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Abstract
Objective: The present study was aimed to determine whether high potassium level during pregnancy is an independent risk factor for future atherosclerotic morbidity.
Patients and methods: A case–control study was conducted including women who delivered between the years 2000–2012 and subsequently developed atherosclerotic morbidity after their last delivery (n = 653) and matched controls (n = 4101). The mean follow-up duration was 57.7 ± 36.5 and 78.5 ± 42.3 months, respectively. The cases were further divided into: major events (severe atherosclerotic morbidity; n = 363), minor events (i.e. cardiovascular risk factors; n = 201) and cardiovascular evaluation tests (n = 89). The Cox proportional hazards models were used to estimate the adjusted hazard ratios (HR) for hospitalizations while controlling for confounders.
Results: A Cox proportional hazard model, controlling for confounders such as gestational hypertension, gestational diabetes mellitus, obesity, maternal age, creatinine level and gestational week at index pregnancy showed that K+ ≥ 5.0 mEq/L during pregnancy was significantly associated with hospitalizations due to severe atherosclerotic morbidity (adjusted HR = 1.55; 95% CI 1.02–2.35; p = 0.039). A non-significant trend was also noted with long-term total hospitalizations for atherosclerotic (adjusted HR = 1.39; 95% CI 0.99–1.94; p = 0.052).
Conclusion: High potassium level during pregnancy is associated with a significant risk for severe atherosclerotic morbidity, as it might be an indication for occult metabolic and renal dysfunction.
Declaration of interest
The authors declare no conflicts of interests. The authors alone are responsible for the content and writing of this article.
Supplementary material available online