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Risk factors for cardio-cerebrovascular events among patients undergoing continuous ambulatory peritoneal dialysis
Penglei Li1,2, Tiegang Lv1,2, Liping Xu1,2
1Department of Medicine, Division of Nephrology, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China.
Insights
Low serum magnesium levels are a significant predictor of cardio-cerebrovascular events in patients undergoing continuous ambulatory peritoneal dialysis (CAPD). Maintaining adequate serum magnesium is crucial for reducing event risk in this population.
Area of Science:
- Nephrology
- Cardiology
- Biochemistry
Background:
- Chronic kidney disease (CKD) is associated with altered mineral metabolism.
- Patients with CKD, particularly those on dialysis, face elevated risks of cardiovascular and cerebrovascular events.
- Serum magnesium levels are implicated in CKD patient outcomes, with levels >0.9 mmol/L linked to better survival.
Purpose of the Study:
- To identify risk factors for cardio-cerebrovascular events in patients on continuous ambulatory peritoneal dialysis (CAPD).
- To investigate the correlation between serum magnesium levels and these cardio-cerebrovascular events.
Main Methods:
- Retrospective analysis of data from 189 CAPD patients.
- Collection of sociodemographic, clinical, physiological, and biochemical data.
- Univariate and multivariate logistic regression analyses to identify risk factors and independent predictors.
- Correlation analysis to assess relationships between serum magnesium and other biochemical markers.
Main Results:
- Univariate analysis identified age, CRP, RDW-SD, RDW-CV, serum albumin, potassium, sodium, chlorine, magnesium, and uric acid as risk factors.
- Serum magnesium ≤0.8 mmol/L demonstrated the highest odds ratio (3.996) for events.
- Multivariate analysis confirmed serum magnesium as an independent risk factor and serum uric acid (<440 μmol/L) as an independent protective factor.
- A significant difference in event incidence was observed across serum magnesium grades (p=0.002), highest in the <0.8 mmol/L group.
- High serum magnesium positively correlated with albumin, potassium, and uric acid, and negatively with CRP.
Conclusions:
- Low serum magnesium levels are a significant independent predictor of cardio-cerebrovascular events in CAPD patients.
- Serum magnesium levels below 0.8 mmol/L are associated with a substantially increased risk.
- Maintaining optimal serum magnesium levels may be a key strategy for preventing cardio-cerebrovascular events in CAPD patients.
Abstract:
Serum magnesium levels exceeding 0.9 mmol/L are associated with increased survival rates in patients with CKD. This retrospective study aimed to identify risk factors for cardio-cerebrovascular events among patients receiving continuous ambulatory peritoneal dialysis (CAPD) and to examine their correlations with serum magnesium levels. Sociodemographic data, clinical physiological and biochemical indexes, and cardio-cerebrovascular event data were collected from 189 patients undergoing CAPD. Risk factors associated with cardio-cerebrovascular events were identified by univariate binary logistic regression analysis. Correlations between the risk factors and serum magnesium levels were determined by correlation analysis. Univariate regression analysis identified age, C-reactive protein (CRP), red cell volume distribution width standard deviation, red cell volume distribution width corpuscular volume, serum albumin, serum potassium, serum sodium, serum chlorine, serum magnesium, and serum uric acid as risk factors for cardio-cerebrovascular events. Among them, serum magnesium ≤0.8 mmol/L had the highest odds ratio (3.996). Multivariate regression analysis revealed that serum magnesium was an independent risk factor, while serum UA (<440 μmol/L) was an independent protective factor for cardio-cerebrovascular events. The incidence of cardio-cerebrovascular events differed significantly among patients with different grades of serum magnesium (χ = 12.023, p = 0.002), with the highest incidence observed in patients with a serum magnesium concentration <0.8 mmol/L. High serum magnesium levels were correlated with high levels of serum albumin (r = 0.399, p < 0.001), serum potassium (r = 0.423, p < 0.001), and serum uric acid (r = 0.411, p < 0.001), and low levels of CRP (r = -0.279, p < 0.001). In conclusion, low serum magnesium may predict cardio-cerebrovascular events in patients receiving CAPD.
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