Effects of cost sharing on physician utilization under favourable conditions for supplier-induced demand

The effects of cost sharing on the demand for ambulatory care in experimental circumstances are well understood since the Rand Health Insurance Experiment (HIE). However, in a non-experimental real-world context, supplier-induced demand of doctors might erode some of the significant negative out-of-pocket price elasticity identified in the HIE. Belgium is an interesting test case for this hypothesis because it has relatively high rates of patient cost sharing in its public health insurance system and a very high density of physicians, all remunerated fee-for-service. We have exploited the price variation generated by a substantial increase in patient co-payment rates in 1994 to estimate out-of-pocket price elasticities for three groups of users, and for three types of services using a fixed-effects model in levels and in differences. We obtain significant out-of-pocket price elasticities for the general population in the range from -0.39 to -0.28 for GP home visits, -0.16 to -0.12 for GP office visits and -0.10 for specialist visits. The estimates were generally lower and less significant for the groups of elderly and disabled. The differences we find in price responsiveness appear to be fairly robust and consistent with the HIE predictions. These results suggest that--at least in the short run--non-experimental utilization effects of cost sharing are very similar to the experimental evidence, even in a situation of favourable conditions for supplier-induced demand.     

The impact of patient cost-sharing on low-income populations: Evidence from Massachusetts

Greater patient cost-sharing could help reduce the fiscal pressures associated with insurance expansion by reducing the scope for moral hazard. But it is possible that low-income recipients are unable to cut back on utilization wisely and that, as a result, higher cost-sharing will lead to worse health and higher downstream costs through increased use of inpatient and outpatient care. We use exogenous variation in the copayments faced by low-income enrollees in the Massachusetts Commonwealth Care program to study these effects. We estimate separate price elasticities of demand by type of service. Overall, we find price elasticities of about −0.16 for this low-income population — similar to elasticities calculated for higher-income populations in other settings. These elasticities are somewhat smaller for the chronically sick, especially for those with asthma, diabetes, and high cholesterol. These lower elasticities are attributable to lower responsiveness to prices across all categories of service, and to some statistically insignificant increases in inpatient care.     

Physician response to the United Mine Workers'' cost-sharing program: the other side of the coin.

The effect of cost sharing on health services utilization is analyzed from a new perspective, that is, its effects on physician response to cost sharing. A primary data set was constructed using medical records and billing files from a large multispecialty group practice during the three-year period surrounding the introduction of cost sharing to the United Mine Workers Health and Retirement Fund. This same group practice also served an equally large number of patients covered by United Steelworkers'' health benefit plans, for which similar utilization data were available. The questions addressed in this interinsurer study are: (1) to what extent does a physician''s treatment of medically similar cases vary, following a drop in patient visits as a result of cost sharing? and (2) what is the impact, if any, on costs of care for other patients in the practice (e.g., "spillover effects" such as cost shifting)? Answers to these kinds of questions are necessary to predict the effects of cost sharing on overall health care costs. A fixed-effects model of physician service use was applied to data on episodes of treatment for all patients in a private group practice. This shows that the introduction of cost sharing to some patients in a practice does, in fact, increase the treatment costs to other patients in the same practice who remain under stable insurance plans. The analysis demonstrates that when the economic effects of cost sharing on physician service use are analyzed for all patients within a physician practice, the findings are remarkably different from those of an analysis limited to those patients directly affected by cost sharing.     

Price elasticity of expenditure across health care services

Policymakers in countries around the world are faced with rising health care costs and are debating ways to reform health care to reduce expenditures. Estimates of price elasticity of expenditure are a key component for predicting expenditures under alternative policies. Using unique individual-level data compiled from administrative records from the Chilean private health insurance market, I estimate the price elasticity of expenditures across a variety of health care services. I find elasticities that range between zero for the most acute service (appendectomy) and -2.08 for the most elective (psychologist visit). Moreover, the results show that at least one third of the elasticity is explained by the number of visits; the rest is explained by the intensity of each visit. Finally, I find that high-income individuals are five times more price sensitive than low-income individuals and that older individuals are less price-sensitive than young individuals.     

