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Low-socioeconomic-status enrollees in high-deductible plans reduced high-severity emergency care

Health Aff 32:1398-1406. Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, MA, USA One-third of US workers now have high-deductible health plans, and […]

Undiagnosed hypertension among young adults with regular primary care use

J Hypertens 32:65-74. University of Wisconsin School of Medicine and Public Health, Madison, WI; Veterans Affairs Pittsburgh Healthcare System and School of Pharmacy, University of […]

Age and gender differences in the prevalence and patterns of multimorbidity in the older population

BMC Geriatr 14:75. Department of Health Wellbeing and Family, Government of Aragón, Zaragoza, Spain BACKGROUND: The coexistence of several chronic diseases in one same individual, […]

The impact of influenza vaccination on hospitalizations and mortality among frail older people

J Am Med Dir Assoc 15:256-260. National Yang-Ming University, Taipei, Taiwan OBJECTIVES: The objective of this study was to evaluate the benefits of influenza vaccination […]

Federally qualified health center efficacy study

Montpelier, VT, USA: Vermont Program for Quality in Health Care. Vermont Program for Quality in Health Care, Montpelier, VT, USA OBJECTIVE: The objective of the […]

Homecare after pediatric traumatic brain injury: what do they use and how much does it cost?

Arch Phys Med Rehabil 96:e38. University Health Network, Toronto, ON, Canada Objective(s): To determine, by sex, the predictors, types, and direct cost of publicly funded […]

Trends in abdominal aneurysm surgery, 2002-2014

Toronto, ON, Canada: Institute for Clinical Evaluative Sciences (internal report). Institute for Clinical Evaluative Sciences, Toronto, ON, Canada Methods: We conducted a population-based cohort study […]

Building a predictive model for 30-day inpatient readmission using PROC PHREG

Presented at NESUG 2012. Baltimore, MD, USA: North East SAS User Group. Department of Health Policy and Management, Bloomberg School of Public Health, Johns Hopkins […]

Adverse selection, welfare and the optimal pricing of employer-sponsored health plans

St. Paul, MN, USA: University of Minnesota and NBER. University of Minnesota, St. Paul, MN, USA We assess the welfare impact of adverse selection in […]

Patterns of regional mental illness disorder diagnoses and service use in Manitoba: a population-based study

Winnepeg, MB, Canada: Manitoba Centre for Health Policy. Manitoba Centre for Health Policy, University of Manitoba, Winnipeg, MB, Canada Mental illness is a profound problem […]

Ambulatory Care Groups: an evaluation for military health care use

Fort Sam Houston, TX, USA: United States Army Center for Healthcare Education and Studies, publication #HR 94-004. United States Army Center for Healthcare Education and […]

Models for Medicare payment system reform based on group-specific volume performance standards (GVPS)

Waltham, MA, USA: Brandeis University. Brandeis University, Waltham, MA, USA This report discusses potential policy options for Medicare based on Group-Specific Volume Performance Standards (GVPS). […]

Aging in Ontario: an ICES chartbook of health service use by older adults

Toronto, ON, Canada: Institute for Clinical Evaluative Sciences. Institute for Clinical Evaluative Sciences, Toronto, ON, Canada Recent investments by the Ontario Ministry of Health and […]

Impacto economico de las enfermedades y pacientes atendidos en atencion primaria adaptacion de los Grupos Clinicos Adjustados (ACGs) en nuestro medio

Barcelona, Spain: University of Barcelona (doctoral dissertation). Published in Spanish. University of Barcelona, Barcelona, Spain El objetivo general de este trabajo es medir el impacto […]

Outcomes of care for South Carolina Medicaid managed care enrollees, state fiscal year 2007

Final report to the South Carolina Department of Health and Human Services. Columbia, SC, USA: University of South Carolina. University of South Carolina, Columbia, SC, […]

Primary health care reimbursement based on socioeconomics or disease burden

Primärvårdsersättning efter socioekonomi eller sjukdomsbörda. [Primary health care reimbursement based on socioeconomics or disease burden. Registry study from Östergötland shows different results depending on analysis […]

