The Nudging Effect of a Reminder Letter to Reduce Duplicated Medications: A Randomized Controlled Trial.

BACKGROUND: The increasing trend of multiple chronic conditions across the world has worsened the problem of medication duplication in health care systems without gatekeeping or referral requirement. Thus, to overcome this problem, a reminder letter has been developed in Taiwan to nudge patients to engage in medication management. OBJECTIVE: To evaluate the effect of reminder letter on reducing duplicated medications. RESEARCH DESIGN: A 2-arm randomized controlled trial design. SUBJECTS: Patients with duplicated medications in the first quarter of 2019. MEASURES: The Taiwanese single-payer National Health Insurance Administration identified the eligible patients for this study. A postal reminder letter regarding medication duplication was mailed to the patients in the study group, and no information was provided to the comparison group. Generalized estimation equation models with a difference-in-differences analysis were used to estimate the effects of the reminder letters. RESULTS: Each group included 11,000 patients. Those who had received the reminder letter were less likely to receive duplicated medications in the subsequent 2 quarters (postintervention 1: odds ratio [OR]=0.95, 95% CI=0.87-1.03; postintervention_2: OR=0.99, 95% CI=0.90-1.08) and had fewer days of duplicated medications (postintervention 1: ß=-0.115, P =0.015; postintervention 2 (ß=-0.091, P =0.089) than those who had not received the reminder letter, showing marginal but significant differences. CONCLUSIONS: A one-off reminder letter nudge could mildly decrease the occurrence of duplicated medications. Multiple nudges or nudges incorporating behavioral science insights may be further considered to improve medication safety in health systems without gatekeeping.

Impact of a diabetes pay-for-performance program on nonincentivized mental disorders: a panel study based on claims database analysis.

BACKGROUND: Diabetes is one of the most prevalent chronic diseases with subsequent complications. The positive effects of diabetes pay-for-performance (P4P) programs on treatment outcomes have been reported. The program provides financial incentives based on physiological care indicators, but common mental disorder complications such as depression are not covered. METHODS: This study employed a natural experimental design to examine the spillover effects of diabetes P4P program on patients with nonincentivized depressive symptoms. The intervention group consisted of diabetes patients enrolled in the DM P4P program from 2010 to 2015. Unenrolled patients were selected by propensity score matching to form the comparison group. Difference-in-differences analyses were conducted to evaluate the effects of P4P programs. We employed generalized estimating equation (GEE) models, difference-in-differences analyses and difference-in-difference-in-differences analyses to evaluate the net effect of diabetes P4P programs. Changes in medical expenses (outpatient and total health care costs) over time were analysed for the treatment and comparison groups. RESULTS: The results showed that enrolled patients had a higher incidence of depressive symptoms than unenrolled patients. The outpatient and total care expenses of diabetes patients with depressive symptoms were lower in the intervention group than in the comparison group. Diabetes patients with depressive symptoms enrolled in the DM P4P program had lower expenses for depression-related care than those not enrolled in the program. CONCLUSIONS: The DM P4P program benefits diabetes patients by screening for depressive symptoms and lowering accompanying health care expenses. These positive spillover effects may be an important aspect of physical and mental health in patients with chronic disease enrolled in disease management programs while contributing to the control of health care expenses for chronic diseases.

Determining the factors influencing the selection of post-acute care models by patients and their families: a qualitative content analysis.

BACKGROUND: This study conducted in-depth interviews to explore the factors that influence the choice of a post-acute care (PAC) model (inpatient rehabilitation hospital, skilled nursing facility, home health, and outpatient rehabilitation) among stroke patients and their families. METHODS: We conducted semi-structured, in-depth interviews of 21 stroke patients and their families at four hospitals in Taiwan. Content analysis was used in this qualitative study. RESULTS: Results revealed five main factors that influence respondents' choice of PAC: (1) medical professionals' suggestions, (2) health care accessibility, (3) continuity and coordination of care, (4) willingness and prior experience of patients and their relatives and friends, and (5) economic factors. CONCLUSIONS: This study identifies five main factors that affect the choice of PAC models among stroke patients and their families. We suggest that policymakers establish comprehensive health care resources based on the needs of patients and families. Health care providers shall provide professional recommendations and adequate information to support decision-making, which aligns with the preferences and values of patients and their families. From this research, we hope to improve the accessibility of PAC services in order to enhance the quality of care for stroke patients.

Efficacy of polyacrylate silver salt/polyvinylpyrrolidone-based liquid oral gel in management of concurrence chemoradiotherapy-induced oral mucositis.