医疗保健服务利用行为模式

医疗保健服务利用行为模式是近20年来国际卫生服务研究领域中比较具有影响力的卫生服务研究模式。该模式主要运用于研究分析影响居民医疗保健服务利用与医疗费用等的相关因素。目前该模式已经广泛运用于影响居民医疗保健服务利用与医疗费用等各特殊人群的卫生服务研究。本文系统介绍了这一模式的完善过程，这对促进我国卫生服务研究的发展具有一定的现实意义。     

The Impacts of China's Urban Employee Basic Medical Insurance on Healthcare Expenditures and Health Outcomes

At the end of 1998, China launched a government‐run mandatory insurance program, the urban employee basic medical insurance (UEBMI), to replace the previous medical insurance system. Using the UEBMI reform in China as a natural experiment, this study identifies variations in patient cost sharing that were imposed by the UEBMI reform and examines their effects on the demand for healthcare services. Using data from the 1991–2006 waves of the China Health and Nutrition Survey, we find that increased cost sharing is associated with decreased outpatient medical care utilization and expenditures but not with decreased inpatient care utilization and expenditures. Patients from low‐income and middle‐income households or with less severe medical conditions are more sensitive to prices. We observe little impact on patient's health, as measured by self‐reported health status. Copyright © 2015 John Wiley & Sons, Ltd.     

Health status and heterogeneity of cost‐sharing responsiveness: how do sick people respond to cost‐sharing?

This paper examines whether the responsiveness of health care utilization to cost-sharing varies by health status and the implications of such heterogeneity. First, we show theoretically that if health care utilization of those in poor health is less responsive to cost sharing, this, combined with the skewness of health expenditures in health status, leads to overestimates of the effect of cost sharing. This bias is exacerbated when elasticities are generalized to populations with greater expenditure skewness. Second, we show empirically that cost-sharing responsiveness does differ by health status using data from the Medicare Current Beneficiary Survey. Medicare beneficiaries are stratified into health status groups based on activity of daily living (ADL) impairments and self-reported health status. Separately, for each of the health status groups, we estimate the effect of Medigap insurance on Part B utilization using a two-part expenditure model. We find that the change in expenditures associated with Medigap is smaller for those in poorer health. For example, when stratified using ADLs, Medigap insurance increases expenditures for 'healthy' groups by 36.4%, while the increase for the 'sick' group is 12.7%. Results are qualitatively the same for different forms of supplemental insurance and different methods of health status stratification. We develop a test to demonstrate that adjusting our results for selection bias would result in estimates of greater heterogeneity. Our results imply that a lowerbound estimate of the bias from neglecting heterogeneity is about 2-7%.     

Mental illness, functional impairment, and patient preferences for collaborative care in an uninsured, primary care population

OBJECTIVE: Our goal was to compare the prevalence of mental illness and its impact on functional status in an indigent uninsured primary care population with a general primary care sample. We also hoped to assess patient preferences about mental health and medical service integration. STUDY DESIGN: We compared a survey of consecutive primary care adults in April and May 1999 with a 1997-98 survey of 3000 general population primary care patients. Both studies used the Primary Care Evaluation of Mental Disorders Patient Health Questionnaire and the 20-question Medical Outcomes Study Short Form. POPULATION: The patients were from a private nonprofit primary care clinic in Grand Junction, Colorado, that served only low-income uninsured people. We approached a total of 589 consecutive patients and enrolled 500 of them. MAIN OUTCOME MEASURE: The main outcomes were the prevalence of psychiatric illnesses and the relationship with functional impairment. We compared our findings with a more generalizable primary care population. RESULTS: This low-income uninsured population had a higher prevalence of 1 or more psychiatric disorders (51% vs 28%): mood disorders (33% vs 16%), anxiety disorders (36% vs 11%), probable alcohol abuse (17% vs 7%), and eating disorders (10% vs 7%). Having psychiatric disorders was associated with lower functional status and more disability days compared with not having mental illness. Patients indicated a preference for mental health providers and medical providers to communicate about their care. CONCLUSIONS: This low-income uninsured primary care population has an extremely high prevalence of mental disorders with impaired function. It may be important in low-income primary care settings to include collaborative care designs to effectively treat common mental disorders, improve functional status, and enhance patient self-care.     

