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The American journal of medicine, 2011-11, Vol.124 (11), p.1064-1072
2011
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Autor(en) / Beteiligte
Titel
Risk of Thiazide-induced Hyponatremia in Patients with Hypertension
Ist Teil von
  • The American journal of medicine, 2011-11, Vol.124 (11), p.1064-1072
Ort / Verlag
New York, NY: Elsevier Inc
Erscheinungsjahr
2011
Quelle
MEDLINE
Beschreibungen/Notizen
  • Abstract Background Although hyponatremia is a well-recognized complication of treatment with thiazide diuretics, the risk of thiazide-induced hyponatremia remains uncertain in routine care. Methods We conducted a retrospective cohort study using a multicenter clinical research registry to identify 2613 adult outpatients that were newly treated for hypertension between January 1, 2000 and December 31, 2005 at 2 teaching hospitals in Boston, Massachusetts, and followed them for up to 10 years. Results Two hundred twenty patients exposed to ongoing thiazide therapy were compared with 2393 patients who were not exposed. In the exposed group, 66 (30%) developed hyponatremia (sodium ≤130 mmol/L). The adjusted incidence rate of hyponatremia was 140 cases per 1000 person-years for patients treated with thiazides, compared with 87 cases per 1000 person-years in those without thiazides. Patients exposed to thiazides were more likely to develop hyponatremia (adjusted incidence rate ratio, 1.61; 95% confidence interval [CI], 1.15-2.25). There was no significant difference in the risk of hospitalizations associated with hyponatremia (adjusted rate ratio, 1.04; 95% CI, 0.46-2.32) or mortality (adjusted rate ratio, 0.41; 95% CI, 0.12-1.42). The number needed to harm (to result in one excess case of incident hyponatremia in 5 years) was 15.02 (95% CI, 7.88-160.30). Conclusions Approximately 3 in 10 patients exposed to thiazides who continue to take them develop hyponatremia.

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