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Peri‐complication diagnosis of hepatitis C infection: Risk factors and trends over time

Abstract Background & Aims Hepatitis C virus (HCV) is a common and treatable cause of cirrhosis and its complications, yet many chronically infected individuals remain […]

Using Health Plan Authorization Data to Predict Hospitalizations and Readmissions in a Combined Commercial and Medicaid Population

Abstract Health plans develop predictive models to predict key clinical events (eg, admissions, readmissions, emergency department visits). The authors developed predictive models of admissions and […]

Association between socioeconomic deprivation and surgical complications in adults undergoing ankle fracture fixation: a population-based analysis

Abstract Background Few studies have investigated the outcomes of surgical fracture care among socially deprived patients despite the increased incidence of fractures and the inequality […]

Breast cancer diagnosis and treatment wait times in specialized diagnostic units compared with usual care: a population-based study

Abstract Background Breast assessment sites (bass) were developed to provide expedited and coordinated care for patients being evaluated for breast cancer (bca) in Ontario. We […]

Epidemiology and Impact of Spinal Cord Injury in the Elderly: Results of a Fifteen-Year Population-Based Cohort Study

Abstract Objective Although experience suggests a shift in the epidemiology of spinal cord injury (SCI) toward an older demographic, population studies are lacking. We aimed […]

Systematic review on the instruments used for measuring the association of the level of multimorbidity and clinically important outcomes

ABSTRACT Objectives There are multiple instruments for measuring multimorbidity. The main objective of this systematic review was to provide a list of instruments that are […]

Inequities in access to primary care among opioid recipients in Ontario, Canada: A population-based cohort study

Abstract Background Stigma and high-care needs can present barriers to the provision of high-quality primary care for people with opioid use disorder (OUD) and those […]

Prevalence, determinants, and outcomes of SARS-COV-2 infection among cancer patients. A population-based study in northern Italy

Abstract Background It is well established that cancer patients infected with SARSCoV-2 are at particularly elevated risk of adverse outcomes, but the comparison of SARS-CoV-2 […]

Outcomes after the regionalization of care for high-grade endometrial cancers: a population-based study

Abstract Background In June 2013, Ontario Health (Cancer Care Ontario), the agency responsible for advancing cancer care in Ontario, Canada, published practice guidelines recommending that […]

Pre-operative wait times in high-grade non-endometrioid endometrial cancer: Do surgical delays impact patient survival?

Abstract Objective Practice guidelines advocating for regionalization of endometrial cancer surgery to gynecologic oncologists practicing in designated gynecologic oncology centres were published in Ontario in […]

Patterns Of Multimorbidity Of Patients In Geriatric Care – A Register-Based Cohort Study In Sweden

Abstract Background Patients in geriatric care display a high degree of multimorbidity. We aimed to explore and visualise various patterns of multimorbidity in a person-oriented […]

Impact of Social Needs in Electronic Health Records and Claims on Health Care Utilization and Costs Risk-Adjustment Models Within Medicaid Population

Abstract Patients enrolled in Medicaid have significantly higher social needs (SNs) than others. Using claims and electronic health records (EHRs) data, managed care organizations (MCOs) […]

Creating a Cost-map From Claims Data to Guide Improvement Actions for Children With Asthma

Abstract Purpose It is difficult to reduce cost and improve quality without knowledge pertaining to the distribution of expenses in the population in question. We […]

Risk Stratification with only EHR Data – White Paper

Risk stratification models have traditionally used medical and pharmacy claims data combined with other sources, such as electronic health records (EHRs).  But provider organizations often […]

Reducing Emergency Department Use

People usually go to the Emergency Department (ED) when they are experiencing a medical emergency. But some people choose the ED for non-urgent care, which […]

Case Mix Measurement

This webinar provides an introduction to the principle of case mix and the constructs within the ACG System that make this possible. This session is a […]

Applications of the ACG System in the UK

This white paper provides an overview of the ACG System and how it is being used to support a range of clinical and commissioning activities […]

Physician referral rates: style without much substance?

