Publications by authors named "Andrew Karter"

Objective: To compare the risk of hospitalization for infection among patients who achieve intensive versus relaxed glycemic control.

Research Design And Methods: This retrospective cohort study included adults age ≥65 years with type 2 diabetes from an integrated health care delivery system. Negative binomial models were used to estimate incidence rates and relative risk (RR) of hospitalization for infections (respiratory; genitourinary; skin, soft tissue, and bone; and sepsis), comparing two levels of relaxed (hemoglobin A1c [HbA1c] 7% to <8% and 8% to <9%) with intensive (HbA1c 6% to <7%) glycemic control from 1 January 2019 to 1 March 2020.

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Background: Racial and ethnic disparities in type 2 diabetes outcomes are a major public health concern. Interventions targeting multiple barriers may help address disparities.

Purpose: To conduct a systematic review and meta-analysis of diabetes self-management education (DSME) interventions in minority populations.

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Introduction: Although poor glycemic control is associated with dementia, it is unknown if variability in glycemic control, even in those with optimal glycosylated hemoglobin A (HbA) levels, increases dementia risk.

Methods: Among 171,964 people with type 2 diabetes, we evaluated the hazard of dementia association with long-term HbA variability using five operationalizations, including standard deviation (SD), adjusting for demographics and comorbidities.

Results: The mean baseline age was 61 years (48% women).

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Article Synopsis
  • Severe hypoglycemia, a significant health risk for older diabetes patients, is linked to both economic and physical food insecurity, with the latter being less researched.
  • A study surveyed 1,164 older adults with type 2 diabetes in 2019, revealing that 12.3% faced food insecurity, which was closely connected to an increased risk of severe hypoglycemia.
  • The main cause of hypoglycemia reported was missed meals, highlighting the need for targeted prevention strategies that consider both types of food insecurity.
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  • Sodium-Glucose Cotransporter 2 Inhibitors (SGLT2i) and Glucagon-Like Peptide-1 Receptor Agonists (GLP-1 RA) are beneficial for cardiovascular and kidney health in type 2 diabetes patients, and equitable use can help reduce racial and ethnic health disparities.
  • A study analyzed data from over 687,000 patients from 2014 to 2022 to assess the dispensing trends of SGLT2i and GLP-1 RA among different racial and ethnic groups.
  • Results indicated that minority groups, including American Indian/Alaska Native, Black, and Hispanic patients, received these medications less frequently compared to White patients, highlighting the need for
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Introduction: The American Heart Association Life's Simple 7 schema can be used to categorize patients' cardiovascular health status as poor, intermediate, or ideal on the basis of smoking, BMI, physical activity, dietary patterns, blood pressure, cholesterol, and fasting blood sugar. This study examined the association between cardiovascular health status and subsequent healthcare utilization.

Methods: This was an observational cohort study of adults from an integrated healthcare delivery system-Kaiser Permanente Northern California-that had outpatient care between 2013 and 2014.

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Background: To examine the willingness of older patients to take less diabetes medication (de-intensify) and to identify characteristics associated with willingness to de-intensify treatment.

Methods: Survey conducted in 2019 in an age-stratified, random sample of older (65-100 years) adults with diabetes on glucose-lowering medications in the Kaiser Permanente Northern California Diabetes Registry. We classified survey responses to the question: "I would be willing to take less medication for my diabetes" as willing, neutral, or unwilling to de-intensify.

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Background: Patient engagement with secure messaging (SM) via digital patient portals has been associated with improved diabetes outcomes, including increased patient satisfaction and better glycemic control. Yet, disparities in SM uptake exist among older patients and racial and ethnic underserved groups. Care partners (family members or friends) may provide a means for mitigating these disparities; however, it remains unclear whether and to what extent care partners might enhance SM use.

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Determine whether continuous glucose monitor (CGM) metrics can provide actionable advance warning of an emergency department (ED) visit or hospitalization for hypoglycemic or hyperglycemic (dysglycemic) events. Two nested case-control studies were conducted among insulin-treated diabetes patients at Kaiser Permanente, who shared their CGM data with their providers. Cases included dysglycemic events identified from ED and hospital records (2016-2021).

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Background: Severe hypoglycemia is a common and feared complication of medications used to lower blood glucose levels in individuals with diabetes. Psychoeducational interventions can prevent severe hypoglycemia in individuals with type 1 diabetes (T1D). We aim to determine the effectiveness of this approach among adults with type 2 diabetes (T2D) at elevated risk for severe hypoglycemia.

