Yuichi Imanaka

Patients' preferences for involvement in treatment decision making in Japan

BackgroundA number of previous studies have suggested that the Japanese have few opportunities to participate in medical decision-making, as a result both of entrenched physician paternalism and national characteristics of dependency and passivity. The hypothesis that Japanese patients would wish to participate in treatment decision-making if adequate information were provided, and the decision to be made was clearly identified, was tested by interview survey.MethodsThe subjects were diabetic patients at a single outpatient clinic in Kyoto. One of three case study vignettes (pneumonia, gangrene or cancer) was randomly assigned to each subject and, employing face-to-face interviews, the subjects were asked what their wishes would be as patients, for treatment information, participation in decision-making and family involvement.Results134 patients participated in the study, representing a response rate of 90%. The overall proportions of respondents who preferred active, collaborative, and passive roles were 12%, 71%, and 17%, respectively. Respondents to the cancer vignette were less likely to prefer an active role and were more likely to prefer family involvement in decision-making compared to non-cancer vignette respondents. If a physicians recommendation conflicted with their own wishes, 60% of the respondents for each vignette answered that they would choose to respect the physicians opinion, while few respondents would give the familys preference primary importance.ConclusionsOur study suggested that a majority of Japanese patients have positive attitudes towards participation in medical decision making if they are fully informed. Physicians will give greater patient satisfaction if they respond to the desire of patients for participation in decision-making.

How can we improve the quality of health care in Japan?: Learning from JCQHC Hospital Accreditation

The World Health Report 2000 placed Japan first for overall health system attainment: a surprising development considering that, aside from discussing excessive expenditure, health care professionals and the Health Ministry have paid little attention recently to the quality of health care. Japans free access policy and the universal health care system have actually fostered a very relaxed attitude toward evaluation. Concerned about the possible risks to patient safety, physicians established a volunteer association to promote quality health care issues. Then in 1995, the Japan Council for Quality Health Care (JCQHC) was founded to implement the third party accreditation of hospitals. Concurrent with the formation of the JCQHC, the sharply rising costs of malpractice litigation motivated the authorities and medical facilities to work toward protecting patient safety at different levels. Despite the WHOs positive review, critics maintain that significant inequities still exist in Japanese health care. Examples include, financial inequities between private and public hospitals, and the number and quality of hospitals and physicians between rural and urban areas. To protect patient safety and improve the quality of care, every effort must be made to eliminate inequities in the health care system. JCQHC accreditation is an important tool for furthering these efforts.

Determinants of the diffusion of computed tomography and magnetic resonance imaging

OBJECTIVES The aim of this study is to explain factors influential to the diffusion of computed tomography (CTs) and magnetic resonance imaging (MRIs). METHODS Variables were identified from a review of the literature on the diffusion of health technologies. A formal process was applied to build a conceptual model of the mechanism that drives technology diffusion. Variables for the analysis were classified as predisposing, enabling, or reinforcing factors, in keeping with a model commonly used to explain the diffusion of health behaviors. Multiple regression analysis was conducted using year 2000 OECD data. RESULTS The results of this study showed that total health expenditure per capita (p < .01, both CTs and MRIs) and flexible payment methods to hospitals (p < .05, both CTs and MRIs) were significantly associated with the diffusion of CTs and MRIs (adjusted R2 = 0.477, 0.656, respectively). CONCLUSIONS This study presents a systematically developed model of the mechanism governing technology diffusion. Important findings from the study show that purchasing power, represented by total health expenditure per capita and economic incentives to hospitals in the form of flexible payment methods, were positively correlated with diffusion. Another important achievement of our model is that it accounts for all thirty OECD member countries without excluding any as outliers. This study shows that variation across countries in the diffusion of medical technology can be explained well by a logical model with multiple variables, the results of which hold profound implications for health policy regarding the adoption of innovations.

Effects of the per diem prospective payment system with DRG-like grouping system (DPC/PDPS) on resource usage and healthcare quality in Japan

OBJECTIVES In 2003, Japan introduced the prospective payment system (PPS) with diagnosis-related groups (DRG) rearranged grouping system called the diagnostic procedure combination/per-diem payment system (DPC/PDPS). Even after eight years, little is known about the effects of DPC/PDPS. The purpose of this study was to examine the effects of DPC/PDPS on resource usage and healthcare quality. METHODS Using 2001-2009 (fiscal year) administrative data of acute myocardial infarction patients, four indices, including inpatient total accumulated medical charges, length of stay (LOS), mortality rate, and readmission rate, were compared between patients reimbursed by DPC/PDPS or by fee-for-service. RESULTS DPC/PDPS significantly reduced total accumulated medical charges by

Functional mapping of hospitals by diagnosis-dominant case-mix analysis

1061 (95% confidence interval [CI], -2007, -116) and LOS by 2.29 days (95% CI, -3.71, -0.88) after risk adjustment. However, mortality rate (Odds ratio [OR], 0.94; 95% CI, 0.73, 1.21) was unchanged. Furthermore, DPC/PDPS increased the readmission rate (OR, 1.37; 95% CI, 1.03, 1.82). CONCLUSIONS This study showed that DPC/PDPS was associated with reduced resource usage, but not improved healthcare quality, as with DRG/PPSs in other countries. To achieve successful healthcare reform, further discussion on additional motives will be required.

