To Örebro University

OBJECTIVES: There is some preclinical evidence suggesting a pro-inflammatory diet reduces kidney function. In the present study, we aimed to investigate the association of inflammatory potential of diet with the risk of chronic renal failure (CRF).

METHODS: Cox regression models were used to examine the association between the energy-adjusted dietary inflammation index (E-DII) quartiles and CRF adjusting varying degrees of confounders. Restricted cubic spline regression was additionally adopted to determine the association of the continuous E-DII and CRF risk. A series of sensitivity and subgroup analyses were also conducted.

RESULTS: A total of 163,433 participants entered the primary analysis. During a mean follow-up period of 12.65 years, incident CRF occurred in 5, 333 participants (3.26%). The E-DII scores was stratified into four quartile groups. In a fully adjusted multivariable model, the adjusted hazard ratio for the second, third, and highest quartiles of E-DII intake was 1.12 (95% confidence interval [CI]: 1.04-1.21), 1.21 (95% CI: 1.12-1.31), and 1.23 (95% CI: 1.14-1.33), respectively, compared with the lowest quartile. Trend test indicated a statistically significant increasing trend with increasing E-DII quartiles (P < 0.0001). Similarly, restricted cubic spline regression displayed a positive association of continuous E-DII with CRF, wherein higher scores were linked to an elevated risk of CRF. Results of sensitivity analyses demonstrated consistent findings.

CONCLUSIONS: Diet with higher proinflammatory potential was linked to an increased risk of CRF. Implementing measures to limit the intake of pro-inflammatory foods or promoting the adoption of an anti-inflammatory dietary pattern could potentially reduce the occurrence of CRF.