Hospital-based Outpatient Departments Research Articles

A comparative study of financial performance of freestanding ambulatory surgery centres and hospital-based outpatient departments: 1997-2004

We compared financial performance of freestanding ambulatory surgery centres (ASCs) and hospital-based outpatient departments (HOPDs). Patient-level ambulatory surgery data (1997-2004) for the state of Florida were assembled and analysed. We used a pooled, cross-sectional design. We applied multiple regression models to study pricing differences for freestanding ASCs and HOPDs. Substantial charge differences exist for patients undergoing the most common outpatient procedures, and that these differentials are in favour of freestanding ASCs over HOPDs in the majority of studied procedures. These differences in charges are large enough to presume that they may translate into similar difference in actual costs. Although previous research does not show a clear 'winner' (neither ASCs nor HOPDs) in terms of quality outcomes, healthcare policymakers, payers, and patients may be led to look more carefully at charge and cost data in their contracting processes, or choosing a certain provider of outpatient services.

How well does diagnosis-based risk-adjustment work for comparing ambulatory clinical outcomes?

This paper examines the empirical consistency of the Diagnosis Cost Groups/Hierarchical Condition Categories (DCG/HCC) risk-adjustment method for comparing 7-day mortality between hospital-based outpatient departments (HOPDs) and freestanding ambulatory surgery centers (ASCs). We used patient level data for the three most common outpatient procedures provided during the 1997-2004 period in Florida. We estimated base-line logistic regression models without any diagnosis-based risk adjustment and compared them to logistic regression models with the DCG/HCC risk-adjustment, and to conditional logit models with a matched cohort risk-adjustment approach. We also evaluated models that adjusted for primary diagnoses only, and then for all available diagnoses, to assess how the frequently absent secondary diagnoses fields in ambulatory surgical data affect risk-adjustment. We found that risk-adjustment using both diagnosis-based methods resulted in similar 7-day mortality estimates for HOPD patients in comparison with ASC patients in two out of three procedures. We conclude that the DCG/HCC risk-adjustment method is relatively consistent and stable, and recommend this risk-adjustment method for health policy research and practice with ambulatory surgery data. We also recommend using risk-adjustment with all available diagnoses.

A Comparative Study of Quality Outcomes in Freestanding Ambulatory Surgery Centers and Hospital‐Based Outpatient Departments: 1997–2004

To compare quality outcomes from surgical procedures performed at freestanding ambulatory surgery centers (ASCs) and hospital-based outpatient departments (HOPDs). Patient-level ambulatory surgery (1997-2004), hospital discharge (1997-2004), and vital statistics data (1997-2004) for the state of Florida were assembled and analyzed. We used a pooled, cross-sectional design. Logistic regressions with time fixed-effects were estimated separately for the 12 most common ambulatory surgical procedures. Our quality outcomes were risk-adjusted 7-day and 30-day mortality and 7-day and 30-day unexpected hospitalizations. Risk-adjustment for patient demographic characteristics and severity of illness were calculated using the DCG/HCC methodology adjusting for primary diagnosis only and separately for all available diagnoses. Although neither ASCs nor HOPDs performed better overall, we found some difference by procedure that varied based on the risk-adjustment approach used. There appear to be important variations in quality outcomes for certain procedures, which may be related to differences in organizational structure, processes, and strategies between ASCs and HOPDs. The study also confirms the importance of risk-adjustment for comorbidities when using administrative data, particularly for procedures that are sensitive to differences in severity.

Patterns of ambulatory care utilization in Taiwan

BackgroundWe used the insurance claims of a representative cohort to quantify the patterns of ambulatory care visits, especially the doctor-shopping phenomenon, in Taiwan.MethodsThe ambulatory visit files of the 200,000-person cohort datasets from the National Health Insurance Research Database in 2002 were analyzed. Only a visit with physician consultation would be considered. We computed the visit patterns both by visit count and by patient count.ResultsIn 2002, there were 182,474 eligible people with 2,443,003 physician consultations. During the year, 87.4% of the cohort had visited physician clinics and 57.5% had visited hospital-based outpatient or emergency departments. On average, a person had 13.4 physician consultations and consulted 3.4 specialties, 5.2 physicians, and 3.9 healthcare facilities in a year. In 2002, 17.3% of the cohort had ever visited different healthcare facilities on the same day; 23.5% had ever visited physicians of the same specialty at different healthcare facilities within 7 days and the percentage of second visits was 3.8% of all visits. Besides, 7.6% of the cohort had visited two or more specialties at the same facility on the same day, and such visits make up 2.5% of all visits.ConclusionThe people in Taiwan did visit the physicians and outpatient departments frequently. Many patients not only consulted several physicians of different specialties and at different healthcare facilities during the year, but also switched the physicians and facilities quickly. An effective referral system with efficient data exchange between facilities might be the solution.

Provision of health counseling in office-based practices and hospital outpatient clinics

Objective. To compare the rates of health counseling provided during primary care visits in two different types of ambulatory care settings. Methods. Secondary analysis of the 2000 National Ambulatory Medical Care Survey (NAMCS) and National Hospital Ambulatory Medical Care Survey (NHAMCS). Results. Of the estimated 722 million adult ambulatory care visits during 2000, 90.8% were made to office-based physician practice settings and 9.2% to hospital-based outpatient departments. Consistent with previous reports, the demographic profile of patients who seek primary care in hospital outpatient departments differs from those seen in office-based practices. Provision of health counseling for exercise [OR = 1.4; 95% confidence intervals (CI): 1–1.8], diet (OR = 1.6; 95% CI: 1.2–2.3), breast self-exam (OR = 2; 95% CI: 1.1–3.6) and stress management (OR = 1.7; 95% CI: 1–2.7) during patient visits was more likely to be reported in the office-based practices than in hospital outpatient clinics. The visit-based rates of health counseling for HIV/STD prevention, tobacco use, mental health or injury prevention were low in both settings. Conclusions. There is opportunity to improve rates of preventive counseling in primary care settings and to reduce disparities that exist. Identifying the reasons for these disparities and effective interventions will be important steps in providing equitable care in the area of preventive health counseling.