Development and analysis of a nationwide cost database of acute‐care hospitals in Japan

BackgroundPrinciples and methods for the allocation of healthcare resources among healthcare providers have long been health policy research issues in many countries. Healthcare reforms including the development of a new case-mix system, Diagnosis Procedure Combination (DPC), and the introduction of a DPC-based payment system are currently underway in Japan, and a methodology for adequately assessing the functions of healthcare providers is needed to determine healthcare resource allocations.MethodsBy two-dimensional mapping of the rarity and complexity of diagnoses for patients receiving treatment, we were able to quantitatively demonstrate differences in the functions of different healthcare service provider groups.ResultsOn average, inpatients had diseases that were 3.6-times rarer than those seen in outpatients, while major teaching hospitals treated inpatients with diseases 3.0-times rarer on average than those seen at small hospitals.ConclusionWe created and evaluated a new indicator for DPC, the diagnosis-dominant case-mix system developed in Japan, whereby the system was used to assess the functions of healthcare service providers. The results suggest that it is possible to apply the case-mix system to the integrated evaluation of outpatient and inpatient healthcare services and to the appropriate allocation of healthcare resources among health service providers.

The effect of aging on functional decline among older Japanese living in a community: a 5-year longitudinal data analysis

OBJECTIVES Understanding of hospital cost is crucial to achieve an ideal balance between the assurance and improvement of patient safety and quality, and efficient use of finite resources. However, neither a standardized calculation methodology nor a large-scale database of costs in acute-care hospitals exists in Japan. This study aims to develop a standardized methodology, construct a nationwide cost database in Japan, analyse the characteristics of the database and examine the relationship between the cost and the charge from the viewpoint of an appropriate reflection of the cost to the price. METHOD We designed the costing framework, gathered the data for patients discharged from 139 acute-care hospitals in Japan between July 2004 and October 2004 and constructed a database containing information on 284,730 patients. The characteristics of the database and the relationship between the cost and the charge were investigated. RESULTS In the nationwide database we constructed, a wide range in the average cost per hospitalization and average cost per diem was observed. A wide variation of cost components was seen across major diagnostic categories. Moreover, there was a high correlation between the cost and the charge (Correlation coefficient = 0.94). CONCLUSIONS After designing a costing framework, a nationwide database comprised of individual case-level costs with components for acute-care hospitals in Japan was successfully developed. We hope this study contributes to appropriate decision making and helps motivate further research geared towards efficient hospital management and a rational payment system in Japan.

Functional transitions and active life expectancy for older Japanese living in a community

Background and aims: Using longitudinal data analyses, we examined the effects of aging on functional decline, based on activities of daily living (ADL) and instrumental activities of daily living (IADL) during a 5-year follow-up among older people living in a community in Japan. Methods: The baseline survey in July 1988 involved all elderly residents aged 60 or older in Saku City, Nagano, Japan (N=13418). All survivors of this cohort were asked to participate in follow-up surveys conducted in 1989, 1990, 1991, 1992 and 1993. Five items of ADL and five of IADL were measured on each survey. A generalized estimating equations (GEE) analysis was used to examine the effects of aging on the increase of the proportion of subjects with functional dependence. Results: These results indicated that the proportion of subjects who were dependent in ADL increased during the 5-year period by 2.2 times (p<0.001) and the proportion of those who were dependent in either ADL or IADL increased during the same period by 1.8 times (p<0.001 ). Gender did not appear to be significantly associated with functional decline. Conclusions: The GEE analysis in this study identified the statistically significant effect of aging on the increase of the proportion of subjects with functional dependence based on ADL and IADL.

Factors associated with system-level activities for patient safety and infection control

We examined functional transitions in both the activities of daily living (ADL), and instrumental activities of daily living (IADL), over a 1-year interval among older Japanese living in a community, then estimated their physically active life expectancy (PALE) and instrumentally active life expectancy (IALE). In 1992, all residents aged 65 or older who lived in Saku City, Nagano, Japan, were followed-up over the 1-year interval. A self-administrated questionnaire, which involved age, sex, five ADL items, and five IADL items, was used for each survey in both 1992 and 1993. Of the baseline cohort (n=10,098), we received 9533 analyzable questionnaires at the follow-up survey in 1993. During the follow-up, 92 and 87% of subjects who were initially independent in ADL and IADL remained independent, respectively. PALE for men and women were estimated to be 16.0 and 18.9 at 65 years of age, respectively. IALE for men and for women were estimated to be 12.8 and 14.6 at the age of 65, respectively. Proportions of the PALE to total life expectancy (TLE) at any age did not greatly differ between men and women; however, men had a slightly larger proportion of IALE to TLE at any given age than women.

Lag time in an incident reporting system at a university hospital in Japan

Abstract Objective We examined the relationship between hospital structural characteristics and system-level activities for patient safety and infection control, for use in designing an incentive structure to promote patient safety. Methods This study utilized a questionnaire to collect institutional data about hospital infrastructure and volume of patient safety activities from all 1039 teaching hospitals in Japan. The patient safety activities were focused on meetings and conferences, internal audits, staff education and training, incident reporting and infection surveillance. Generalized linear modeling was used. Results Of the 1039 hospitals surveyed, 418 (40.2%) hospitals participated. The amount of activities significantly increased by over 30% in hospitals with dedicated patient safety and infection control full-time staff (P <0.001 and P <0.01, respectively). High profit margins also predicted the increase of patient safety programs (P <0.01). Perceived lack of administrative leadership was associated with reduced volume of activities (P <0.05), and the economic burden of safety programs was found to be disproportionately large for small hospitals (P <0.05). Conclusions Hospitals with increased resources had greater spread of patient safety and infection control activities. To promote patient safety programs in hospitals, it is imperative that policy makers require the assignment of dedicated full-time staff to patient safety. Economic support for hospitals will also be required to assure that safety programs are sustainable.