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Emergency department use among young adult Medicare beneficiaries with autism and intellectual disabilities

Abstract Background Individuals on the autism spectrum are at greater risk for a variety of co-occurring psychiatric and medical conditions, which could result in greater […]

Serious infections in patients with myasthenia gravis: population‐based cohort study

Abstract Background and purpose To characterize the frequency and risk of serious infections in patients with myasthenia gravis (MG) relative to age/sex/area‐matched comparators. Methods This […]

Declining Use of Red Blood Cell Transfusions for Gastrointestinal Cancer Surgery: A Population-Based Analysis

Abstract Background Gastrointestinal cancer surgery patients often develop perioperative anemia commonly treated with red blood cell (RBC) transfusions. Given the potential associated risks, evidence published […]

Impact of preoperative echocardiography on surgical delays and outcomes among adults with hip fracture

Aims Echocardiography is commonly used in hip fracture patients to evaluate perioperative cardiac risk. However, echocardiography that delays surgical repair may be harmful. The objective […]

90-90-90 for everyone?: Access to HIV care and treatment for people with HIV who experience imprisonment in Ontario, Canada

ABSTRACT Background We examined HIV care and treatment in prison and after release for people with HIV in Ontario, Canada, and compared HIV care and […]

Correlation between potentially inappropriate medication and Alzheimer’s disease among the elderly

Abstract Purpose This study is conducted to explore the association between potentially inappropriate medication (PIM) and Alzheimer’s disease (AD) among the elderly. Methods We used […]

Fracture Risk in Patients with Myasthenia Gravis: A Population-Based Cohort Study

Abstract Objective Prednisone is a common treatment for myasthenia gravis (MG), and osteoporosis is a known potential risk of chronic prednisone therapy. Our aim was […]

Impact of frailty on inpatient outcomes in thyroid cancer surgery: 10-year results from the U.S. national inpatient sample

Abstract Background Frailty is linked to perioperative morbidity and mortality. We evaluated the impact of preoperative frailty on inpatient outcomes of patients undergoing surgery for […]

Early postoperative follow-up reduces risk of late severe nutritional complications after Roux-En-Y gastric bypass: a population based study

Abstract Background Severe nutritional complications can occur following Roux-en-Y gastric bypass (RYGB). Adherence to follow-up visits can reduce the risk of many bariatric surgery complications, […]

Type 1 diabetes prevalence and incidence rates in the pediatric population of Veneto Region (Italy) in 2015–2020

Abstract The prevalence of Type 1 Diabetes (T1D) in the Veneto Region (Italy) in the 2015–2020 years was 152.5/100,000 subjects and the incidence 19.7/100,000 person-years. Accordingly, Veneto Region […]

Second and later-line erlotinib use in non-small cell lung cancer: real world outcomes and practice patterns overtime in Canada

Abstract Background In Canada, epidermal growth factor receptor (EGFR) inhibitor therapies in advanced non-small cell lung cancer (NSCLC) were initially approved regardless of EGFR status. The purpose […]

Patient Service Utilization Among Individuals with Co‑occurring Disorders: A Comparison of Two Models of Care Coordination

Abstract Background Healthcare systems have increasingly adopted integrated care models with demonstrated effectiveness. However, few studies examine integrated care for individuals with co-morbid mental illness […]

Effectiveness of COVID-19 vaccines against symptomatic SARS-CoV-2 infection and severe outcomes with variants of concern in Ontario

Abstract SARS-CoV-2 variants of concern (VOC) are more transmissible and may have the potential for increased disease severity and decreased vaccine effectiveness. We estimated the […]

Assessing the Added Value of Vital Signs Extracted from Electronic Health Records in Healthcare Risk Adjustment Models

Abstract Objective Patient vital signs are related to specific health risks and outcomes but are underutilized in the prediction of health-care utilization and cost. To […]

Hip Fractures in Adults with Schizophrenia: A Population-based Evaluation of the Burden and Quality of Care

Abstract Hip fractures have life-altering consequences. Individuals with schizophrenia may experience a higher likelihood of hip fractures, worse postfracture outcomes, and suboptimal care. This thesis […]

