Zeynal Karaca

ORCID: 0000-0001-7744-4476
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About
Contact & Profiles
Research Areas
  • Healthcare Policy and Management
  • Global Health Care Issues
  • Primary Care and Health Outcomes
  • Emergency and Acute Care Studies
  • Homelessness and Social Issues
  • Health Systems, Economic Evaluations, Quality of Life
  • Patient Satisfaction in Healthcare
  • Pharmaceutical Economics and Policy
  • Healthcare Systems and Reforms
  • Pharmaceutical industry and healthcare
  • Antibiotic Use and Resistance
  • Healthcare cost, quality, practices
  • Healthcare Systems and Technology
  • Global Health Workforce Issues
  • Food Security and Health in Diverse Populations
  • Sepsis Diagnosis and Treatment
  • Bacterial Identification and Susceptibility Testing
  • Employment and Welfare Studies
  • Pneumonia and Respiratory Infections
  • Urban, Neighborhood, and Segregation Studies
  • Neonatal Respiratory Health Research
  • Clinical practice guidelines implementation
  • Heart Failure Treatment and Management
  • Maternal and Perinatal Health Interventions
  • Digital Imaging in Medicine

Agency for Healthcare Research and Quality
2013-2022

Health and Human Services Agency
2018-2019

United States Department of Health and Human Services
2002-2019

National Bureau of Economic Research
2019

Northwestern University
2019

George Washington University
2012-2013

Social and Scientific Systems (United States)
2012-2013

Background: Trend analyses of opioid-related inpatient stays depend on the availability comparable data over time. In October 2015, US transitioned diagnosis coding from International Classification Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) to ICD-10-CM, increasing ∼14,000 68,000 codes. This study examines how trend involving opioid diagnoses were affected by transition ICD-10-CM. Subjects: Data are Healthcare Cost and Utilization Project State Inpatient Databases for 14...

10.1097/mlr.0000000000000805 article EN Medical Care 2017-09-19

The difference between private and public (Medicare Medicaid) payment rates for inpatient hospital stays widened 1996 2012. Medical Expenditure Panel Survey data reveal that standardized insurer in 2012 were approximately 75 percent greater than Medicare's—a sharp increase from the differential of 10 period 1996–2001.

10.1377/hlthaff.2015.0706 article EN Health Affairs 2015-12-01

Health information exchanges (HIEs) are expected to improve poor coordination in emergency departments (EDs); however, whether and when HIEs associated with better operational outcomes remains poorly understood. In this work, we study HIE length of stay (LOS) relationship using a large dataset from the Healthcare Cost Utilization Project consisting about 7.4 million treat‐and‐release visits made 63 EDs Massachusetts. Overall, find that adoption is 10.2% reduction LOS percentage increases...

10.1111/poms.12953 article EN Production and Operations Management 2018-09-22

Length of stay is an important indicator quality care in Emergency Departments (ED). This study explores the duration patients' visits to ED for which they are treated and released (T&R).Retrospective data analysis multivariate regression were conducted investigate T&R visits. Duration each visit was computed by taking difference between admission discharge times. The Healthcare Cost Utilization Project (HCUP) State Department Databases (SEDD) 2008 used analysis.The mean 195.7 minutes....

10.1186/1471-227x-12-15 article EN cc-by BMC Emergency Medicine 2012-11-06

Objective To estimate the effects of 2014 Medicaid expansions on inpatient outcomes. Data Sources Health Care Cost and Utilization Project State Inpatient Databases, 2011–2014; population unemployment estimates. Study Design Retrospective study estimating using difference‐in‐differences regression. Outcomes included total admissions, referral‐sensitive surgical preventable length stay, cost, patient illness severity. Findings In quarter four, compared with nonexpansion states, admissions...

10.1111/1475-6773.12734 article EN Health Services Research 2017-06-30

The Affordable Care Act (ACA) has increased rates of public and private health insurance in the United States. Increasing coverage could raise hospital revenue reduce need to shift costs insured patients. consequences ACA on revenues be examined if payments were known for most hospitals Actual payment data are considered confidential, however, only charges widely available. Payment-to-charge ratios (PCRs), which convert an estimated payment, have been 10 states. Here we evaluated whether...

10.1186/s12913-015-1040-8 article EN cc-by BMC Health Services Research 2015-06-01

Objective To assess the impact of hospital affiliation, centralization, and managed care plan ownership on inpatient cost quality. Data Sources Inpatient discharges from 3,957 community hospitals in 44 states American Hospital Association Annual Survey data 2010 to 2012. Study Design We conducted a retrospective longitudinal regression analysis using hierarchical modeling clustered within hospitals. Collection Detailed discharge including costs, length stay, patient characteristics...