BACKGROUND/PURPOSE: Acute oral mucositis (OM) is a painful complication of concurrent chemoradiotherapy (CCRT). This severe adverse symptom may impact on patient's quality of life, lead to malnutrition. Thus, finding more effective methods in OM management is very important. The purpose of this study is to evaluate the efficacy of polyacrylate silver salt/Polyvinylpyrrolidone-based liquid oral gel (named as polyacrylate silver salt oral gel) in improving the symptomatic relief of CCRT-induced oral mucositis and oral dysfunction in neck and head cancer patients. METHODS: In this study, 24 oral cancer patients underwent CCRT and having OM grade 2 or higher were randomly assigned into the test group and the control group. Both groups followed Multinational Association of Supportive Care in Cancer and International Society of Oral Oncology (MASCC/ISOO) clinical practice guidelines for the management of mucositis, but adding rinsing with 15 g oral gel right after oral hygiene treaded the test group. Clinical OM and oral function were assessed weekly for 4 consecutive weeks till 5-10 days after the completion of radiotherapy. For evaluation, Common Terminology Criteria for Adverse Events (CTCAE) v3.0 was used for collecting the data of OM grade. RESULTS: The results showed that polyacrylate silver salt oral gel had better effect for relieving the oral mucositis. There were statistically significant differences in OM grades (1.59 vs. 2.8, p < 0.0001) between the test group and the control group. CONCLUSION: Our clinical studies demonstrated that polyacrylate silver salt oral gel is an effective interventional option in terms of rapid mucositis healing.

Determinants associated with medical-related long-term care service use among community-dwelling older adults in Taiwan.

INTRODUCTION: Medical-related long-term care (LTC) service use among community-dwelling older adults in Taiwan is resource-intensive, and planning is essential to promote aging-in-place. METHODS: Administrative data from 4/1/2017 to 11/26/2019 among more than 14,000 residents were analyzed with generalized estimating equations (GEEs) to identify determinants of medical-related LTC service use. RESULTS: Older adults using medical-related LTC services tended to be younger (79.9 vs. 80.7; p<.0001), male (42.7% vs. 38.5%; p<.0001), multi-morbid (3.1 vs. 2.5; p<.0001), and higher mean activities of daily living (ADL) disability (8.2 vs. 4.2; p<.0001), instrumental ADL (IADL) disability (11.0 vs. 9.1; p<.0001), and hospitalizations (1.1 vs. 0.4; p<.0001). Significant determinants of medical-related LTC services include age, education, stroke, coronary heart disease, diabetes, vision impairment, ADL disability, and prior hospitalization. DISCUSSION: The success of LTC 2.0 will depend on ADL support and care coordination to manage chronic conditions such as diabetes, vision impairment, coronary heart disease, and stroke.

The Gaps of Healthcare Service Quality in Nurse Practitioner Practice and Its Associated Factors From the Patients' Perspective.

PURPOSE: This study investigates the expectations, perceptions, and gaps of the healthcare service quality (HSQ) from the patients' perspective, and explores the significant demographic and clinical factors associated with the HSQ in nurse practitioner practice (NPP). DESIGN: A cross-sectional design was carried out, with convenience sampling performed under the NPP in Taiwan, from June to November 2016. METHODS: The Nurse Practitioner Healthcare Service Quality Scale was used to assess the expectations, perceptions, and gaps of the HSQ. The demographics, clinical characteristics, and symptom severity of patients were collected, and the Importance-Performance Analysis was applied to identify the priority of ranking items for the improvement of nurse practitioners (NPs). The Generalized Estimating Equation was used to explore the factors associated with the HSQ in NPP. FINDINGS: A total of 200 patients completed the questionnaires. The results revealed that the patients had overall high expectations (M = 6.35, SD = 0.46), moderate perceptions (M = 4.21, SD = 0.95), and a mild HSQ gap (M = -2.14, SD = 0.69), with statistically significant differences (p < .001). In NPP, the largest gap in the HSQ dimensions was reliable responsiveness, followed by empathy, assurance, and tangibility. Patients with greater symptom severity and a longer in-hospital stay were associated with larger HSQ gaps; however, patients who were transferred from the emergency department had smaller gaps than those in the outpatient department. CONCLUSIONS: The patients' expectations were not fully satisfied in the NPP, especially for the dimensions of reliable responsiveness and empathy. The patients' symptom severity was a significant factor related to the gaps in the HSQ. The awareness of unmet needs, from the patients' perspective, could guide the convergence of a rational policy to promote healthcare delivery in the NPP. CLINICAL RELEVANCE: The managers of NPP need to pay attention to increasing NPs' reliable responsiveness and empathy, by setting the appropriate scope of practice, regulating the NP-to-patient ratio, applying for certification programs in prescribing training, and cultivating patient-centered care with shared decision making. In addition, building up the knowledge and competency of symptom management is also suggested for NP training.

[Development and Psychometric Testing of the Nurse Practitioner Healthcare Service Quality Scale].