Med Care 38:836-846. Department of Family Medicine, University of Rochester, New York, NY, USA BACKGROUND: Primary care physicians (PCPs) exhibit widely varying referral rates, resulting […]

Constructing ”behavioral” comparison groups: a difference-in-difference analysis of the effect of copayment based on the patient’s price elasticity

Eval Health Prof 37:434-456. National Kaohsiung First University of Science and Technology, Kaohsiung, Taiwan It is well known that the differences-in-differences (DD) estimator is based […]

Revisiting the economic efficiencies of observation units

Manag Care 24:46-52. University of Texas, Houston, TX, USA; Michael E. DeBakey Veterans Affairs Medical Center HSR&D, Houston, TX, USA; Baylor College of Medicine, Houston, […]

Profiling resource use: do different outcomes affect assessments of provider efficiency?

Am J Manag Care 8:1105-1115. Center for Health Quality, Outcomes and Economic Research, Bedford Veterans Affairs Medical Center, Bedford, MA, USA OBJECTIVES: To examine whether […]

The case for case-mix adjustment in practice profiling. When good apples look bad

JAMA 272:871-874. Harvard Community Health Plan, Brookline, MA, USA OBJECTIVE: To assess the influence of patient characteristics on practice profiling. Using the example of specialty […]

The patient-centered medical home and associations with health care quality and utilization: a 5-year cohort study

Ann Intern Med 164:395-405. Weill Cornell Medical College, New York, NY, USA BACKGROUND: Effects of the patient-centered medical home (PCMH) are unclear. Previous studies had […]

Association between electronic health records and health care utilization

Appl Clin Inform 6:42-55. Weill Cornell Medical College, New York, NY, USA BACKGROUND: The federal government is investing approximately $20 billion in electronic health records […]

Indication for pharmacological treatment is often lacking: a cross-sectional study on the quality of drug therapy among the elderly

BMC Geriatr 15:117. Lund University, Malmö, Sweden; Stanford University School of Medicine, Stanford, CA, USA; University of Southern Denmark, Odense C, Denmark BACKGROUND: Although the […]

Infliximab in ulcerative colitis: the impact of preoperative treatment on rates of colectomy and prescribing practices in the province of British Columbia, Canada

Dis Colon Rectum 57:83-90. University of British Columbia, Vancouver, BC, Canada BACKGROUND: Approximately 20% of patients with ulcerative colitis will require surgical treatment. Recent data […]

Effect of practice variation on resource utilization in infants hospitalized for viral lower respiratory illness.

Pediatrics 108:851-855. University of Virginia Children’s Medical Center, Charlottesville, Virginia, USA OBJECTIVE: Hospital care for children with viral lower respiratory illness (VLRI) is highly variable, […]

Benefits and pitfalls in applying the experience of prepaid group practices to the U.S. physician supply

Health Aff W4:73-75. Center for Health Workforce Studies, School of Public Health, University at Albany, State University of New York, Rensselaer, NY, USA The paper […]

Does a diagnosis of schizophrenia reduce rates of mammography screening? A Manitoba population-based study

Schizophr Res 113:95-100. Department of Psychiatry, University of Manitoba, CancerCare Manitoba, Winnipeg, MB, Canada It is estimated that mammography screening can reduce mortality from breast […]

Using multiple data features improved the validity of osteoporosis case ascertainment from administrative databases.

J Clin Epidemiol 61:1250-1260. Manitoba Centre for Health Policy, University of Manitoba, Winnipeg, MB, Canada OBJECTIVES: The aim was to construct and validate algorithms for […]

Risk adjustment in health insurance exchanges for individuals with mental illness

Am J Psychiatry 169:704-709. Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA OBJECTIVE: In 2014, an estimated […]

Prevalence of health problems and primary care physicians’ specialty referral decisions

J Fam Pract 50:427-432. Health Services Research and Development Center, Department of Health Policy and Management, Johns Hopkins School of Hygiene and Public Health, Baltimore, […]

Early dropout from psychotherapy for depression with group- and network-model therapists

Adm Policy Ment Health 39:440-447. Group Health Research Institute, Seattle, WA, USA Administrative data were used to examine early dropout among 16,451 health plan members […]

Using the Johns Hopkins Aggregated Diagnosis Groups (ADGs) to predict mortality in a population-based cohort of adults with schizophrenia in Ontario, Canada