The impact of change from copayment to coinsurance on medical care usage and expenditure in outpatient setting in older Koreans

Patient cost‐sharing change was implemented on August 1, 2007, for outpatient care in the clinic setting in Korea from copayment to coinsurance. This study aims to estimate the effect of the policy change on medical care usage and expenditure in older Koreans. By using national health insurance claims data from the Health Insurance Reimbursement Assessment Service, this study analyzed the entire 137 million claims for a total of approximately 4.1 million patients aged 60 to 69 years who had been diagnosed and/or treated for outpatient care in clinics from January 1, 2007, to December 31, 2008. Medical care usage was defined as the proportion of all beneficiaries in each group who visited clinics and the mean number of visit days per beneficiary. Medical care expenditure per visit day was expressed as total costs, reimbursed amount, and patient's out‐of‐pocket payment. Data on January through June of 2008 were analyzed as compared with the same months of 2007. Raw difference‐in‐difference and multiple regression analyses were performed. The interaction coefficients, which measured the impact of cost‐sharing change, was ?0.078 in model 1 and ?0.039 in model 2 (P < .0001). In conclusion, a cost‐sharing change from copayment to coinsurance reduced medical care usage and expenditure.     

The price of progress: prescription drugs in the health care market

Pharmacy costs are rising in excess of general and medical cost inflation, leading to calls for price and utilization controls by public and private payers. Such controls would be ineffective and counterproductive because they would attempt to reverse two profound, historic phenomena at work in the U. S. health care system. The added costs associated with breakthrough medicines represent a major structural shift from the provision of traditional medical services to the consumption of medical products; they also represent the creation of economic, social, and public health utility that we value as a society. The balkanization of medical delivery, institutionalized under traditional reimbursement strategies and galvanized by federal law, does not adequately account for or efficiently accommodate this rotation and increased utility. Federal and state laws regulating health insurance and provider risk sharing need to be revamped to encourage rather than constrain the social progress embodied in expensive, breakthrough medical technologies.     

A study of the morbidity pattern of referred patients and the effectiveness of the referral system in primary health care centers.

Patient referral system is considered to be an important element in achieving the objectives of the Primary Health Care services. Patients attending the Primary Health Care Center (PHCC) expect basic medical care and appropriate follow-up services. Thus, patients requiring further evaluation and treatment are referred to a secondary health care facility. In this study the morbidity pattern as well as the referral system was evaluated in selected PHCC in the city of Jeddah. A systematic random sample of all the patient referrals from selected PHCC's were analyzed. A total of 1,164 referrals were studied, 59.9 per cent were females and 40.1 per cent were males. The contents of referral letters from PHCC to hospitals as well as feed back from hospitals were analyzed. The majority of referrals were for the age group 25-44 years old 458 (39.3%). The results demonstrated that 5 per cent of patients were routinely referred to the secondary health care centers, and the feedback from these secondary health care facilities was (22.7%). It was also noted that the majority of referral letters lack commonly accepted standards of information about the patient. It was concluded that the follow-up and feed-back system needs to be reinforced. The primary health care providers need to review the patient referral system and implement specific criteria for the optimum utilization of this essential service for the benefit of the community.     

The welfare effect of co-payment adjustments on emergency department visits in medical centers: Evidence from Taiwan

This study investigates the welfare effect of copayment adjustments on emergency department (ED) visits in medical centers under the National Health Insurance (NHI) program in Taiwan. To this end, we first applied the smooth time-varying co-integration model to estimate the time-varying price and income elasticities of ED care demand in medical centers, and then welfare effects of various copayment adjustments were simulated. Our empirical results suggested that an upward adjustment in copayment neither cause a potential pricing-out effect nor generate a significant amount of welfare gain, despite there exists a negatively long-run relationship between copayment and ED care utilization in medical centers. Nevertheless, the share of non-urgent ED visits is positively correlated with both the negative time-varying price elasticities and welfare gain. These findings serve as important evidence to validate the application of the copayment as a strategic policy instrument to moderate both non-urgent ED care utilization and welfare loss due to moral hazard behavior under Taiwan’s NHI program.     

