Annals Internal Medicine, Author Interviews, Kidney Disease / 28.01.2026
Kaiser Permanente Study Evaluates Speed of Recovery from Low Blood Sodium (Hyponatremia) and Adverse Outcomes
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Dr. Mark[/caption]
MedicalResearch.com Interview with:
Dustin Mark, MD
Emergency Medicine/Critical Care Medicine, East Bay
Adjunct Researcher, KPNC Division of Research, CREST Network
MedicalResearch.com: What is the background for this study?
Response: We examined medical records from 13,988 adults hospitalized with severe hyponatremia between 2008 and 2023 across 21 community hospitals in the Kaiser Permanente Northern California health system. Patients were grouped based on how quickly their sodium levels were corrected within a 24-hour period (< 8 meq/L, 8-12 meq/L, > 12 meq/L) and were followed for up to 90 days.
The primary outcome was death or serious delayed neurologic events, such as brain damage, seizures, paralysis, or altered consciousness. The results suggest that there is likely a true independent association between slow sodium correction and adverse outcomes, and that current guidelines promoting slow correction of sodium levels should be re-evaluated accordingly.
Dr. Mark[/caption]
MedicalResearch.com Interview with:
Dustin Mark, MD
Emergency Medicine/Critical Care Medicine, East Bay
Adjunct Researcher, KPNC Division of Research, CREST Network
MedicalResearch.com: What is the background for this study?
Response: We examined medical records from 13,988 adults hospitalized with severe hyponatremia between 2008 and 2023 across 21 community hospitals in the Kaiser Permanente Northern California health system. Patients were grouped based on how quickly their sodium levels were corrected within a 24-hour period (< 8 meq/L, 8-12 meq/L, > 12 meq/L) and were followed for up to 90 days.
The primary outcome was death or serious delayed neurologic events, such as brain damage, seizures, paralysis, or altered consciousness. The results suggest that there is likely a true independent association between slow sodium correction and adverse outcomes, and that current guidelines promoting slow correction of sodium levels should be re-evaluated accordingly.
Dr. Maki Inoue-Choi,[/caption]
Maki Inoue-Choi, Ph.D., M.S., R.D.
Staff Scientist
Metabolic Epidemiology Branch
National Institutes of Health
MedicalResearch.com: What is the background for this study?
Response: Tea is rich in bioactive compounds that can possibly protect against health conditions such as cancer and heart disease. A lower risk of death was seen among tea drinkers than non-drinkers in previous studies, but these were largely in populations where green tea drinking is common. In contrast, the studies in populations where black tea drinking is more common have been limited and the findings from these studies have been inconsistent.
Shuchi Anand, MD MS (she/her)
Assistant Professor in Medicine
Director, Center for Tubulointerstitial Kidney Disease
Stanford University School of Medicine
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: A majority of people on dialysis who completed vaccination as of September 2021 have had a decline in antibody response to levels that would render them vulnerable to infection. Antibody response immediately after vaccination and circulating antibody response is strongly associated with risk for breakthrough after the initial vaccination series.
Dr. Lee[/caption]
Brian P. Lee, MD, MAS
Assistant Professor Clinical Medicine
University of Southern Californi
Keck School of Medicine
Los Angeles, California
MedicalResearch.com: What is the background for this study?
Response: The COVID-19 pandemic has been associated with mental health stressors, including anxiety, loneliness, and social instability. We hypothesized the pandemic may have led to increased alcohol and tobacco use as a coping mechanism for these stressors. National retrospective questionnaires had suggested higher reports of substance use, but these are limited by selection and recall biases, in addition to subjective report – we sought to address this knowledge gap by using a nationally-representative longitudinal cohort (Nielsen National Consumer Panel) tracking real-time purchases of households across the US.
Prof. Pottel[/caption]
Prof. Dr. Hans Pottel PhD
Professeur Invité (titre honorifique)
Faculté de Médecine
Université de Liège
KULeuven-KULAK, Kortrijk, Belgium
MedicalResearch.com: What is the background for this study? Why do we need a new GFR?
Response: The currently recommended equations have flaws, mainly because there is one equation (CKiD) recommended for children, and one recommended (CKD-EPI) for adults (by KDIGO). When transitioning from pediatric nephrology care to adult nephrology care, the switch from CKiD to CKD-EPI causes implausible jumps (of more than 50%), mainly because CKD-EPI largely overestimates GFR in young adults (18-30 years). The new equation overcomes this problem as it applies for all ages (for children and adults) and overcomes the known flaws of the currently most used equations. The new equation is less biased and more precise across the full age spectrum and for the full range of serum creatinine concentrations.
The equation was developed in 11 251 participants from 7 cohorts (development and internal validation datasets) and validated in 8 378 participants from 6 cohorts (external validation dataset). Data were coming from European and American nephrology centers. No patients of African-American ancestry were included. Actually, the previously published FAS-equation served as the basic mathematical form for the equation, but we adjusted the power coefficients for serum creatinine (very much like it was done in the CKD-EPI equation). You could say that we used properties of both the FAS and CKD-EPI equation to come to an improved equation to estimate GFR.
Dr. Hesse[/caption]
Dr. Elisabeth Hesse, MD
Epidemic Intelligence Service (EIS Officer)
Centers for Disease Control and Prevention
MedicalResearch.com: What is the background for this study?
Response: Over the last decade, there has been increasing attention given to shoulder injuries diagnosed after intramuscular vaccinations, with multiple publications of case reports and case series. However, to the best of our knowledge, there haven’t been any robust studies to determine how frequently this happens and what may make some people more likely than others to have shoulder injuries after vaccination. The Vaccine Safety Datalink (VSD) is an ideal system to use for such a study, because it contains medical and vaccination records of over 10 million people across the United States. We found that out of the 2.9 million people over the age of 3 who received an injectable flu vaccine (specifically, inactivated influenza vaccine) during the 2016-2017 flu season, fewer than 8 people per million vaccinated developed shoulder bursitis that can be attributed to the vaccination.

Vasily Giannakeas[/caption]
Vasily Giannakeas, MPH
Epidemiologist/ Dedicated ICES Analyst
Women's College Hospital
Toronto, Ontario, Canada
MedicalResearch.com: What is the background for this study?
Response: As some health care systems approach collapse, a pressing need exists for tools modeling the capacity of acute and critical care systems during the COVID-19 pandemic.
We developed an online tool to estimate the maximum number of COVID-19 cases that could be managed per day within the catchment area served by a health care system, given acute and critical care resource availability.
The COVID-19 Acute and Intensive Care Resource Tool (CAIC-RT) is open access and available at