Psychiatry Res 196:32-37. Institute for Clinical Evaluative Sciences, University of Toronto, Toronto, ON, Canad Administrative health care databases are increasingly used for health services and […]

Multimorbidity patterns in primary care: interactions among chronic diseases using factor analysis

PLoS One 7:e32190. IIS Aragón, Aragón Health Sciences Institute, Miguel Servet University Hospital, University of Zaragoza, Zaragoza, Spain OBJECTIVES: The primary objective of this study […]

The effect of capitation on switching primary care physicians

Health Serv Res 38:191-209. University of Rochester School of Medicine and Dentistry, Department of Community and Preventive Medicine, Rochester, NY, USA OBJECTIVE: To examine the […]

How well do Ambulatory Care Groups predict expenditures on mental health and substance abuse patients?

Adm Policy Ment Health 24:339-357. Department of Health Care Policy, Harvard Medical School, Boston, MA, USA This paper evaluates the ability of Ambulatory Care Groups […]

Stratification of the population in the Basque Country: results in the first year of implementation

Aten Primaria 45:54-60. Published in Spanish. Instituto Vasco de Innovación Sanitaria, Sondika, Bizkaia, Spain Predictive models allow populations to be stratified according to their health […]

Triumph of hope over experience: learning from interventions to reduce avoidable hospital admissions identified through an Academic Health and Social Care Network

BMC Health Serv Res 12:153. Department of Health Care Management and Policy, University of Surrey, Guildford, UK BACKGROUND: Internationally health services are facing increasing demands […]

Comorbidity-based payment methodology for Medicaid enrollees with HIV/AIDS

Health Care Financ Rev 23:53-68. Center for Health Program Development and Management, University of Maryland Baltimore County, Baltimore, MD, USA Managed care organizations (MCOs) may […]

Monitoring the prevalence of chronic conditions: which data should we use?

BMC Health Serv Res 12:365. Osakidetza, Basque Health Service, C/ Alava n° 45, Vitoria-Gazteiz, Spain BACKGROUND: Chronic diseases are an increasing threat to people’s health […]

Effect of patient socioeconomic status on physician profiles for prevention, disease management, and diagnostic testing costs

Med Care 40:717-724. Department of Family and Community Medicine, University of California School of Medicine, Davis, CA, USA BACKGROUND: Previous research shows patient socioeconomic status […]

Pharmaceutical use among older adults: using administrative data to examine medication-related issues

Can J Aging 24 Suppl 1:81-95. Manitoba Centre for Health Policy, Department of Community Health Sciences, University of Manitoba, Winnipeg, MB, Canada Medication use is […]

The effects of complications and comorbidities on the quality of preventive diabetes care: a literature review

Popul Health Manag 11:217-218. Mathematica Policy Research, Washington, DC, USA Although concurrent conditions such as complications and comorbidities are common in people with diabetes, both […]

Cost of arterial hypertension according to levels of morbidity in primary care setting

Med Clin (Barc) 133:290-295. Published in Spanish. Dirección de Planificación, Badalona Serveis Assistencials SA, Badalona, Barcelona, España BACKGROUND AND OBJECTIVE: To determine the health care […]

Case study: the Minneapolis Buyers Health Care Action Group

Inquiry 35:171-177. Health Research Center, Institute for Research and Education, Health System Minnesota, Minneapolis, MN, USA Managed care plans are a type of health insurance. They […]

Physician and patient factors associated with follow up of high grade dysplasias of the cervix: a population-based study

Gynecol Oncol 120:63-67. Department of Obstetrics and Gynecology, Division of Gynecologic Oncology, University of Toronto, Toronto, ON, Canada OBJECTIVE: This population-based study characterizes available physician […]

Comparative ability of comorbidity classification methods for administrative data to predict outcomes in patients with chronic obstructive pulmonary disease

Ann Epidemiol 22:881-887. Institute for Clinical Evaluative Sciences, Toronto, ON, Canada PURPOSE: Administrative healthcare databases are used for health services research, comparative effectiveness studies, and […]

Review of methods used to measure comorbidity in cancer populations: no gold standard exists