Implementation of electronic medical records and preventive services: a mixed methods study

Toronto, ON, Canada: University of Toronto (masters thesis). University of Toronto, Toronto, ON, Canada The implementation of Electronic Medical Records (EMRs) may lead to improved […]

Primärvården som koordinator för de mest sjuka äldre – implikationer för mål och indikatorer

In: Karlsson AK, Winberg H, ed. På väg mot en värdefull styrning. LHC Report: #1, 2012. Stockholm, Sweden: Stiftelsen Leading Health Care:150-172. Published in Swedish. […]

Demand for health among Canadians: roles of immigration status, country of origin, and year since migration

Toronto, ON, Canada: University of Toronto (doctoral dissertation). University of Toronto, Toronto, ON, Canada This thesis investigates the effects of immigration status, country of origin, […]

Complications following total joint arthroplasty in patients with rheumatoid arthritis

Toronto, ON, Canada: University of Toronto (doctoral dissertation). University of Toronto, Toronto, ON, Canada BACKGROUND: Total joint arthroplasty (TJA) is indicated in persons with end-stage […]

Working for Better Health in Wandsworth -The ACG System’s role in transforming services through innovative care models

Working for Better Health in Wandsworth -The ACG System’s role in transforming services through innovative care models

Leicester City CCG Case Study 1

Use of ACG® System output to support practices in participating in the Unplanned Admissions DES 2014-15

Predictive Models in the ACG® System: Recalibration of Existing Models and Development of New Ones

This short report provides details of the second recalibration of the existing models and the development of new models that was carried out by the […]

Health Care Reform In the US and England

The Johns Hopkins University Health Care Reform In the US and England: Commonalities and potential contribution of case-mix & predictive risk modeling tools Jonathan Weiner, […]

Applying the ACG® System to a Retrospective Electronic Database

Applying the Johns Hopkins ACG Applying the Johns Hopkins ACG Casemix Casemix System to a Retrospective Electronic Database: A 5 to a Retrospective Electronic Database: […]

Patient Identification with Incomplete Data

DST Health Solutions Patient Identification with Incomplete Data Kelsey Rauch

Tuesday(C6)-Refining Patient Risk Assessment with Clinical Lab Results-Lemke

Refining Patient Risk Assessment with Clinical Lab Results-Klaus Lemke

Tuesday(P3)-Moving the Chronic Care Model into the Future-Wagner

Moving the Chronic Care Model into the Future Ed Wagner, MD, MPH, MACP  MacColl Center for Health Care Innovation  Group Health Research Institute 

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The ACG System’s Inception

Donald Steinwachs, PhD, Professor, Health Policy and Management, Johns Hopkins Bloomberg School of Public Health goes through the history of the ACG System, the importance […]

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Care Management Program Case Study-Payer

Clalit Health (an integrated delivery system in Israel) used the ACG System to identify high-risk patients for enrollment in a comprehensive complex care management program for its multimorbid population. This led to a reduction in length of time spent in the hospital, reductions in readmission rates and lower costs.

Genetics Consultation Rates Following a Diagnosis of High-Grade Serous Ovarian Carcinoma in the Canadian Province of Ontario

Objective: In 2001, the province of Ontario expanded cancer genetic testing eligibility to include all women with high-grade serous ovarian carcinoma (HGSC) of the ovary, […]

Is case-mix adjustment in primary care at the mercy of coding quality? Yes … and no

BACKGROUND:  Primary care clinicians know that case-mix varies between different physician practices and geographical areas. Leicester City Clinical Commissioning Group (CCG) is now able to quantify […]

Effectiveness of a community care management program for multimorbid elderly patients with heart failure in the Veneto Region

Abstract Background The rapidly growing population of elderly subjects with multimorbidity is at risk of receiving fragmented and uncoordinated care, and have frequent hospitalizations and […]

Population risk and burden of health behavioral–related all-cause, premature, and amenable deaths in Ontario, Canada: Canadian Community Health Survey–linked mortality files

Abstract   Purpose To examine the association of all-cause and premature mortality with four modifiable lifestyle behaviors and quantify the burden of behavioral-related premature death in Ontario, […]