10.1111/1475-6773.12631 article EN Health Services Research 2016-12-22

There is uncertainty about the burden of hospitalization associated with respiratory syncytial virus (RSV) and influenza in children, including those underlying medical conditions.

10.1097/ede.0000000000001092 article EN Epidemiology 2019-08-30

This study examines the association between quality of hospital discharge planning and all-cause 30-day readmissions same-hospital readmissions. The sample included adults aged 18 years older hospitalized in 16 states 2010 or 2011 for acute myocardial infarction, heart failure, pneumonia, total hip joint arthroplasty. Data from Hospital Consumer Assessment Healthcare Providers Systems measured discharge-planning at level. A generalized linear mixed model was used to estimate contribution...

10.1177/1077558716647652 article EN Medical Care Research and Review 2016-05-04

Medicare Advantage plans have incentives and tools to optimize patient care. Therefore, hospitalizations may lower cost higher quality than similar traditional hospitalizations. We applied a coarsened matching approach 2013 Healthcare Cost Utilization Project hospital discharge data from 22 states compare cost, length of stay, readmissions for Traditional Advantage. found that were substantially less expensive shorter mental health stays but costlier longer injury surgical stays. little...

10.1177/1077558717692103 article EN Medical Care Research and Review 2017-03-08

The sources of racial disparity in duration patients' visits to emergency departments (EDs) have not been documented well enough for policymakers distinguish patient-related factors from hospital- or area-related factors. This study explores the routine EDs at teaching and non-teaching hospitals.We performed retrospective data analyses multivariate regression investigate ED hospitals. Healthcare Cost Utilization Project (HCUP) State Emergency Department Databases (SEDD) were used analyses....

10.5811/westjem.2013.3.12671 article EN cc-by Western Journal of Emergency Medicine 2013-09-17

Some states have adopted Accountable Care Organization (ACO) models to transform their Medicaid programs, but little is known about impact on health care outcomes and costs. ACOs are uniquely positioned improve childbirth because of the number births covered by Medicaid. Using Healthcare Cost Utilization Project hospital data, we examined relationship between ACO adoption (a) neonatal maternal outcomes, (b) cost per birth. We compared in that programs with adjacent without models....

10.1177/1077558718823132 article EN Medical Care Research and Review 2019-01-07

Several reports have linked the 2007–2009 Great Recession in United States with a slowdown health care spending and decreased utilization. However, little is known regarding how recent economic downturn affected hospital costs per inpatient stay for different segments of population. The purpose this study was to examine association between changes unemployment rate cost discharge Medicare commercial discharges. We used retrospective data at Core Based Statistical Area (CBSA)-level from 46...

10.1186/1472-6963-14-378 article EN cc-by BMC Health Services Research 2014-10-13

The Centers for Medicare & Medicaid Services Hospital Readmission Reduction Program and the Innovations Bundled Payments Care Improvement Initiative hold hospitals accountable readmissions that occur at other hospitals. A few studies have described extent to which hospital original place of treatment (i.e., same-hospital readmissions). This study uses data from 16 states describe variation in by patient characteristics across multiple conditions. We found majority 30-day same hospital,...

10.1177/1077558715577478 article EN Medical Care Research and Review 2015-03-30

ABSTRACT Objective: Emergency departments (EDs) are critical sources of care after natural disasters such as hurricanes. Understanding the impact on ED utilization by subpopulation and proximity to hurricane’s path can inform emergency preparedness planning. This study examines changes in for residents 344 counties occurrence 7 US hurricanes between 2005 2016. Methods: retrospective observational used data from Healthcare Cost Utilization Project State Inpatient Databases Department...

10.1017/dmp.2020.281 article EN Disaster Medicine and Public Health Preparedness 2020-10-07

Abstract Background Rates of sepsis/septicemia hospitalization in the US have risen significantly during recent years, and antibiotic resistance use may contribute to those rates through various mechanisms. Methods We used multivariable linear regression relate state-specific outpatient prescribing overall for fluoroquinolones, penicillins, macrolides, cephalosporins between 2011-2012 with septicemia (ICD-9 codes 038.xx present anywhere on discharge diagnosis) each following age groups...

10.1101/404046 preprint EN cc-by-nc-nd bioRxiv (Cold Spring Harbor Laboratory) 2018-08-29

Abstract Objectives Rates of hospitalization with sepsis/septicemia and associated mortality in the US have risen significantly during last two decades. Antibiotic resistance may contribute to rates sepsis-related outcomes through lack clearance bacterial infections following antibiotic treatment different stages infection. However, there is limited information about relation between prevalence various antibiotics bacteria outcomes. Methods For age groups adults...

10.1101/404137 preprint EN cc-by-nc-nd bioRxiv (Cold Spring Harbor Laboratory) 2018-08-29
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