J Clin Epidemiol 65:924-933. Cancer Control and Screening Research Group, Department of Public Health, University of Otago, Wellington South, New Zealand OBJECTIVE: This article reviews […]

Evaluating early repeat emergency department use in patients with atrial fibrillation: a population-based analysis

Am Heart J 165:939-948. Institute for Clinical Evaluative Sciences, Toronto, ON, Canada BACKGROUND: Emergency department (ED) use by patients with atrial fibrillation is high and […]

Primary care utilization and mental health diagnoses among adult patients requiring interpreters: a retrospective cohort study

J Gen Intern Med 28:386-391. Office of Women’s Health, Mayo Clinic, Rochester, MN, USA BACKGROUND: Patients requiring interpreters may utilize the health care system differently […]

Association between metformin therapy and mortality after breast cancer: a population-based study

Diabetes Care 36:3018-3026. Women’s College Research Institute, Women’s College Hospital, Toronto, ON, Canada OBJECTIVE: Metformin has been associated with a reduction in breast cancer risk […]

Primary care doctors’ opinion on a risk adjustment system: Adjusted Clinical Groups

Rev Peru Med Exp Salud Publica 30:345-347. Published in Spanish. Directorate of Planning, Badalona Serveis Assistencials SA, Badalona, Spain No abstract

Impact of rheumatoid arthritis on receiving a diagnosis of hypertension among patients with regular primary care

Arthritis Care Res Department of Medicine, Rheumatology Division, University of Wisconsin, Madison, WI, USA OBJECTIVE: Despite numerous studies reporting increased cardiovascular disease (CVD) in patients […]

Comorbidity of dementia: a cross-sectional study of primary care older patients

BMC Psychiatry 14:84. EpiChron Research Group on Chronic Diseases, Aragón Health Sciences Institute (IACS), University Hospital, Zaragoza, Spain BACKGROUND: The epidemiologic study of comorbidities of […]

The impact of morbidity trajectories on identifying high-cost cases: using Taiwan’s National Health Insurance as an example

J Public Health 36:300-307. Department of Health Policy & Management, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA. BACKGROUND: Incorporating longitudinal information […]

Exploring the Johns Hopkins Aggregated Diagnosis Groups in administrative data as a measure of child health

This study explored the utility of the Johns Hopkins Aggregated Diagnostic Groups (ADGs) as a noncategorical measure of child health in administrative health data. Canadian […]

The hassle of wellness: do peers and health status matter?

In: Population Association of America, eds. 2014 Annual Meeting, Population Association of America. Princeton, NJ, USA: Population Association of America. Cornell University, Ithaca, NY, USA […]

A data-driven approach towards patient identification for telehealth programs

2015 IEEE International Conference on Big Data :2551-2559. Robert Bosch (US), Palo Alto, CA, USA Telehealth provides an opportunity to reduce healthcare costs through remote […]

An actuarial perspective on healthcare expenditure in the last year of life

Washington, DC: International Congress of Actuaries. University of Cape Town, South Africa The aim of this paper is to highlight the key methodological considerations in […]

A hierarchical multivariate two-part model for profiling providers’ effects on health care changes

J Am Statistical Assoc 101:911-923. Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA Procedures for analyzing and comparing health care providers’ effects on […]

Risk adjustment in state Medicaid programs

Health Watch :14-17, 32-34. Denver, Colorado, office of Wakely Consulting Group This article discusses some of the most important considerations in implementing risk adjustment within […]

Health-based risk adjustment: application to premium development and profiling

In: Wrightson CW, eds. Financial strategy for managed care organizations: rate setting, risk adjustment, and competitive advantage. Ann Arbor, MI, USA: Health Administration Press:165-225. Health […]

Evaluation of casemix adjustment methods for the Massachusetts Division of Medical Assistance

Massachusetts Rate Setting Commission. Final report and recommendation. Boston, MA, USA: Massachusetts Rate Setting Commission. Massachusetts Rate Setting Commission, Boston, MA, USA We investigated methods […]

How well do models work? Predicting health care costs

In: American Statistical Association, eds. Proceedings of the Section on Statistics in Epidemiology. Alexandria, VA, USA: American Statistical Association:42-49. Department of General Internal Medicine, Boston […]