An instrumental variable approach quantifies and confirms the duration of pre-transplant dialysis has negative impact on kidney transplant recipient survival

Abstract Dialysis prior to kidney transplantation may have a detrimental effect on post-transplant Outcomes. However, prior studies have not fully characterized the nature of this […]

Interaction between neighborhood walkability and traffic-related air pollution on hypertension and diabetes: The CANHEART cohort

Abstract Background Living in unwalkable neighborhoods has been associated with heightened risk for diabetes and hypertension. However, highly walkable environments may have higher concentrations of […]

Understanding those overdue for cancer screening by five years or more: A retrospective cohort study in Ontario, Canada

Abstract Populations that are more than just slightly overdue for breast, cervical and colorectal screening should likely be targeted for policy and practice interventions. We […]

Association of Patient, Prescriber, and Region With the Initiation of First Prescription of Biologic Disease-Modifying Antirheumatic Drug Among Older Patients With Rheumatoid Arthritis and Identical Health Insurance Coverage

Abstract Importance Prescribing the first biologic treatment for rheumatoid arthritis (RA) is an important decision for patients, their physicians, and payers, with considerable costs and […]

Multimorbidity patterns in patients with heart failure: an observational Spanish study based on electronic health records

Abstract Objectives To characterise the comorbidities of heart failure (HF) in men and women, to explore their clustering into multimorbidity patterns, and to measure the […]

A Revised Classification Algorithm for Assessing Emergency Department Visit Severity of Populations

ABSTRACT Objectives: Analyses of emergency department (ED) use require visit classification algorithms based on administrative data. Our objectives were to present an expanded and revised version […]

Health care service usage and costs for high-needs elderly patients with heart failure

Abstract Background Heart failure (HF) has been defined as global disease of pandemic proportions, since it affects around 26 million people worldwide.[1] According to a recent […]

Personalized prediction of early childhood asthma persistence: A machine learning approach

Abstract Objective Early childhood asthma diagnosis is common; however, many children diagnosed before age 5 experience symptom resolution and it remains difficult to identify individuals […]

Association Between Surgical Approach and Major Surgical Complications in Patients Undergoing Total Hip Arthroplasty

Abstract Objective To determine whether an anterior approach is associated with lower risk of complications than either a lateral or posterior approach. Design, Setting, and […]

Effect of frailty on postoperative readmissions and cost of care for ovarian cancer

Abstract Objectives Frailty, defined as loss of reserve and vulnerability to changes in health, affects many ovarian cancer patients who are planned to undergo surgery. […]

Healthcare resource utilization in myeloproliferative neoplasms: a population-based study from Ontario, Canada

Abstract Background Health resource utilization (HRU) and associated factors of high cost are not well understood in myeloproliferative neoplasms (MPNs). Methods In this population-based, retrospective […]

Impact of Coronary Artery Severity and Revascularization Prior to Transcatheter Aortic Valve Implantation

Abstract Objective The prevalence of coexisting coronary artery disease (CAD) is high in patients who underwent transcatheter aortic valve implantation (TAVI). Our objective was to […]

Stratifying for Value: An Updated Population Health Risk Stratification Approach

Abstract Objective Most risk stratification approaches attempt to predict clinical outcomes rather than value. For a provider organization or health system to have financial success […]

Kidney Function and Potassium Monitoring After Initiation of Renin-Angiotensin-Aldosterone System Blockade Therapy and Outcomes in 2 North American Populations

Abstract Background: Clinical practice guidelines recommend routine kidney function and serum potassium testing within 30 days of initiating ACE (angiotensin-converting enzyme) inhibitor or angiotensin II […]

Factors Associated With Nonreceipt of Recommended COPD Medications

Abstract Background COPD medications reduce exacerbations and improve quality of life. Despite this, some individuals do not receive medications recommended by practice guidelines. Research Question […]

Performance of quantitative measures of multimorbidity: a population-based retrospective analysis

Abstract Background Multimorbidity measures are useful for resource planning, patient selection and prioritization, and factor adjustment in clinical practice, research, and benchmarking. We aimed to […]