Holes in the safety net? Assessing the effects of targeted benefits upon the health care utilization of poor New Zealanders

This paper examines the issue of targeting primary health-care benefits in favour of low-income recipients and other high users of health care. Specifically we examine the New Zealand case where, despite the introduction of such benefits in 1992, financial barriers appear to remain a significant determinant of utilization. We address this issue through a case study conducted in the city of Christchurch. Through a survey-based research design, we seek to determine the extent to which price barriers remain important by comparing patient utilization of a free community health clinic (n = 202) with a low-income control sample of patients who continue to use conventional (for New Zealand) fee-for-service providers (n = 148). We found that a large proportion of respondents delayed seeking care because of cost. Further, for respondents using the fee-for-service providers, levels of use were not related to need, whereas at the free clinic there was an inverse relationship between income and consultation rates. We conclude that if a universality of benefits is not possible, then there is a need for better targeting of primary care benefits. We believe there is a danger in such initiatives being evaluated primarily in terms of their validity as funding mechanisms, rather than in terms of their success in meeting the health-care needs of the disdavantaged.     

Analysis of big patient mobility data for identifying medical regions,spatio-temporal characteristics and care demands of patients on the move

Background

Patient mobility can be defined as a patient’s movement or utilization of a health care service located in a place or region other than the patient’s place of residence. Mobility provides freedom to patients to obtain health care from providers across regions and even countries. It is essential to monitor patient choices in order to maintain the quality standards and responsiveness of the health system, otherwise, the health system may suffer from geographic disparities in the accessibility to quality and responsive health care. In this article, we study patient mobility in a national health care system to identify medical regions, spatio-temporal and service characteristics of health care utilization, and demands for patient mobility.

Methods

We conducted a systematic analysis of province-to-province patient mobility in Turkey from December 2009 to December 2013, which was derived from 1.2 billion health service records. We first used a flow-based regionalization method to discover functional medical regions from the patient mobility network. We compare the results of data-driven regions to designated regions of the government in order to identify the areas of mismatch between planned regional service delivery and the observed utilization in the form of patient flows. Second, we used feature selection, and multivariate flow clustering to identify spatio-temporal characteristics and health care needs of patients on the move.

Results

Medical regions we derived by analyzing the patient mobility data showed strong overlap with the designated regions of the Ministry of Health. We also identified a number of regions that the regional service utilization did not match the planned service delivery. Overall, our spatio-temporal and multivariate analysis of regional and long-distance patient flows revealed strong relationship with socio-demographic and cultural structure of the society and migration patterns. Also, patient flows exhibited seasonal patterns, and yearly trends which correlate with implemented policies throughout the period. We found that policies resulted in different outcomes across the country. We also identified characteristics of long-distance flows which could help inform policy-making by assessing the needs of patients in terms of medical specialization, service level and type.

Conclusions

Our approach helped identify (1) the mismatch between regional policy and practice in health care utilization (2) spatial, temporal, health service level characteristics and medical specialties that patients seek out by traveling longer distances. Our findings can help identify the imbalance between supply and demand, changes in mobility behaviors, and inform policy-making with insights.

     

对贫困人口实施医疗救助

本文在分析了我国城乡居民收入分配中的公平性加重、医疗保障水平降低、医疗费用大幅度上涨、个人负担比例增加和卫生保健等筹资的“供方投入”模式的不合理性以及贫困人口较差的健康状况和卫生服务利用水平、贫困人口的主要健康问题、“需方投入”模式对供方的激励作用的基础上,认为对贫困人口实施医疗救助不仅符合公平原则,而且符合效率原则。医疗救助计划应该成为我国目前正在步步深入的卫生改革的重要组成部分。作者分别以我国     

The Association of Long-Term Opioid Use With Health Care and Home Care Service Use Among Aged Home Care Clients

ObjectivesTo compare health care and home care service utilization, mortality, and long-term care admissions between long-term opioid users and nonusers among aged home care clients.DesignA retrospective cohort study based on the Resident Assessment Instrument–Home Care (RAI-HC) assessments and electronic medical records.Setting and ParticipantsThe study sample included all regular home care clients aged ≥65 years (n = 2475), of whom 220 were long-term opioid users, in one city in Finland (population base 222,000 inhabitants).MethodsHealth care utilization, mortality, and long-term care admissions over a 1-year follow-up were recorded from electronic medical records, and home care service use from the RAI-HC. Negative binomial and multivariable logistic regression, adjusted for several socioeconomic and health characteristics, were used to analyze the associations between opioid use and health and home care service use.ResultsCompared with nonusers, long-term opioid users had more outpatient consultations (incidence rate ratio 1.26; 95% CI 1.08−1.48), home visits (1.23; 1.01−1.49), phone contacts (1.38; 1.13−1.68), and consultations without a patient attending a practice (1.22; 1.04−1.43) after adjustments. A greater proportion of long-term opioid users than nonusers had at least 1 hospitalization (49% vs 41%) but the number of inpatient days did not differ after adjustments. The home care nurses’ median work hours per week were 4.3 (Q₁-Q₃ 1.5−7.7) among opioid users and 2.8 (1.0−6.1) among nonusers. Mortality and long-term care admissions were not associated with opioid use.Conclusions and ImplicationsLong-term opioid use in home care clients is associated with increased health care utilization regardless of the severity of pain and other sociodemographic and health characteristics. This may indicate the inability of health care organizations to produce alternative treatment strategies for pain management when opioids do not meet patients’ needs. The exact reasons for opioid users’ greater health care utilization should be examined in future.     