A risk stratification model for adult patients with obstructive sleep apnea: development and evaluation

Toronto, ON, Canada: Institute for Clinical Evaluative Sciences. Institute for Clinical Evaluative Sciences, Toronto, ON, Canada STUDY HYPOTHESES: We hypothesize that the apnea-hypopneas index (AHI), […]

Studying effects of primary care physicians and patients on the trade-off between charges for primary care and specialty care using a hierarchical multivariate two-part model

Department of Biostatistics Working Paper 51. Baltimore, MD, USA: Johns Hopkins University. Johns Hopkins University, Baltimore, MD, USA OBJECTIVE. To examine effects of primary care […]

An incentive mechanism for using risk adjuster to reimburse health care provider

York, UK: University of York. University of York, York, UK Health care providers are almost always universally reimbursed by third party purchasers. As a result, […]

Prompt reduction in use of medications for comorbid conditions after bariatric surgery

Rockville, MD, USA: Agency for Healthcare Research and Quality. Johns Hopkins University, Baltimore, MD, USA BACKGROUND. Bariatric surgery leads to weight loss, but it is […]

The dynamic effects of medical risk costs: evidence from quantile regression

Journal of Statistics and Management Systems 14:843-868. This paper adopted the quantile regression (QR) estimator to assess the effects of the medical utilization factors (changes […]

An economic analysis of secure messaging between patients and providers

Seattle, WA, USA: University of Washington (doctoral dissertation). University of Washington, Seattle, WA, USA This dissertation presents an economic analysis of patient-provider communication through secure […]

Comorbilidad y discapacidad en pacientes con insuficiencia cardiaca

Madrid, Spain: Universidad Autonoma de Madrid (doctoral dissertation). Published in Spanish. Universidad Autonoma de Madrid, Madrid, Spain INTRODUCCIÓN: La insuficiencia cardiaca (IC) es un problema […]

Thiazolidinedione use and risk of hospitalization for pneumonia in type 2 diabetes:  population based matched case-control study

F1000Research 2:145. Department of Medicine, Johns Hopkins University Schools of Medicine and Public Health, Baltimore, MD, USA OBJECTIVE: Previous randomized clinical trials and their meta-analyses […]

Case Mix Adjustment Case Study – Payer

This Case Study shows how Leicester City CCG, one of the most ethnically diverse areas of the UK, analyzed emergency admission rates for all practices, to learn that practices with lower emergency admission rates had significantly higher coding completeness and GP patient survey scores. Learn more.

Facilitating Equity and Efficiency in Primary Health Care

Johns Hopkins University Facilitating Equity & Efficiency in Primary Health Care, Malaysia using the ACG Case Mix System Dr Karen Kinder Executive Director

Tuesday-Re-thinking ACG fundamentals-Kitching and Heim

HealthPartners Risk Adjustment in Total Cost of Care & Resource Use: Re-Thinking Risk Adjustment Chad Heim Gary Kitching

Monday-US Health Reform-Ewald

Minnesota Department of Human Services The MN Health Care Home Initiative and ACG Dean Ewald

Monday-Care Coordination II-Haas

Mayo Clinic Assessment of Risk Stratification Methods Identifying Patients for Care Coordination within a Medical Home Lindsey R. Haas, MPH

Pilot study using Risk Stratification in Thames

Richmond Clinical Commissioning Group Using ACG to Support Delivery of Integrated Care Anna Raleigh, Consultant in Public Health Dr Caoimhe O Sullivan, Public Health Principal […]

Health Insurance Marketplace

DST Health Solutions Health Insurance Marketplace Amy Salls

Monday(C4)-Identifying Near Term Heath Cost Risk in the Absence of Claims Data—Bernard Khomenko

Identifying Near Term Heath Cost Risk  in the Absence of Claims Data   —Bernard Khomenko, CEBS Vice President of Client Solutions, Data Smart Solutions 

Tuesday(C8)-Using the ACG Software for a Full Picture of Population Risk Under the Accountable Care Act (ACA)-Salls and Bodycombe

Using the ACG Software for a Full Picture of Population Risk Under the Accountable Care Act (ACA) —Amy Salls, DST Health Solutions  David Bodycombe, Johns […]