Patterns of ambulatory care use for gynecologic conditions: A national study

Objective: This study was undertaken to describe the site of ambulatory care visits for gynecologic conditions in the United States and to identify patient factors associated with the site of care for these conditions. Study Design: We conducted a national cross-sectional study using data from the 1995-1996 National Ambulatory Medical Care and National Hospital Ambulatory Medical Care Surveys. Visits to private physician offices, hospital outpatient departments, and emergency departments were selected if the principal diagnoses were consistent with 1 of 9 gynecologic categories. Multiple logistic regression was used for all diagnoses to identify factors associated with visits to emergency departments or hospital-based outpatient departments compared with factors associated with visits to private physician offices. Separate regression models were developed for individual diagnoses to test the hypothesis that the factors associated with the site of care would vary across different gynecologic conditions. Results: There were 23,194,000 visits for gynecologic conditions during the 2-year study period. Genital dysplasia, ovarian disorders, and uterine disorders were associated with greater use of hospital outpatient departments and emergency departments compared with physician offices. There was a 30% to 50% reduction in emergency room use for visits by women aged 45 years and older compared with visits by women aged 18 to 29 years. Emergency department use for several gynecologic conditions was 5 to 8 times greater for visits by women with household income <$29,000 than for visits by women with household income ≥$40,000. Conclusion: Specific gynecologic diagnoses and patient factors are associated with greater use of emergency departments or hospital outpatient departments compared with physician offices. The association of these factors with the site of care varies across different gynecologic conditions. (Am J Obstet Gynecol 2001;184:523-30.)

Financing Pediatric Education in Community Settings

Increasingly, hospital-based pediatric outpatient departments are recognized as settings that attempt to combine two critical, but not always compatible, mandates: (1) education of medical students and pediatric residents in outpatient pediatrics, and (2) service, often with inadequate resources, to a socially highrisk population with a disproportionately high prevalence of social, family, and psychological dysfunction. Coexistence of these two mandates has raised a number of concerns, because pediatric ambulatory care education and training have historically been based almost exclusively in a hospital setting. Trainees often get a false impression of the types of problems they will be dealing with in pediatric primary care and of how an efficient pediatric practice is managed. In addition, they often are supervised by full-time faculty who have little if any experience in community settings and who practice only part time or not at all. These problems have led to a widespread desire to train pediatric residents outside the hospital, in settings that more closely approximate the places in which they will practice in the future. Residency programs that address this issue also provide residents with the opportunity to be trained by seasoned practitioners whose primary professional responsibility is the outpatient care of children. To date, little has been written about the cost or the financing of such educational efforts. This article summarizes what is known about the costs. We also attempt to specify the costs that should be anticipated for the various components and steps involved in devising and implementing pediatric community-based educational programs and to describe potential sources of funding for such programs.

Systemwide provider performance in a Medicaid program. Profiling the care of patients with chronic illnesses.

This study illustrates how claims data can be applied to examine cost and clinical performance of providers in the Medicaid program. The authors conducted a cross-sectional analysis of Medicaid beneficiaries in Maryland with diabetes mellitus, hypertension, and asthma treated on an ambulatory basis by hospital-based outpatient departments, physician office-based providers, and community health centers. The study year was July 1987 to June 1988. The authors defined the cost performance (high, medium, or low) of providers in the management of each of the three chronic illnesses, both before and after casemix adjustment, using a classification system based on ambulatory diagnoses (ambulatory care groups). The authors constructed claims-based clinical performance indicators for each of the three conditions. These included the number of patients admitted to acute-care hospitals for any and specific (diabetes mellitus, hypertension, and asthma) causes, the number of patients without a follow-up visit within 30 days of being discharged from the hospital, and the number of patients with consecutive emergency room visits during the study period. The ambulatory care group casemix classification system explained 23%, 33%, and 36% of the variation in total payments for patients with hypertension, diabetes, and asthma, respectively. Without adjustment for casemix, 35% to 50% of providers would be misclassified regarding their cost performance. Forty-one (19.4%) of 211 providers who treated all three illnesses were in the same cost group for all three illnesses and 95 (43%) of 223 providers who treated two of the three illnesses were in the same cost group for both illnesses. Among office-based physicians, for all three chronic illnesses, high-cost providers had more admissions (P < 0.01) for ambulatory care-sensitive conditions than low-cost providers. Among hospital outpatient departments, only high-cost providers of asthma had more admissions (P < 0.05) for asthma than low-cost providers. There was no statistically significant (P > 0.05) difference in the clinical performance indicators between high-cost and low-cost hospital outpatient department providers of primary care for hypertensive and diabetic Medicaid beneficiaries. For the other clinical performance indicators, the results were not consistent across the three illnesses or across the different types of providers. Without adjustments for casemix, a large number of providers are misclassified regarding to cost performance. In addition, most providers are not equally efficient in managing different chronic illnesses. Provider cost performance is not associated consistently with clinical performance, although severity differences not captured by the casemix adjustment may account for these observations. These measurement methods and relationships between provider performance measures may be useful to state Medicaid programs that seek to contain costs, enhance coordination of care, and improve health.