Impact of Immigration Status on Survival Among Stage 1 and 2 HER2-Positive and Triple-Negative Breast Cancer in Ontario, Canada

ABSTRACT Background This study examined death from breast cancer and death from other causes among women with Stage 1 and 2 Her2-positive and triple-negative breast […]

The Impact of Frailty on Short-Term Outcomes After Surgery for Zenker Diverticulum

Abstract Objective Determine relationship between frailty and hospital mortality, length of stay, cost, and medical and surgical complications in Zenker diverticulum surgery. Study Design Retrospective […]

Implementation, impact of vaccination coverage and determinants of VZV immunization in people living with HIV: The HIV-ZoVax study

Abstract Background Shingles remains a significant cause of morbidity in people living with HIV despite advances in antiretroviral therapy. The recombinant zoster vaccine (RZV) is […]

Primary care utilization and attachment among burn survivors: A population-based matched cohort study

Abstract Background Many burn survivors experience poor long-term outcomes, including reduced quality of life and greater mortality than the general population, yet post-discharge interventions to […]

Developing and validating an electronic health record-embedded AI model for managing multimorbid hospitalisation risk in patients with chronic RESpiratory disease (AiRES): a study protocol

Abstract Background Chronic respiratory diseases (CRDs), such as asthma and chronic obstructive pulmonary disease (COPD), are heterogeneous conditions with a high multimorbidity burden. However, existing risk […]

Continuity in a fragmented healthcare system – organizational and individual determinants

Abstract Background Continuity of care is key for high-quality primary care, associated with improved health outcomes, reduced mortality and more efficient use of resources. Achieving […]

Improving Prediction of Risk of Admission to Long-Term Care or Mortality Among Home Care Users With IDD

ABSTRACT Background Frailty is an established predictor of admission into long-term care (LTC) and mortality in the elderly population. Assessment of frailty among adults with […]

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Identifying High-Risk Medicare Advantage Enrollees

Early identification of high-risk members provides the opportunity to manage the complex needs of this population. After one month in the plan, more than 50% […]

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Case Mix Adjustment in Practice

In this webinar, builds upon the introduction to the concept of case mix in the previous webinar and will share how case mix adjustment can […]

Improving the quality of outpatient care for older patients with diabetes: lessons from a comparison of rural and urban communities

J Fam Pract 50:676-680. University of Washington, Department of Family Medicine, Seattle, WA, USA OBJECTIVE: Our goal was to compare the quality of diabetic care […]

Why do physicians vary so widely in their referral rates?

J Gen Intern Med 15:163-168. Department of Family Medicine, University of Rochester, Rochester, NY, USA OBJECTIVE: To determine which physician practice and psychological factors contribute […]

Assessing population health care need using a claims-based ACG morbidity measure: a validation analysis in the province of Manitoba

Health Serv Res 37:1345-1364. Centre for Health Services and Policy Research, University of British Columbia, Vancouver, BC, Canada OBJECTIVES: To assess the ability of an […]

Health care costs, utilization and patterns of care following Lyme disease

PLoS One 10:e0116767. Johns Hopkins Bloomberg University, Baltimore, MD, USA BACKGROUND: Lyme disease is the most frequently reported vector borne infection in the United States. […]

Palliative care and the aggressiveness of end-of-life care in patients with advanced pancreatic cancer

J Natl Cancer Inst 107:p11: kju424. University Health Network, Toronto, ON, Canada; Institute of Medical Sciences, Toronto, ON, Canada BACKGROUND: We examined the impact of […]

Predicting costs of care using a pharmacy-based measure risk adjustment in a veteran population

Med Care 41:753-760. VA Puget Sound Health Care System, Seattle, WA, USA BACKGROUND: Although most widely used risk adjustment systems use diagnosis data to classify […]

Process of care for Medicaid-enrolled children with asthma: served by community health centers and other providers

Med Care 40:303-314. Institute for Health Care Research and Policy, Georgetown Public Policy Institute, Georgetown University, Washington, DC, USA OBJECTIVE: To compare the process of […]

A population-based study evaluating family physicians’ HIV experience and care of people living with HIV in Ontario

Ann Fam Med 13:436-445. Bruyère Research Institute, Ottawa, ON, Canada; University of Ottawa, Ottawa, ON, Canada; Ottawa Hospital Research Institute, Ottawa, ON, Canada; Institute for […]