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  • This study aimed to evaluate the rates of severe hypoglycemia and falls among older adults with diabetes and how they are related.
  • A survey of 2,158 adults aged 65-100 showed that 3.7% experienced severe hypoglycemia, but most did not seek emergency care.
  • It found that those with severe hypoglycemia had a 70% higher prevalence of falls, highlighting that both conditions are common yet often under-reported among this age group.
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Background: For older adults with type 2 diabetes (T2D) treated with insulin or sulfonylureas, Endocrine Society guideline recommends HbA1c between 7% to <7.5% for those in good health, 7.5% to <8% for those in intermediate health, and 8% to <8.

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  • African American patients exhibited significantly higher hemoglobin A1c (A1C) levels compared to White patients with the same average glucose levels, highlighting potential inconsistencies in diabetes management.
  • This retrospective study, involving 1,788 diabetes patients from Kaiser Permanente Northern California, analyzed over 124 million continuous glucose monitor (CGM) readings to assess how mean glucose correlates with A1C across different racial/ethnic groups.
  • While African Americans showed a notable difference in A1C results, no significant disparities were found between Whites, Asians, Latinos, or multiethnic patients, suggesting that treatment based on A1C should be individualized rather than solely guided by standard targets.
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The past decade of population research for diabetes has seen a dramatic proliferation of the use of real-world data (RWD) and real-world evidence (RWE) generation from non-research settings, including both health and non-health sources, to influence decisions related to optimal diabetes care. A common attribute of these new data is that they were not collected for research purposes yet have the potential to enrich the information around the characteristics of individuals, risk factors, interventions, and health effects. This has expanded the role of subdisciplines like comparative effectiveness research and precision medicine, new quasi-experimental study designs, new research platforms like distributed data networks, and new analytic approaches for clinical prediction of prognosis or treatment response.

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Background: Estimated life expectancy for older patients with diabetes informs decisions about treatment goals, cancer screening, long-term and advanced care, and inclusion in clinical trials. Easily implementable, evidence-based, diabetes-specific approaches for identifying patients with limited life expectancy are needed.

Objective: Develop and validate an electronic health record (EHR)-based tool to identify older adults with diabetes who have limited life expectancy.

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Importance: The levels of glycemic control associated with the lowest risk of dementia in people with type 2 diabetes are unknown. This knowledge is critical to inform patient-centered glycemic target setting.

Objective: To examine the associations between cumulative exposure to various ranges of glycated hemoglobin (HbA1c) concentrations with dementia risk across sex and racial and ethnic groups and the association of current therapeutic glycemic targets with dementia risk.

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Objective: Although diabetic retinopathy is a leading cause of blindness worldwide, diabetes-related blindness can be prevented through effective screening, detection, and treatment of disease. The study goal was to develop risk stratification algorithms for the onset of retinal complications of diabetes, including proliferative diabetic retinopathy, referable retinopathy, and macular edema.

Research Design And Methods: Retrospective cohort analysis of patients from the Kaiser Permanente Northern California Diabetes Registry who had no evidence of diabetic retinopathy at a baseline diabetic retinopathy screening during 2008-2020 was performed.

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Background: We set out to identify empirically-derived health status classes of older adults with diabetes based on clusters of comorbid conditions which are associated with future complications.

Methods: We conducted a cohort study among 105,786 older (≥65 years of age) adults with type 2 diabetes enrolled in an integrated healthcare delivery system. We used latent class analysis of 19 baseline comorbidities to derive health status classes and then compared incident complication rates (events per 100 person-years) by health status class during 5 years of follow-up.

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Objective: Given persistent racial/ethnic differences in type 2 diabetes outcomes and the lasting benefits conferred by early glycemic control, we examined racial/ethnic differences in diabetes medication initiation during the year following diagnosis.

Methods: Among adults newly diagnosed with type 2 diabetes (2005-2016), we examined how glucose-lowering medication initiation differed by race/ethnicity during the year following diagnosis. We specified modified Poisson regression models to estimate the association between race/ethnicity and medication initiation in the entire cohort and within subpopulations defined by HbA1c, BMI, age at diagnosis, comorbidity, and neighborhood deprivation index (a census tract-level socioeconomic indicator).

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Article Synopsis
  • The incidence of type 1 diabetes (T1D) and type 2 diabetes (T2D) is rising, particularly among older adults, but while T2D's cognitive risks are known, T1D's impact on cognition remains unclear.
  • A study involving 734 individuals with T1D, 232 with T2D, and 247 without diabetes found that T1D is linked to poorer cognitive function, particularly in areas like language and memory, and higher odds of cognitive impairment compared to both non-diabetic individuals and those with T2D.
  • The research concludes that older adults with T1D experience greater cognitive decline than those with T2D or without diabetes, highlighting the
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  • * A study involving over 17,000 insulin-treated T2D patients found that CGM use led to a slight decrease in HbA1c levels in those who started it, which indicates better blood sugar control.
  • * The research suggests that CGM could help prevent worsening blood sugar levels in well-controlled patients with T2D, although it did not significantly reduce severe hypoglycemia rates.
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