were followed for incident renal cancers (n = 263). The DII was computed based on dietary intake assessed using a reproducible and valid 121-item food frequency questionnaire. Cox proportional hazards regression was used to estimate hazard ratios (HR) adjusting for age, body mass index, energy intake, smoking status, education, pack years of smoking, hypertension, and hormone replacement therapy. Results: Multivariable analyses revealed positive association between higher DII scores and renal cancer risk (HR for DIIcontinuous: 1.07 per unit increase in DII (corresponding to 10% change in the DII range in the current study); 95% CI 1.00, 1.15; HR for DIItertile3vs1 = 1.52; 95% CI 1.09, 2.13). Stratified analyses produced slightly stronger associations between DII and renal cancer risk among women with BMI <30 kg/m2 (HRTertile3vs1 = 1.57; 95% CI = 1.04, 2.36) and ever smokers (HRtertile3vs1 = 2.35; 95% CI = 1.22, 4.55), although the corresponding interaction p values were not significant. Conclusion: Pro-inflammatory diet, as indicated by higher DII scores, was associated with increased renal cancer risk.

Original languageEnglish (US)
Pages (from-to)1207-1213
Number of pages7
JournalEuropean Journal of Nutrition
Issue number3
StatePublished - Apr 1 2018

Bibliographical note

Publisher Copyright:
© 2017, Springer-Verlag Berlin Heidelberg.


  • Cohort
  • Diet
  • Dietary inflammatory index (DII)
  • Inflammation
  • Renal cancer risk


Dive into the research topics of 'Dietary inflammatory index and risk of renal cancer in the Iowa Women’s Health Study'. Together they form a unique fingerprint.

Cite this