Karter, Andrew J.
Research interests include epidemiology and health services research in diabetes.
Risk of Cardiovascular Events in Statin-Treated Patients with Type 2 Diabetes and Metabolic Dyslipidemia without Prevalent Atherosclerotic Cardiovascular Disease
The relationship between achieved low-density lipoprotein cholesterol (LDL-C) levels and risk of incident atherosclerotic cardiovascular disease events among patients with…
Visual outcomes after cataract surgery in patients with type 2 diabetes
To assess the relation between diabetic retinopathy (DR) severity, duration of diabetes, insulin dependence, and preoperative hemoglobin A1c (HbA1c) with…
Using natural language processing and machine learning to classify health literacy from secure messages: The ECLIPPSE study
Limited health literacy is a barrier to optimal healthcare delivery and outcomes. Current measures requiring patients to self-report limitations are…
Predicting and Reducing Future Health Disparities for U.S. Adults with Diabetes
The clinical and financial impact of diabetes-related interventions and policies may not be quantifiable without the use of simulation models…
Association of Initiation of Basal Insulin Analogs vs Neutral Protamine Hagedorn Insulin With Hypoglycemia-Related Emergency Department Visits or Hospital Admissions and With Glycemic Control in Patients With Type 2 Diabetes
In clinical trials of patients with type 2 diabetes, long-acting insulin analogs modestly reduced the risk of nocturnal hypoglycemia compared…
Adherence to Cardio-protective Medications Prescribed for Secondary Prevention after an Acute Coronary Syndrome Hospitalization Compared to Usual Care
Secondary prevention after an acute coronary syndrome (ACS) hospitalization is critical to prevent additional morbidity and mortality. While poor adherence…
Effect of Out-of-Pocket Cost on Medication Initiation, Adherence, and Persistence among Patients with Type 2 Diabetes: The Diabetes Study of Northern California (DISTANCE)
To estimate the effect of out-of-pocket (OOP) cost on nonadherence to classes of cardiometabolic medications among patients with diabetes. Electronic…
Association Between Neighborhood Supermarket Presence and Glycated Hemoglobin Levels Among Patients With Type 2 Diabetes Mellitus
We estimated associations between neighborhood supermarket gain or loss and glycemic control (assessed by glycated hemoglobin (HbA1c) values) in patients…
Food Environment and Weight Change: Does Residential Mobility Matter?: The Diabetes Study of Northern California (DISTANCE)
Associations between neighborhood food environment and adult body mass index (BMI; weight (kg)/height (m)2) derived using cross-sectional or longitudinal random-effects…
Adherence to Newly Prescribed Diabetes Medications Among Insured Latino and White Patients With Diabetes
Medication adherence is essential to diabetes care. Patient-physician language barriers may affect medication adherence among Latino individuals. To determine the…
Severe Hypoglycemia: Ascertainment, Surveillance and Pharmacovigalence
Diabetes medications are commonly used to reduce high blood sugar, but their use can sometimes lead to dangerously low blood…
The Next Frontier in Diabetes Communication: Promoting Health Literacy in the Era of Secure Messaging
In this study, we will examine how diabetes patients with limited health literacy interact with their healthcare providers via secure…
Changes in Medication Use After Dementia Diagnosis in an Observational Cohort of Individuals with Diabetes Mellitus
To assess changes in medication use after a diagnosis of dementia in individuals with type 2 diabetes mellitus. Difference-in-differences analysis…
Depressive symptoms and adherence to cardiometabolic therapies across phases of treatment among adults with diabetes: the Diabetes Study of Northern California (DISTANCE)
Among adults with diabetes, depression is associated with poorer adherence to cardiometabolic medications in ongoing users; however, it is unknown…
Ten-year hemoglobin A1c trajectories and outcomes in type 2 diabetes mellitus: The Diabetes & Aging Study
To classify trajectories of long term HbA1c values in patients after diagnosis of type 2 diabetes and examine each trajectory's…
Identifying Spanish Language Competent Physicians: The Diabetes Study of Northern California (DISTANCE)
Language barriers negatively impact health care access and quality for US immigrants. Latinos are the second largest immigrant group and…
Police-Recorded Crime and Perceived Stress among Patients with Type 2 Diabetes: the Diabetes Study of Northern California (DISTANCE)
While stress has been linked to poor health outcomes, little is known about the impact of objective measures of neighborhood…
Is a reduction in distance to nearest supermarket associated with BMI change among type 2 diabetes patients?