Identifying Complex Patients Using Adjusted Clinical Groups Risk Stratification Tool

ABSTRACT Objectives To produce an efficient and practically implementable method, based on primary care data exclusively, to identify patients with complex care needs who have […]

Validating and Improving Adjusted Clinical Group’s Future Hospitalization and High-Cost Prediction Models for Dutch Primary Care

Abstract The rise in health care costs, caused by older and more complex patient populations, requires Population Health Management approaches including risk stratification. With risk […]

Understanding Data and Opportunities Focused on Value: A Single-Center Experience in Headache Care

Abstract Background and Objectives Headache syndromes are highly prevalent, disabling, and costly. Our goals were to (1) describe headache care delivery and costs in a […]

Mapping Healthcare Needs: A Systematic Review of Population Stratification Tools

Abstract Background and Aim: In 2021, healthcare expenditure in Italy represented 7.3% of the national gross domestic product, with approximately 80% attributed to the management […]

Is the Barthel index a valid tool for patient selection before urological surgery? A systematic review

Background The Barthel Index (BI) measures the level of patient independence in activities of daily living. This review aims to summarize current evidence on the […]

Gaps in the Hepatitis C Prenatal and Postpartum Care Cascade: Rationale for Treatment in Pregnancy

Abstract Background Hepatitis C virus (HCV) infections have increased among younger populations, including pregnant people. While universal screening guidelines have improved case-finding, studies suggest low […]

Social Risk Factors and Their Effect on Health Care Costs in a Midwestern Health Care System

Abstract Objectives: To assess how social risk factors and socioeconomic status (SES) affect health care costs at a large, integrated health system of 45 clinics […]

Access to primary care is associated with improved long-term survival after severe traumatic injury

ABSTRACT BACKGROUND Survivors of severe traumatic injury remain at elevated risk of death in the years after injury. Little is known about how long-term mortality […]

A cross-sectional analysis of staffing, activity, and patient need in general practice in England in 2023: a retrospective cohort study

Abstract Background: General practice in England is experiencing rising demand, workforce diversification, and widening health inequalities. However, there is limited empirical evidence describing how general […]

A population-based study on the impact of social determinants of health on time to treatment of stage I lung cancer in Ontario, Canada

Abstract Background Timely treatment of Stage I non-small cell lung cancer (NSCLC) is essential to improving outcomes, yet disparities persist in access to treatment across […]

Impact of a nurse-based intervention on medication outcomes in vulnerable older adults

Abstract Background Medication-related problems are common in older adults with multiple chronic conditions. We evaluated the impact of a nurse-based primary care intervention, based on […]

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Big Data Byte: Jonathan Weiner on analytics in population health

Dr. Jonathan Weiner participated as a featured presenter in the 2015 Big Data & Health Care Analytics forum in New York City. Watch the below […]

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ACG System Version 12.0

This presentation discusses the various v12.0 features such as refined risk assessment variables and enhanced analytics. Presented by Dr. Stephen Sutch. Learn more.

Family members of people with alcohol or drug dependence: health problems and medical cost compared to family members of people with diabetes and asthma

Addiction 104:203-214. Division of Research, Kaiser Permanente Northern California, Oakland, CA, USA AIMS: To compare the medical costs and prevalence of health conditions of family […]

Comparative analysis of outcome measures used in examining neurodevelopmental effects of early childhood anesthesia exposure

Anesthesiology 120:1319-1332. Columbia University, New York, NY, USA; University of Western Australia, Perth, Australia; Princess Margaret Hospital for Children, Perth, Australia; New York State Psychiatric […]

Inequities in ambulatory care and the relationship between socioeconomic status and respiratory hospitalizations: a population-based study of a Canadian city

Ann Fam Med 12:402-407. University of Manitoba, Winnipeg, MB, Canada PURPOSE: Individuals of lower socioeconomic status have higher rates of hospitalization due to ambulatory care-sensitive […]

Neurodevelopment of children exposed to anesthesia: design of the Mayo Anesthesia Safety in Kids (MASK) study

