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Bei, H.‐Z.; You, S.‐J.; Zheng, D.; Zhong, C.‐K.; Du, H.‐P.; Zhang, Y.; Lu, T.‐S.; Cao, L.‐D.; Dong, X.‐F.; Cao, Y.‐J.; Liu, C.‐F.
Acta neurologica Scandinavica, December 2017, Volume: 136, Issue: 6Journal Article
Objectives The impact of electrolyte imbalance on clinical outcomes after acute ischemic stroke (AIS) is still not understood. We investigated the association between hypochloremia and hyponatremia upon hospital admission and in‐hospital mortality in AIS patients. Materials and methods A total of 3314 AIS patients enrolled from December 2013 to May 2014 across 22 hospitals in Suzhou city were included in this study. Hypochloremia was defined as having a serum chloride concentration <98 mmol/L and hyponatremia as having a serum sodium concentration <135 mmol/L. The Cox proportional hazard model was used to examine the effect of hypochloremia and hyponatremia on all‐cause in‐hospital mortality in AIS patients. Results During hospitalization, 118 patients (3.6%) died from all causes. Multivariable model adjusted for age, sex, baseline National Institutes of Health Stroke Scale score, serum sodium, and other potential covariates showed that hypochloremia was associated with a 2.43‐fold increase in the risk of in‐hospital mortality (hazard ratio HR 2.43; 95% confidence interval CI, 1.41‐4.19; P=.001). However, no significant association between hyponatremia (P=.905) and in‐hospital mortality was observed. Moreover, the multivariable analysis found that serum chloride (HR=0.92, 95% CI 0.88‐0.98; P=.004) but not serum sodium (P=.102) was significantly associated with in‐hospital mortality. Conclusions Hypochloremia at admission was independently associated with in‐hospital mortality in AIS patients.
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