BACKGROUND: Many hospitals in Taiwan currently use the nurse practitioner (NP) care model to ameliorate the chronic shortage of resident physicians. However, no healthcare service quality scale is presently available that allows the evaluation of the healthcare quality provided by NPs from the perspective of patients. A scale of this type is necessary in order to effectively monitor and improve care outcomes. PURPOSE: This project was designed to develop the Nurse Practitioner Healthcare Service Quality Scale (NPHSQS) and then to test its validity and reliability. METHODS: A cross-sectional design combined with Parasuraman, Zeithaml, and Berry's Service Quality Model was adopted to construct the NPHSQS. After expert evaluation and confirmation of the model's content validity, 200 valid questionnaires were collected from a convenience sample of patients from medical center wards in northern Taiwan that regularly used the NP care model. The data were analyzed by group using item analysis, construct validity, internal consistency, and discriminant validity. RESULTS: The 25-item NPHSQS developed in this study earned a CVI (content validity index) of .91 and a good CR (critical ratio). Exploratory factor analysis revealed that four factors extracted in the expectation level, including reliable responsiveness, assurance, empathy, and tangibility, explained 62.47% of the total variance. Furthermore, three factors extracted in the perception level, including reliable responsiveness, trust, and tangibility, explained 67.71% of the total variance. The NPHSQS has a good overall internal consistency coefficient and may also significantly distinguish differences in patient satisfaction between good and bad healthcare service quality groups (p < .001). CONCLUSIONS: The developed NPHSQS has good reliability and validity and is a reliable instrument for assessing the quality of NP-provided healthcare services from the perspective of healthcare recipients.

Quality of life of breast cancer survivors following breast-conserving therapy versus mastectomy: a multicenter study in Taiwan.

BACKGROUND: Breast cancer is the most common female malignancy worldwide. The aim of this study was to investigate the influence of surgical procedures and quality-of-care (QoC) on quality-of-life (QoL) among breast cancer survivors who underwent breast-conserving therapy (BCT) or mastectomy, and to identify provider- and patient-related factors pertaining to QoL. METHOD: In this cross-sectional study, structured-questionnaires were distributed among breast cancer survivors in 19 hospitals. QoL was evaluated using the European Organization for Research and Treatment of Cancer core questionnaire (EORTC QLQ-C30) and the breast cancer specific module (EORTC QLQ-BR23). QoC is indicated by adherence to the core measures stipulated for the treatment of breast cancer. Multiple regression and hierarchical linear modeling were used for multivariate analysis. RESULTS: A total of 544 female survivors of Stage 0-III breast cancer were included, among whom 217 (39.9%) underwent BCT and 327 (60.1%) underwent mastectomy. Surgical modality does not appear to have a notable impact on any QoL domains except body image; i.e. patients who underwent BCT reported better body image (diff = 11.20, P < 0.001), particularly at 1-5 years after the initial treatment. Independent factors including age, education, employment, marital status, income, chemotherapy, duration since treatment, recurrence status, primary hospital accreditation level and location all appear to be correlated to QoL. CONCLUSION: Patients with breast cancer should be informed of differences in QoL when discussing treatment options. Furthermore, physicians should recognize that the impact of surgical treatment modality on QoL may vary according to patients' sociodemographic and clinical characteristics.

Is vegetarian diet associated with a lower risk of breast cancer in Taiwanese women?

BACKGROUND: Studies on the relationship between vegetarian diet and breast cancer in Asian populations are limited. This study aimed to investigate the relationship between vegetarian diet, dietary patterns, and breast cancer in Taiwanese women. METHODS: This case-control study compared the dietary patterns of 233 breast cancer patients and 236 age-matched controls. A questionnaire about vegetarian diets and 28 frequently-consumed food items was administered to these 469 patients in the surgical department of Taipei Tzu Chi Hospital. Serum biochemical status was also examined. RESULTS: There were no significant differences between the two groups for age, education, family history, oral contraceptive usage, or regular exercise. However, the cancer group presented with both a higher body mass index and an older age of primiparity (P < 0.05). Two food items (shellfish and seafood) were highly correlated (correlation coefficient = 0.77), so shellfish was excluded to avoid multicollinearity. A factor analysis of 27 food items produced five dietary patterns: meat, processed meat, fruit/vegetable/soybean, dessert/sugar, and fermented food. Multivariate logistic regression showed that meat/fat and processed meat dietary patterns were associated with breast cancer risk (odds ratio (OR): 2.22, 95% CI 1.67-2.94, P < 0.001; OR: 1.49, 95% CI 1.09-2.04, P = 0.013, respectively). Vegetarian diet, high isoflavone intake, and high albumin levels were inversely associated with breast cancer risk (P < 0.05). Vegetarians had a higher daily soy isoflavone intake than non-vegetarians (25.9 ± 25.6 mg vs. 18.1 ± 15.6 mg, P < 0.001). CONCLUSIONS: Vegetarian diets show as protective role against breast cancer risk, while meat and processed meat dietary patterns are associated with a higher breast cancer risk.