Contemp Clin Trials 41:45-54. Mayo Clinic, Rochester, MN, USA; Baylor College of Medicine, Houston, TX, USA; National Center for Toxicological Research, Food and Drug Administration, […]

Diagnosis and treatment of incident hypertension among patients with diabetes: a U.S. multi-disciplinary group practice observational study

J Gen Intern Med 30:768-776. University of Wisconsin, Madison, WI, USA BACKGROUND: Early hypertension control reduces the risk of cardiovascular complications among patients with diabetes […]

Comorbidity burden and health services use in community-living older adults with diabetes mellitus: a retrospective cohort study

Can J Diabetes 40:35-42. University of Alberta, Edmonton, AB, Canada; Institute for Clinical Evaluative Sciences, Toronto, ON, Canada; Women’s College Hospital, Toronto, ON, Canada; McMaster […]

Exploring indicators of use of costly health services in community-dwelling adults with multiple chronic conditions

Prof Case Manag 20:3-11. Mayo Clinic College of Medicine, Rochester, MN, USA; Mayo Clinic, Rochester, MN, USA; Case Western Reserve University, Cleveland, OH, USA Although […]

Comorbidity and the use of primary care and specialist care in the elderly

Ann Fam Med 3:215-222. Department of Health Policy and Management, Johns Hopkins School of Public Health, Baltimore, MD, USA PURPOSE: The impact of comorbidity on […]

All-cause mortality and serious cardiovascular events in people with hip and knee osteoarthritis: a population based cohort study

PLoS One 9:e91286. Women’s College Hospital, Toronto, ON, Canada; University of Toronto, Toronto, ON, Canada; Institute for Clinical Evaluative Sciences, Toronto, ON, Canada BACKGROUND: Because […]

Development and application of a population-oriented measure of ambulatory care case-mix

Med Care 29:452-472. Department of Health Policy and Management, Johns Hopkins University School of Hygiene and Public Health, Baltimore, MD, USA This article describes a […]

Adjusted Clinical Groups (ACGs) explain the utilization of primary care in Spain based on information registered in the medical records: a cross-sectional study

Health Policy 76:38-48. Centro de Salud Astrabudua, Consulado Bilbao, Bizkaia, Spain BACKGROUND: Previous studies have shown the validity of Adjusted Clinical Groups (ACGs) in the […]

Diabetes quality of care and outpatient utilization associated with electronic patient-provider messaging: a cross-sectional analysis

Diabetes Care 32:1182-1187. Department of Health Services, University of Washington School of Public Health and Community Medicine, Seattle, WA, USA OBJECTIVE: To test the hypothesis […]

Imputation of 10-year osteoporotic fracture rates from hip fractures: a clinical validation study.

J Bone Miner Res 25:388-392. Faculty of Medicine, University of Manitoba, Winnipeg, MB, Canada The World Health Organization (WHO) fracture risk assessment system (FRAX) allows […]

Differences in referral rates to specialised health care from four primary health care models in Klaipeda, Lithuania

BMC Fam Pract 9:63. Lund University, Department of Clinical Sciences in Malmö, General Practice/Family Medicine, Malmö, Sweden BACKGROUND: Lithuanian primary health care (PHC) is undergoing […]

Managing the gap: evaluating the impact of Medicaid managed care on preventive care receipt by child and adolescent minority populations

J Health Care Poor Underserved 21:92-111. St. Mary’s College of Maryland, St. Mary’s City, MD, USA The increased use of managed care in Medicaid warrants […]

Patient web services integrated with a shared medical record: patient use and satisfaction

J Am Med Inform Assoc 14:798-806. Center for Health Studies, Group Health Cooperative, Seattle, WA, USA OBJECTIVES: This study sought to describe the evolution, use, […]

Using the Johns Hopkins’ Aggregated Diagnosis Groups (ADGs) to predict 1-year mortality in population-based cohorts of patients with diabetes in Ontario, Canada

Diabet Med 29:1134-1141. Institute for Clinical Evaluative Sciences, University of Toronto, ON, Canada AIMS: There are limited validated methods to ascertain comorbidities for risk adjustment […]

Quantifying morbidity burdens and medical utilization of children with intellectual disabilities in Taiwan: A nationwide study using the ACG case-mix adjustment system

