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Updated: Aug 28, 2025
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Published on: January 28, 2012
The low risk for early renal damage during lithium treatment has not changed over time
Mihaela Golic1, Harald Aiff1, Per-Ola Attman2
1Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden.
Insights
The risk of severe kidney damage in long-term lithium patients remains low and unchanged despite improved monitoring guidelines. Enhanced compliance did not reduce the incidence of chronic kidney disease stage 4 (CKD4).
Area of Science:
- Nephrology
- Pharmacology
- Clinical Medicine
Background:
- Lithium therapy is crucial for managing bipolar disorder.
- Modern guidelines aim to mitigate lithium-induced nephrotoxicity.
- Long-term lithium use necessitates careful renal function monitoring.
Purpose of the Study:
- To evaluate changes in severe renal impairment risk among lithium patients over decades.
- To determine if updated lithium monitoring guidelines impacted long-term renal outcomes.
- To assess the incidence of chronic kidney disease stage 4 (CKD4) in relation to guideline implementation.
Main Methods:
- A retrospective cohort study comparing three groups of patients initiating lithium treatment in the 1980s, 1990s, and 2000s.
- Follow-up duration of 10 years post-initial treatment year.
- Analysis of time to and hazard for CKD4 using laboratory data from Sahlgrenska University Hospital.
Main Results:
- 2169 patients were analyzed across three decades.
- Improved guideline compliance and decreased mean serum lithium levels were observed over time.
- No significant difference in the time to or hazard for CKD4 was found between the cohorts, with age and baseline creatinine as risk factors.
Conclusions:
- The risk of severe renal damage within the first decade of lithium treatment is low but has not decreased despite guideline improvements.
- Enhanced adherence to lithium monitoring protocols has not translated into a reduced risk of significant renal impairment.
- Further research may be needed to identify more effective strategies for preventing lithium nephrotoxicity.
Background:
Modern lithium management guidelines were introduced to improve the renal prognosis of lithium patients.
Aims:
To examine whether prospects for severe renal impairment (defined as chronic kidney disease at least stage 4 (CKD4)), in long-term lithium patients, have changed over time after the introduction of lithium monitoring guidelines.
Methods:
The time to and hazard for CKD4 were compared between three patient cohorts who started long-term lithium in three consecutive decades: 1980s, 1990s and 2000s. The follow-up time was 10 years after completion of 1-year treatment. The data were collected from Sahlgrenska University Hospital's laboratory database.
Results:
In all, 2169 patients were included: 623 in Cohort 1 (started lithium during 1980s), 874 in Cohort 2 (1990s) and 672 in Cohort 3 (2000s). Compliance with lithium monitoring guidelines improved, and mean serum lithium decreased, through the cohorts. In all, 22 patients developed CKD4 during follow-up. The time to CKD4 was the same in all three cohorts (overall: 10.96 years, 95% confidence interval: 10.94-11 years). Age and serum creatinine concentration at start were significant risk factors, while sex had no prognostic value. After adjusting for the significant covariates, there was no statistically significant difference in the hazard for CKD4 between the three cohorts.
Conclusion:
The risk for severe renal damage during the first decade of long-term lithium is low, but has not changed over time. Our data suggest that improved compliance with lithium guidelines is not reflected in less risk for severe renal damage.
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