关于成本分摊政策变化对参保者影响的系统综述

目的：分析成本分摊政策变化对参保者的影响,为我国医疗保障制度改革提供科学证据。方法：利用系统综述方法,检索国内外所有对医疗保险制度实施成本分摊政策的相关研究,由系统综述人员对这些研究进行筛选和数据提取,利用框架分析法对纳入研究进行整合。结果：纳入48篇文献,共付额度、共付保险率、起付线和封顶线以及综合成本分摊方法对不同类型健康保障制度下,不同参保者卫生服务、药物利用以及经济负担的影响不同。结论与建议：成本分摊政策是控制医疗费用的手段;不同医疗保险制度下成本分摊政策对参保者卫生服务利用的影响存在差异;不同类型的卫生服务对成本分摊政策敏感程度不同。我国可以利用成本分摊机制控制医疗总费用,但要考虑其对不同经济状况参保者的影响以及对不同卫生服务的价格弹性,同时关注弱势群体的卫生服务需求。     

Ethnicity, gender, and utilization of mental health services in a Medicaid population

This study examines gender and ethnic differences in mental health utilization and expenditures in a fee-for-service Medicaid eligible population in Monroe County, New York. The analyses demonstrate that Medicaid poor are not a homogeneous population in terms of mental health utilization, and that their patterns of care use are quite unlike those generally attributed to the middle class patients. For example, Medicaid eligible males are more likely to be mental health users than females, although they are less likely to use medical services. Ethnicity appears to be a strong determinant of ambulatory mental health utilization, but not of inpatient care. Whites experience significantly higher levels of psychiatric ambulatory use than do the nonwhites. Nonwhites, on the other hand experience greater utilization of alcohol ambulatory services than do the whites. The data indicate that although mental health care cost represents at least 20% of total expenditures in this population, this cost is predictable and stable from year to year. Other analyses dealing with the cost of medical care for mental health users, and with the impact of a 'gate keeper' on mental health utilization patterns, are presented. Both clinical and public policy implications are discussed.     

Barriers to HIV Care: An Exploration of the Complexities That Influence Engagement in and Utilization of Treatment

This study is an exploration of engagement in outpatient medical care, medication utilization, and barriers to treatment utilization among 24 predominantly low-income, ethnic minority adults who were admitted to an urban hospital for HIV-related illnesses. A semi-structured interview was administered during the sample's hospital stay to explore patterns of service use and identify barriers to care. The majority of the sample was connected to an outpatient provider and satisfied with the care they received; however, most missed treatment appointments and skipped medication dosages. Health and treatment-related barriers, competing demands, and co-occurring mental health symptoms and illicit substance use were identified as barriers to care. Multiple obstacles indigenous to the individual, their treatment, and the environment prevented consistent treatment use among an economically disadvantaged ethnic minority sample: Implications and future directions in engaging vulnerable populations into health care for HIV are discussed.     

美国责任保健组织的发展及启示

为提高卫生服务的质量和效率,关国在可支付保健法案框架下探索建立责任保健组织。本文综述了美国在建立责任保健组织过程中,卫生服务体系的整合形式、支付方式改革等主要做法,在保证医疗服务的连续性、实现资源和信息共享、促使供方主动参与、加强对医生管制等方面积累了经验,但发展责任保健组织也面临一些挑战,在机构规模、支付方式改革的全面推进、潜在垄断、患者归属和信息共享等方面存在一定问题。最后提出,在我国卫生服务体系整合的过程中,要使医疗服务机构成为整合主体和核心,建立相应的激励机制,平衡费用、质量和效率之间的关系,防止出现供方垄断,以及建立完善的信息系统等。