Res Dev Disabil 33:1270-1278. Department of Medical Affairs and Planning, Taipei Veterans General Hospital, Taipei City, Taiwan, ROC The purpose of this study was to […]

Is it necessary that some patients come to see us so often? Factors associated with primary care use in pediatrics

Gac Sanit 14:195-202. Published in Spanish. Centro de Salud de Astrabudúa (Bizkaia), Osakidetza-Servicio Vasco de Salud, Bilbao, Spain OBJECTIVES: To analyze the relationship between pediatric […]

Development of a claims-based risk score to identify obese individuals

Popul Health Manag 13:201-207. Division of General Internal Medicine, Department of Medicine, Johns Hopkins University, Baltimore, MD, USA Obesity is underdiagnosed, hampering system-based health promotion […]

Comparison of health care expenditures among insured users and nonusers of complementary and alternative medicine in Washington State: a cost minimization analysis

J Altern Complement Med 16:411-417. Department of Health Services, University of Washington, Seattle, WA, USA OBJECTIVES: The purpose of this analysis was to compare health […]

Guided care: cost and utilization outcomes in a pilot study

Dis Manag 11:29-36. Johns Hopkins HealthCare, Glen Burnie, MD, USA Guided Care (GC) is an enhancement to primary care that incorporates the operative principles of […]

Identifying frail older people using predictive modeling

Am J Manag Care 18:e392-e397. Department of Geriatric Medicine, Maccabi Healthcare Services, Tel Aviv, Israel OBJECTIVES: To determine whether a designation of frailty using the […]

A randomized study to decrease the use of potentially inappropriate medications among community-dwelling older adults in a southeastern managed care organization

Am J Manag Care 10:761-768. Department of Medicine and Center for Healthcare Improvement, Medical College of Georgia, Atlanta, Ga, USA BACKGROUND: Despite progress in describing […]

Development and validation of a model for predicting inpatient hospitalization

Med Care 50:131-139. Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health and School of Medicine, Baltimore, MD, USA BACKGROUND: Hospitalizations […]

Involuntary unemployment and mortality in Taiwan

J Formos Med Assoc 103:900-907. Institute of Public Health, National Yang-Ming University, Taipei, Taiwan. BACKGROUND AND PURPOSE: Unemployment is known to be associated with increased […]

Case-control study of antibiotic use and subsequent Clostridium difficile-associated diarrhea in hospitalized patients

Infect Control Hosp Epidemiol 29:44-50. Permanente Medical Group, Oakland, CA, USA OBJECTIVE: To determine which antibiotics increase or decrease the risk of Clostridium difficile-associated diarrhea […]

More preventive care, and fewer emergency room visits and prescription drugs–health care utilization in a consumer-driven health plan

Benefits Q 24:46-54. Healthcare Informatics, Blue Cross Blue Shield of Minnesota, USA. Although consumer-driven health plans (CDHPs) have grown dramatically, the question of whether CDHPs […]

Assessing comorbidity using claims data: an overview

Med Care 40:IV-26-IV-35. Health Services and Economics Branch, Applied Research Program, Division of Cancer Control and Population Sciences, National Cancer Institute, Bethesda, MD, USA Comorbidity, […]

Pharmacy- and diagnosis-based risk adjustment for children with Medicaid

Med Care 43:1155-1159. Center for Child and Adolescent Health Policy, MassGeneral Hospital for Children, Department of Pediatrics, Harvard Medical School, Boston, MA, USA BACKGROUND: Risk […]

The influence of incidental abdominal aortic aneurysm monitoring on patient outcomes

J Vasc Surg 54:1290-1297.e2. Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada BACKGROUND: Incidental abdominal aortic aneurysms (AAAs) are identified when the abdomen is […]

Population based study of long-term rates of surgery for urinary incontinence after radical prostatectomy for prostate cancer

J Urol 188:502-506. Division of Urology, Sunnybrook Health Sciences Centre, Sunnybrook Research Institute, Toronto, ON, Canada PURPOSE: Urinary incontinence can be a significant complication of […]