Sex disparities in post-acute myocardial infarction pharmacologic treatment initiation and adherence: problem for young women

Circ Cardiovasc Qual Outcomes 8:586-592. University of British Columbia, Vancouver, BC, Canada BACKGROUND: The prevalence of the use of secondary prevention cardiovascular medications is lower […]

Increased surgeon experience with rheumatoid arthritis reduces the risk of complications following total joint arthroplasty

Arthritis Rheumatol 66:488-496. University of Toronto and Women’s College Hospital, Toronto, ON, Canada OBJECTIVE: To determine the relationship between surgeon experience with, and complications following, […]

Prevalence, expenditures, and complications of multiple chronic conditions in the elderly

Arch Intern Med 162:2269-2276. Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA BACKGROUND: The prevalence, health care […]

Ambulatory care groups: a categorization of diagnoses for research and management

Health Serv Res 26:53-74. Department of Health Policy and Management, Johns Hopkins School of Hygiene and Public Health, Baltimore, MD, USA This article describes a […]

Using the Johns Hopkins aggregated diagnosis groups (ADGs) to predict mortality in a general adult population cohort in Ontario, Canada

Med Care 49:932-939. Institute for Clinical Evaluative Sciences, Department of Health Management, Policy and Evaluation, University of Ottawa, Ottawa, ON, Canada BACKGROUND: Administrative healthcare databases […]

Preventable hospitalizations and socioeconomic status.

Health Aff 17:177-189. Wagner Graduate School, New York University, New York, NY, USA. “Preventable” hospitalizations have been proposed as indicators of poor health plan performance. […]

Applying diagnosis and pharmacy-based risk models to predict pharmacy use in Aragon, Spain: the impact of a local calibration

BMC Health Serv Res 10:22. Aragon Health Science Institute, Zaragoza, Spain BACKGROUND: In the financing of a national health system, where pharmaceutical spending is one […]

Ambulatory Care Groups and the profiling of primary care physician resource use: examining the application of case mix adjustments

J Ambul Care Manage 19:86-89. Center for Research in Ambulatory Health Care Administration, Englewood, CO, USA A variety of profiling models and tools is utilized […]

Ambulatory specialist use by nonhospitalized patients in us health plans: correlates and consequences

J Ambul Care Manage 32:216-225. Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA Approximately 7 of 10 (and 95% of the elderly) people […]

Impact of comorbidity on the individual’s choice of primary health care provider

Scand J Prim Health Care 29:104-109. Lund University, Department of Clinical Sciences in Malmö, General Practice/Family Medicine, Malmö, Sweden OBJECTIVE. This study examined whether age, […]

Comparing asthma care provided to Medicaid-enrolled children in a primary care case manager plan and a staff model HMO

Ambul Pediatr 3:253-262. Health Policy Institute, Georgetown University, Washington, DC, USA OBJECTIVE: To examine differences in selected processes of asthma care provided to Medicaid-enrolled children […]

Economic profiling of primary care physicians: consistency among risk-adjusted measures

Health Serv Res 39:985-1003. Health Management and Policy, University of Michigan, Ann Arbor, MI, USA OBJECTIVE: To investigate whether different risk-adjustment methodologies and economic profiling […]

Access intervention in an integrated, prepaid group practice: effects on primary care physician productivity

Health Serv Res 43:1888-1905. Department of Health Services, University of Washington, Seattle, WA, USA OBJECTIVE: To estimate the joint effect of a multifaceted access intervention […]

Risk classification of adult primary care patients by self-reported quality of life

Med Care 43:189-193. Department of Community and Family Medicine, Duke University Medical Center, Durham, NC, USA BACKGROUND: Although patient-reported health-related quality of life (HRQOL) is […]

Sleep complaints and their association with comorbidity and health-related quality of life in an older population in Sweden

Aging Ment Health 15:204-213. School of Health Science, Blekinge Institute of Technology, Karlskrona, Sweden OBJECTIVE: The relationship between sleep complaints, comorbidity and health-related quality of […]

Patients with atrial fibrillation and an alternative primary diagnosis in the emergency department: a description of their characteristics and outcomes

