Theodore Stefos

Learn More
OBJECTIVE The objective was to evaluate the beta-globin gene mutations and polymorphisms in cell-free fetal DNA in the early first trimester (7-9th weeks' gestation) for the prediction of thalassemia risk at chorionic villous sampling (CVS). STUDY DESIGN Beta-globin gene mutations and polymorphisms were analyzed in 97 carrier families and 100 control(More)
To determine the accuracy of hysteroscopy in diagnosing endometrial cancer, hyperplasia, polyps and submucous myomas. Relevant articles were retrieved from the MEDLINE and the Cochrane Library (1986–2011). Studies were selected blindly. Results for diagnostic accuracy were extracted to form separate 2 × 2 tables (for endometrial cancer, hyperplasia, polyps(More)
An inadequate supply of primary care providers is leading to a crisis in access. Pressures are being placed on primary care practices to increase panel sizes. The impact of these pressures on clinical processes, patient satisfaction and waiting times is largely unknown, although evidence from recent literature shows that longer waiting time results in(More)
Problems of fairness in prospective payment have existed since the inception of this regulatory method in the early 1980s. While prospective payment ostensibly has sought to reward efficient producers and provide disincentives for inefficient producers of health care, many hospitals have been penalized financially as a consequence of facing systematic(More)
This article estimates excess costs associated with postoperative complications among inpatients treated in Veterans Health Administration (VA) hospitals. The authors conducted an observational study on 43,822 hospitalizations involving inpatient surgery in one of 104 VA hospitals during fiscal year 2007. Hospitalization-level cost regression analyses were(More)
This paper estimates the excess cost of hospital inpatient care due to adverse safety events in the U.S. Department of Veterans Affairs (VA) hospitals during fiscal year 2007. We measured adverse events according to the Patient Safety Indicator (PSI) algorithms of the Agency for Healthcare Research and Quality. Patient level cost regression analyses were(More)
OBJECTIVE To compare risk scores computed by DxCG (Verisk) and Centers for Medicare and Medicaid Services (CMS) V21. RESEARCH DESIGN Analysis of administrative data from the Department of Veterans Affairs (VA) for fiscal years 2010 and 2011. STUDY DESIGN We regressed total annual VA costs on predicted risk scores. Model fit was judged by R-squared, root(More)
This paper is an examination of hospital 30-day readmission costs using data from 119 acute care hospitals operated by the U.S. Veterans Administration (VA) in fiscal year 2011. We applied a two-part model that linked readmission probability to readmission cost to obtain patient level estimates of expected readmission cost for VA patients overall, and for(More)
This paper explores the relationship between the cost and quality of hospital care from the perspective of applied microeconomics. It addresses both theoretical and practical complexities entailed in incorporating hospital quality into the estimation of hospital cost functions. That literature is extended with an empirical analysis that examines the use of(More)
The U.S. Department of Veterans Affairs operates a hospital system that distributes a national global budget to 159 hospital units. Over recent years, cost containment and downward budgetary pressures have affected hospital performance and the quality of care delivered in unknown ways. This article examines hospital staffing levels as potential performance(More)