The Association Between Dietary Acid Load and Odds of Migraine: A Case–Control Survey
Abstract
Introduction It has been shown that a high acid load in the human body can affect inflammatory factors and the nitric oxide pathway. These factors are also thought to play an important role in the initiation of migraine attacks. We have therefore explored the association between dietary acid load and odds of migraine in a case–control study. Methods The migraine group ( n = 514, diagnosed according to the International Classification of Headache Disorders 3rd edition [ICHDIII] criteria) was recruited from a tertiary headache clinic. The controls consisted of 582 sex-matched healthy volunteers who were randomly selected from the general population. A validated 168-item semiquantitative food frequency questionnaire was used for dietary intake assessments. Estimation of the dietary acid load was performed using three different measures: potential renal acid load (PRAL) score, net endogenous acid production (NEAP) score, and protein/potassium ratio. Results Multivariable logistic regression analysis showed that, in comparison with the lowest tertile, the highest tertile of dietary acid load measures, including PRAL (odds ratio [OR] 7.208, 95% confidence intervals [CI] 3.33–15.55), and NEAP (OR 4.108, 95% CI 1.924–8.774) scores and the protein/potassium ratio (OR 4.127, 95% CI 1.933–8.814), significantly increased the odds of migraine ( P value for trend ≤ 0.001). Conclusion In this study, high dietary acid load was associated with higher odds of migraine. It is therefore…
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