Acad Emerg Med 20:193-199. Institute for Clinical Evaluative Sciences, Toronto, ON, Canada OBJECTIVES: Atrial fibrillation is common in the emergency department (ED). Mortality rates at […]

Adverse events in elderly users of antipsychotic pharmacotherapy in the province of Manitoba: a retrospective cohort study

J Clin Psychopharmacol 33:24-30. University of Manitoba, Winnipeg, MB, Canada. BACKGROUND: Antipsychotic medications have been widely used in elderly patients for treatment of a variety […]

Emergency department use by the rural elderly

J Emerg Med 18:289-297. Department of Family Medicine, University of Washington, Seattle, WA, USA This study uses Medicare data to compare emergency department (ED) use […]

The potential of risk adjustment for the Military Health System TRICARE Program

Mil ed 170:964-971. AdvanceMed/CSC, Plaza America Drive, Reston, VA, USA Using industry leading methods and software products, this article explores the potential for health risk […]

The effects of interdisciplinary outpatient geriatrics on the use, costs and quality of health services in the fee-for-service environment

Aging Clin Exp Res 20:556-561. Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA BACKGROUND AND AIMS: To evaluate the effect of interdisciplinary outpatient […]

The relationship between effectiveness and costs measured by a risk-adjusted case-mix system: multicentre study of Catalonian population data bases

BMC Public Health 9:202. Directorate of Planning, Badalona Serveis Assistencials SA, Badalona, Barcelona, Spain BACKGROUND: The main objective of this study is to measure the […]

Adjusted Clinical Groups use at a Spanish primary care center: a retrospective, population-based study

Rev Panam Salud Publica 27:49-55. Published in Spanish. Dirección de Planificación, Badalona Serveis Assistencials, S.A., Barcelona, Spain OBJECTIVES: To evaluate the results of implementing a […]

What is the comparative health status and associated risk factors for the Metis? A population-based study in Manitoba, Canada

BMC Public Health 11:814. Manitoba Centre for Health Policy, University of Manitoba, Winnipeg, MB, Canada BACKGROUND: Métis are descendants of early 17th century relationships between […]

Impact of bariatric surgery on health care utilization and costs among patients with diabetes

Med Care 50:58-65. Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA BACKGROUND: The effect of bariatric surgery […]

Case-mix adjusting performance measures in a veteran population: pharmacy- and diagnosis-based approaches

Health Serv Res 38:1319-1337. VA Puget Sound Health Care System, Seattle, WA, USA OBJECTIVE: To compare the rankings for health care utilization performance measures at […]

Risk adjusting capitation: applications in employed and disabled populations

Health Care Manag Sci 3:101-109. Department of Health Services, University of Washington, Seattle, WA, USA Risk adjustment may be a sensible strategy to reduce selection […]

Use of risk adjustment in setting budgets and measuring performance in primary care I: how it works

BMJ 323:604-607. School of Public Policy, University College London, London, UK No abstract PMID: 11557709 PMCID: PMC55577

Are low-income elderly patients at risk for poor diabetes care?

Diabetes Care 27:1060-1065. Colorado Foundation for Medical Care, Denver, CO, USA OBJECTIVE: Diabetes is common among low-income elderly, dual-eligible (DE) Medicare/Medicaid patients resulting in significant […]

Obtaining the mean relative weights of the cost of care in Catalonia (Spain): retrospective application of the Adjusted Clinical Groups case-mix system in primary health care

J Eval Clin Pract 19:267-276. Directorate of Planning, Badalona Serveis Assistencials SA, Badalona, Spain OBJECTIVE: The study aims to obtain the mean relative weights (MRWs) […]

Exploratory analysis of high CT scan utilization in claims data

J Am Coll Radiol 11:51-58. University of Minnesota, Minneapolis, MN. USA; Arizona State University, Tempe, AZ, USA PURPOSE: This study explores characteristics that distinguish higher […]

Increased risk of complications following total joint arthroplasty in patients with rheumatoid arthritis

Arthritis Rheumatol 66:254-263. University of Toronto, Toronto, ON, Canada OBJECTIVE: Most of the evidence regarding complications following total hip arthroplasty (THA) and total knee arthroplasty […]