We examined whether residing within 2 miles of a new supermarket opening was longitudinally associated with a change in body…
Communication Barriers and the Clinical Recognition of Diabetic Peripheral Neuropathy in a Diverse Cohort of Adults: The DISTANCE Study
The purpose of this study was to explore communication barriers as independent predictors and potential mediators of variation in clinical…
Financial Strain and Medication Adherence among Diabetes Patients in an Integrated Health Care Delivery System: The Diabetes Study of Northern California (DISTANCE)
To examine self-reported financial strain in relation to pharmacy utilization adherence data. Survey, administrative, and electronic medical data from Kaiser…
No Spillover Effect of the Foreclosure Crisis on Weight Change: The Diabetes Study of Northern California (DISTANCE)
The emerging body of research suggests the unprecedented increase in housing foreclosures and unemployment between 2007 and 2009 had detrimental…
Social Support and Lifestyle vs. Medical Diabetes Self-Management in the Diabetes Study of Northern California (DISTANCE)
In chronic illness self-care, social support may influence some health behaviors more than others. Examine social support's association with seven…
Associations Between Antidepressant Adherence and Shared Decision-Making, Patient-Provider Trust, and Communication Among Adults with Diabetes: Diabetes Study of Northern California (DISTANCE)
Depression and adherence to antidepressant treatment are important clinical concerns in diabetes care. While patient-provider communication patterns have been associated…
Low Socioeconomic Status is Associated with Increased Risk for Hypoglycemia in Diabetes Patients: The Diabetes Study of Northern California (DISTANCE)
Social risk factors for hypoglycemia are not well understood. Cross-sectional analysis from the DISTANCE study, a multi-language, ethnically-stratified random sample…
Spatial pattern of body mass index among adults in the diabetes study of Northern California (DISTANCE)
The role that environmental factors, such as neighborhood socioeconomics, food, and physical environment, play in the risk of obesity and…
The DISTANCE model for collaborative research: distributing analytic effort using scrambled data sets
Data-sharing is encouraged to fulfill the ethical responsibility to transform research data into public health knowledge, but data sharing carries…
Obesity and the Food Environment: Income and Ethnicity Differences Among People With Diabetes: The Diabetes Study of Northern California (DISTANCE)
It is unknown whether any association between neighborhood food environment and obesity varies according to individual income and/or race/ethnicity. The…
Neighborhood Deprivation and Change in BMI Among Adults With Type 2 Diabetes: The Diabetes Study of Northern California (DISTANCE)
To compare associations between neighborhood deprivation and measures of BMI change among adults with type 2 diabetes. Using data from…
Differences in the clinical recognition of depression in diabetes patients; the diabetes study of northern california (DISTANCE)
It is unknown to what extent the gap between need and care for depression among patients with diabetes differs across…
Health Literacy and Antidepressant Medication Adherence Among Adults with Diabetes; The Diabetes Study of Northern California (DISTANCE)
Previous studies have reported that health literacy limitations are associated with poorer disease control for chronic conditions, but have not…
Elevated Rates of Diabetes in Pacific Islanders and Asian Subgroups: The Diabetes Study of Northern California (DISTANCE)
OBJECTIVE: We estimated the prevalence and incidence of diabetes among specific subgroups of Asians and Pacific Islanders (APIs) in a…
Patient reported interpersonal processes of care and perceived social position: The Diabetes Study of Northern California (DISTANCE)
A patient's sense of his/her standing in the social hierarchy may impact interpersonal processes of care (IPC) within the patient-provider…
Ethnic Differences in Appointment-Keeping and Implications for the Patient-Centered Medical Home-Findings from the Diabetes Study of Northern California (DISTANCE)
OBJECTIVE: To examine ethnic differences in appointment-keeping in a managed care setting. DATA SOURCES/STUDY SETTING: Kaiser Permanente Diabetes Study of…