The Future of the ACG System

Hadi Kharrazi, MD, PhD, Assistant Professor Health Policy and Management, Johns Hopkins Bloomberg School of Public Health talks about EMRs, other future data sources and […]

Predictors of hospital stay and home care services use: A population-based, retrospective cohort study in stage IV gastric cancer

Background: Home care services use has been proposed as a means of reducing costs in palliative care by decreasing hospital stay without impacting quality of […]

Albuminuria, Reduced Kidney Function, and the Risk of ST‐ and non–ST‐segment–elevation myocardial infarction

Abstract Background Chronic kidney disease is a recognized independent risk factor for cardiovascular disease, but whether the risks of ST‐segment–elevation myocardial infarction (STEMI) and non–ST‐segment–elevation […]

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 […]

Variation in the health outcomes associated with frailty among home care clients: relevance of caregiver distress and client sex

Abstract Background The identification of contextual factors that modify associations between client frailty and their health and service use outcomes is essential for informed home […]

The Incremental Health Care Costs of Frailty Among Home Care Recipients With and Without Dementia in Ontario, Canada: A Cohort Study

Abstract Objective In this study, we investigated the incremental 1-year direct costs of health care associated with frailty among home care recipients in Ontario with and without […]

Do Incentive Payments Reward The Wrong Providers? A Study Of Primary Care Reform In Ontario, Canada

ABSTRACT Primary care payment reform in the US and elsewhere usually involves capitation, often combined with bonuses and incentives. In capitation systems, providing care within […]

Economic Analysis of Adjuvant Chemoradiotherapy Compared with Chemotherapy in Resected Pancreas Cancer

Abstract Background Population-based survival and costs of pancreas adenocarcinoma patients receiving adjuvant chemoradiation and chemotherapy following pancreaticoduodenectomy are poorly understood. Methods This retrospective cohort study used […]

Incremental healthcare utilisation and costs among new senior high-cost users in Ontario, Canada: a retrospective matched cohort study

Abstract Objectives To describe healthcare use and spending before and on becoming a new (incident) senior high-cost user (HCU) compared with senior non-HCUs; to estimate […]

Diagnostic accuracy of administrative codes for autosomal dominant polycystic kidney disease in clinic patients with cystic kidney disease

Abstract Background The ability to identify patients with autosomal dominant polycystic kidney disease (ADPKD) and distinguish them from patients with similar conditions in healthcare administrative […]

Correlates of non-adherence to breast, cervical, and colorectal cancer screening among screen-eligible women: a population-based cohort study in Ontario, Canada

Abstract Purpose Breast, cervical, and colorectal cancers are cancers that can be detected early through screening. Despite organized cancer screening programs in Ontario, Canada participation […]

Comparing the Predictive Effects of Patient Medication Adherence Indices in Electronic Health Record and Claims-Based Risk Stratification Models

Abstract Multiple indices are available to measure medication adherence behaviors. Medication adherence measures, however, have rarely been extracted from electronic health records (EHRs) for population-level […]

In-Person and Telehealth Ambulatory Contacts and Costs in a Large US Insured Cohort Before and During the COVID-19 Pandemic

Abstract Importance This study assesses the role of telehealth in the delivery of care at the start of the COVID-19 pandemic. Objectives To document patterns […]

Class III Obesity and Other Factors Associated with Longer Wait Times for Endometrial Cancer Surgery: A Population-Based Study

Abstract Objective To evaluate the impact of class III obesity (body mass index >40 kg/m2) on wait times for endometrial cancer surgery in Ontario, as […]

Evaluating the performance of a predictive modeling approach to identifying members at high-risk of hospitalization

Abstract Aims To evaluate the risk-of-hospitalization (ROH) models developed at Blue Cross Blue Shield of Louisiana (BCBSLA) and compare this approach to the DxCG risk-score […]

Impact of Area Deprivation Index on the Performance of Claims-Based Risk-Adjustment Models in Predicting Health Care Costs and Utilization

Abstract Objective Traditionally, risk-adjustment models do not address the characteristics of minority populations, such as race or socioeconomic status. This study aimed to evaluate the […]

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