High-risk case identification for use in comprehensive complex care management

Popul Health Manag. Clalit Research Institute , Chief Physician’s Office, Clalit Health Services, Tel Aviv, Israel . The current study aimed to develop a patient […]

Association of the Hospital Volume of Frail Surgical Patients Cared for with Outcomes after Elective, Major Noncardiac Surgery

Background: Frailty is a risk factor for adverse postoperative outcomes. Hospitals that perform higher volumes of surgery have better outcomes than low-volume providers. We hypothesized […]

A health insurance plan with wellness features

Ithaca, NY, USA: Cornell University (doctoral dissertation). Cornell University, Ithaca, NY, USA Employers are increasingly using wellness programs to improve health and lifestyle of employees. […]

Medi-Cal and managed care: risk, costs, and regional variation

Sacramento, CA, USA: Public Policy Institute of California. Rollins School of Public Health, Emory University, Atlanta, GA; School of Public Health, University of Alabama at […]

Impact of center case volume on cardiotoxicity during adjuvant trastuzumab in breast cancer

2013 American Society of Clinical Oncology Annual Meeting. Abstract 6625. J Clin Oncol 31 (suppl; abstr 6625). University of Toronto, Toronto, ON, Canada; St. Michael’s […]

Mesurer la morbidite chez les patients diabetiques a Montreal.

Montreal, QC, Canada: Montreal Health and Social Services Agency. Published in French. Montreal Health and Social Services Agency, Montreal, QC, Canada No abstract

The actual versus expected health care use among Healthy Kids enrollees

Gainesville, FL, USA: Institute for Child Health Policy, University of Florida. Institute for Child Health Policy, University of Florida, Gainesville, FL, USA As part of […]

Ambulatory case-mix methodologies: applications to primary care research

In: Grady M, eds. Primary care research: theory and methods. Washington, DC: USDHHS. AHCPR Pub 91-0011:75-81. Johns Hopkins University, Baltimore, MD, USA This paper describes […]

Differences in case mix between CHC users and non users: Washington and Missouri

MDS Associates, Laguna Research Associates. Final report to the Bureau of Primary Health Care. Wheaton, MD, USA: MDS Associates. Wheaton, MD, USA; San Francisco, CA, […]

A comparative analysis of claims-based methods of health risk assessment for commercial populations

Minneapolis, MN, USA: Milliman USA and Park Nicollet Institute Health Research Center. Milliman USA and Park Nicollet Institute Health Research Center, Minneapolis, MN, USA The […]

Effect of patient cost sharing in South Korea: ACG risk-adjusted differences in health care utilization and expenditures among National Health Insurance and Medical Aid enrollees, 2004-2005

Baltimore, MD, USA: Johns Hopkins University (doctoral dissertation). Johns Hopkins University, Baltimore, MD, USA Korea has experienced a period of rapid economic development and industrialization […]

Provider profiling: implementation issues within Florida MediPass

Gainesville, FL, USA: University of Florida. University of Florida, Gainesville, FL, USA Provider profiling use epidemiological methods to compare physician practice  patterns across various dimensions […]

Using the ACG casemix system in population health management programs at Johns Hopkins

BMC Health Serv Res 9:A16. Johns Hopkins HealthCare, Glen Burnie, MD, USA   Introduction: Johns Hopkins HealthCare contracts with the US Department  of Defense (DOD) […]

Who uses exenatide for glucose control in diabetes mellitus?

A retrospective cohort study of a new therapy? Rockville, MD, USA: Agency for Healthcare Research and Quality. Johns Hopkins University, Baltimore, MD, USA BACKGROUND: Exenatide […]

Direct costs of hip fractures among seniors in Ontario

Toronto, ON, Canada: University of Toronto (masters thesis). University of Toronto, Toronto, ON, Canada Osteoporosis is a major public health problem resulting in substantial hip […]

Electronic patient provider communication in diabetes care

Seattle, WA, USA: University of Washington (doctoral dissertation). University of Washington, Seattle, WA, USA Diabetes is a chronic illness of increasing public health importance affecting […]

Measuring health status for risk adjusting capitation payments

Hamilton, NJ, USA: Center for Health Care Strategies. Center for Health Care Strategies, Hamilton, NJ, USA In this report we describe six health status grouping […]