Place matters: Neighborhood deprivation and cardiometabolic risk factors in the Diabetes Study of Northern California (DISTANCE)
While neighborhood deprivation is associated with prevalence of chronic diseases, it is not well understood whether neighborhood deprivation is also…
Provider factors and patient-reported healthcare discrimination in the Diabetes Study of California (DISTANCE)
OBJECTIVE: We examined provider-level factors and reported discrimination in the healthcare setting. METHODS: With data from the Diabetes Study of…
Ethnic differences in the development of albuminuria: the DISTANCE study
Objectives: To determine whether ethnic differences in the incidence of albuminuria are present in patients with diabetes, and to identify…
Patient-Reported Racial/Ethnic Healthcare Provider Discrimination and Medication Intensification in the Diabetes Study of Northern California (DISTANCE)
BACKGROUND: Racial/ethnic minority patients are more likely to report experiences with discrimination in the healthcare setting, potentially leading to reduced…
Adherence to laboratory test requests by patients with diabetes: the Diabetes Study of Northern California (DISTANCE)
OBJECTIVES: To estimate rates and predictors of clinical laboratory test completion by patients with diabetes after provider referral. STUDY DESIGN:…
Heterogeneity of diabetes outcomes among asians and pacific islanders in the US; the diabetes study of northern california (DISTANCE)
OBJECTIVE: Ethnic minorities with diabetes typically have lower rates of cardiovascular outcomes and higher rates of end-stage renal disease (ESRD)…
Language barriers, physician-patient language concordance, and glycemic control among insured Latinos with diabetes: the Diabetes Study of Northern California (DISTANCE)
BACKGROUND: A significant proportion of US Latinos with diabetes have limited English proficiency (LEP). Whether language barriers in health care…
Correlates of patient-reported racial/ethnic health care discrimination in the Diabetes Study of Northern California (DISTANCE)
OBJECTIVES: We examined possible determinants of self-reported health care discrimination. METHODS: We examined survey data from the Diabetes Study of…
The impact of limited English proficiency and physician language concordance on reports of clinical interactions among patients with diabetes: the DISTANCE study
OBJECTIVE: To assess the association of limited English proficiency (LEP) and physician language concordance with patient reports of clinical interactions.…
Hypoglycemia is more common among type 2 diabetes patients with limited health literacy: the Diabetes Study of Northern California (DISTANCE)
BACKGROUND: Little is known about the frequency of significant hypoglycemic events in actual practice. Limited health literacy (HL) is common…
Social disparities in dental insurance and annual dental visits among medically insured patients with diabetes: the Diabetes Study of Northern California (DISTANCE) Survey
INTRODUCTION: People with diabetes are at increased risk of periodontal disease and tooth loss. Healthy People 2010 set a goal…
Ethnic differences in anemia among patients with diabetes mellitus: the Diabetes Study of Northern California (DISTANCE)
To examine ethnic differences in hemoglobin testing practices and to test the hypothesis that ethnicity is an independent predictor of…
The literacy divide: health literacy and the use of an internet-based patient portal in an integrated health system-results from the diabetes study of northern California (DISTANCE)
Internet-based patient portals are intended to improve access and quality, and will play an increasingly important role in health care,…
New prescription medication gaps: a comprehensive measure of adherence to new prescriptions
OBJECTIVE: Describe a novel approach to comprehensively summarize medication adherence. DATA SOURCES/STUDY SETTING: Kaiser Permanente Northern California Diabetes Registry (n…
Identifying risk factors for racial disparities in diabetes outcomes: the translating research into action for diabetes study
BACKGROUND: Versus whites, blacks with diabetes have poorer control of hemoglobin A1c (HbA1c), higher systolic blood pressure (SBP), and higher…
