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Hyponatremia‐associated hospital visits are not reduced by early electrolyte testing in older adults starting antidepressants.
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- Author(s): Lane, Natasha E.; Bai, Li; Seitz, Dallas P.; Juurlink, David N.; Paterson, J. Michael; Guan, Jun; Stukel, Therese A.
- Source:
Journal of the American Geriatrics Society. Jun2024, Vol. 72 Issue 6, p1770-1780. 11p. - Source:
- Additional Information
- Subject Terms: POISSON distribution; EARLY medical intervention; RESEARCH funding; HOSPITAL care; SEROTONIN uptake inhibitors; PROBABILITY theory; EVALUATION of medical care; RETROSPECTIVE studies; DESCRIPTIVE statistics; RELATIVE medical risk; ANTIDEPRESSANTS; ELECTROLYTES; LONGITUDINAL method; INAPPROPRIATE ADH syndrome; SODIUM; HYPONATREMIA; COMPARATIVE studies; CONFIDENCE intervals
- Subject Terms:
- Abstract: Background: Clinical practice guidelines recommend early serum electrolyte monitoring when starting antidepressants in older adults due to the increased risk of hyponatremia. It is unclear whether this monitoring improves outcomes. Methods: Population‐based, retrospective cohort study of Ontario adults aged ≥66 years who initiated therapy with a selective serotonin reuptake inhibitor (SSRI) or selective norepinephrine reuptake inhibitor (SNRI) between April 1, 2013, and January 31, 2020. The index date was the date of the first such prescription, and the exposure of interest was serum electrolyte measurement during the subsequent 7 days. The primary outcome was any emergency department or hospital admission with hyponatremia within 8–60 days of antidepressant initiation. Poisson regression models compared individuals who had versus did not have their serum electrolytes tested in the week following SSRI/SNRI initiation, weighting by propensity score‐based overlap weights. Results: Among the 420,085 patients aged ≥66 years initiating treatment with an SSRI/SNRI, 26,808 (6.4%) had serum electrolytes measured in the subsequent 7 days and 6109 (1.5%) subsequently presented to hospital with hyponatremia. The time from drug initiation to hospitalization varied (median 29, interquartile range [IQR] 17–44 days), and the median sodium concentration measured in the community (136, IQR 133–138 mmol/L) was marginally higher than those at the time of hospitalization (132, IQR 130–134 mmol/L). Patients who underwent electrolyte testing in the week following SSRI/SNRI treatment were more likely to attend an emergency department (ED) or hospital with hyponatremia within 8–60 days relative to those who did not (relative risk = 2.31, 95% confidence interval: 2.16–2.46). Conclusions: Testing serum electrolytes in the week after starting an SSRI/SNRI is not associated with a reduced risk of a hospital visit with hyponatremia. These findings do not support current guidelines recommending routine electrolyte monitoring. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Journal of the American Geriatrics Society is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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