Asthma drug regimen optimality and health services utilization: a population-based analysis in British Columbia

Vancouver, BC, Canada: University of British Columbia (doctoral dissertation). University of British Columbia, Vancouver, BC, Canada BACKGROUND: Drug therapy is the mainstay medical treatment for […]

Identifying People at Increased Risk of Severe Illness from COVID-19 in the UK

During the current pandemic, NHS stakeholders need to identify their most vulnerable patient populations. This short report shares how insights from the ACG System can […]

Introduction to the ACG System

Johns Hopkins Bloomberg School of Public Health Population Based Casemix- An Introduction to the ACG System Dr Peter F. S. Lee

Tuesday-Re-thinking ACG fundamentals-Low

Clalit Profiling Morbidity Burden in Primary Care: Local Calibration of a Case-Mix Model to Account for the Burden Israeli Primary Care Physicians Face Ran D. […]

Monday-US Health Reform-Gootee

MZI HealthCare A Population Health Model for Physician Reimbursement: A Hybrid Approach Greg Gootee, MBA

Monday-Care Coordination II-Jabaar

Discovery Health A Virtually Integrated Care Delivery Model for Complex, High-Needs Patients Riedwaan Jabaar

LookingBackLookingForward

Johns Hopkins Bloomberg School of Public Health Looking Back, Looking Forward: Johns Hopkins ACG System Improving Health Care Worldwide for 30 Years Professor Jonathan P. […]

2014 Reform Preparation: What Health Plans Need to Know Now!

DST Health Solutions 2014 Reform Preparation: What Health Plans Need to Know Now! Teri Mullaney, Chief Strategy Officer

Monday(C5)-Expanding the clinical toolbox for progressive healthcare intervention —Lizelle Steenkamp

Expanding the clinical toolbox for progressive healthcare intervention —Lizelle Steenkamp, Discovery Health 

Tuesday(P2)-Reaching The EMR / e-Health Tipping Point: Implications for the Future of Health Care and Population Health-Jonathan P. Weiner DrPH

Reaching The EMR / e-Health Tipping Point:  Implications for the Future of Health Care and Population Health  —Jonathan P. Weiner, DrPH  Professor of Health Policy […]

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About the ACG System V11.0 Release

In this video, Chad Abrams, M.A.; Director of U.S. Operations, ACG System; briefly describes the Johns Hopkins ACG System highlighting features included in the software’s version 11 release. Learn more.

Comparing Population-based Risk-stratification Model Performance Using Demographic, Diagnosis and Medication Data Extracted From Outpatient Electronic Health Records Versus Administrative Claims.

Department of Health Policy and Management, Johns Hopkins School of Public Health, Center for Population Health Information Technology, Baltimore, MD HealthPartners, Health Informatics Division, Bloomington, […]

Uptake of the Periodic Health Exam Among Adults With Intellectual and Developmental Disabilities from 2003 to 2015

Background: Over the past decade, annual heath exams have been de-emphasized for the general population but emphasized for adults with intellectual and developmental disabilities (IDD). […]

Assessing the Impact of Body Mass Index Information on the Performance of Risk Adjustment Models in Predicting Health Care Costs and Utilization

Abstract BACKGROUND: Using electronic health records (EHRs) for population risk stratification has gained attention in recent years. Compared with insurance claims, EHRs offer novel data […]

Days at Home in the Last 6 Months of Life: A Patient-Determined Quality Indicator for Cancer Care

ABSTRACT   PURPOSE: Quality end-of-life care (EoLC) is a key aspect of oncology. Days at home in the last 6 months of life represents a […]

Population Health Management Exploiting Machine Learning Algorithms to Identify High-Risk Patients

Abstract Population aging and the increase of chronic conditions incidence and prevalence produce a higher risk of hospitalization or death. This is particularly high for […]

Neuropsychological and Behavioral Outcomes after Exposure of Young Children to Procedures Requiring General Anesthesia

Abstract   BACKGROUND Few studies of how exposure of children to anesthesia may affect neurodevelopment employ comprehensive neuropsychological assessments. This study tested the hypothesis that […]