The laparoscopic right gastroepiploic lymph node flap transfer for upper and lower limb lymphedema: Technique and outcomes.

BACKGROUND: Lymph node flap transfer popularity for treatment of extremity lymphedema is increasing quickly. Multiple flap donor sites were described in search of the optimal one. We describe the technique and outcomes of a laparoscopically harvested right gastroepiploic lymph node flap for treatment of extremity lymphedema. METHODS: From January 2012 to January 2013, 10 consecutive female patients, average age 54.8 years, with International Society of Lymphology stage II-III extremity lymphedema refractory to conservative management were included. Five patients had upper limb breast cancer-related lymphedema and five patients had lower limb pelvic cancer-related lymphedema. All patients underwent laparoscopic harvest of the right gastroepiploic lymph node flap, transferred to the wrist and ankle as recipient sites. Flaps were covered with a small skin graft taken from the thigh. Perioperative assessment included physical exam, photography, circumference measurements, CT scans, lymphoscintigraphy, and Lymphedema Quality of Life (LYMQOL) questionnaire. Clinical and CT evaluation of donor-site morbidity were performed. RESULTS: The flap survival rate was 100%, with a mean harvest time of 32 minutes and total operating time of 164 minutes. One case required regrafting for skin graft loss. The mean limb reduction rate was 39.5% at a mean follow-up of 14.7 months. Perioperative lymphoscintigraphy demonstrated transferred lymph node viability and lymphatic transport improvement. LYMQOL showed a 2.6-fold quality-of-life improvement (P < 0.01). No donor-site morbidity was encountered. CONCLUSIONS: The use of the laparoscopically harvested right gastroepiploic lymph node flap may be a safe technique that improves limb measurements and quality of life in extremity lymphedema patients. © 2015 Wiley Periodicals, Inc. Microsurgery 37:197-205, 2017.

Participating physician preferences regarding a pay-for-performance incentive design: a discrete choice experiment.

OBJECTIVE: To determine whether the magnitude of incentives or other design attributes should be prioritized and the most important attributes, according to physicians, of the diabetes P4P (pay-for-performance) program design. DESIGN: We implemented a discrete choice experiment (DCE) to elicit the P4P incentive design-related preferences of physicians. PARTICIPANTS: All of the physicians (n = 248) who participated in the diabetes P4P program located in the supervisory area of the northern regional branch of the Bureau of National Health Insurance in 2009 were included. The response rate was ∼ 60%. RESULTS: Our research found that the bonus type of incentive was the most important attribute, followed by the incentive structure and the investment magnitude. CONCLUSIONS: Physicians may feel that good P4P designs are more important than the magnitude of the investment by the insurer. The two most important P4P designs include providing the bonus type of incentive and using pay-for-excellence plus pay-for-improvement.

Measuring Preferences for a Diabetes Pay-for-Performance for Patient (P4P4P) Program using a Discrete Choice Experiment.

OBJECTIVE: To elicit a patient's willingness to participate in a diabetes pay-for-performance for patient (P4P4P) program using a discrete choice experiment method. METHODS: The survey was conducted in March 2013. Our sample was drawn from patients with diabetes at five hospitals in Taiwan (International Classification of Diseases, Ninth Revision, Clinical Modification code 250). The sample size was 838 patients. The discrete choice experiment questionnaire included the attributes monthly cash rewards, exercise time, diet control, and program duration. We estimated a bivariate probit model to derive willingness-to-accept levels after accounting for the characteristics (e.g., severity and comorbidity) of patients with diabetes. RESULTS: The preferred program was a 3-year program involving 30 minutes of exercise per day and flexible diet control. Offering an incentive of approximately US $67 in cash per month appears to increase the likelihood that patients with diabetes will participate in the preferred P4P4P program by approximately 50%. CONCLUSIONS: Patients with more disadvantageous characteristics (e.g., elderly, low income, greater comorbidity, and severity) could have less to gain from participating in the program and thus require a higher monetary incentive to compensate for the disutility caused by participating in the program's activities. Our result demonstrates that a modest financial incentive could increase the likelihood of program participation after accounting for the attributes of the P4P4P program and patients' characteristics.

Do relationships exist between the scope and intensity of quality improvement activities and hospital operation performance? A 10-year observation in Taiwan.

BACKGROUND: The relationship between the scope and intensity of quality improvement (QI) activities and hospital performance remains unclear. This study investigated the relationship between performance, external environment, and the scope and intensity of QI activities in hospitals. METHODS: The study used a longitudinal observation. Data regarding the scope and intensity of QI activities were collected using a questionnaire survey among the administrative deputy superintendents / directors of quality management center in 139 hospitals. Hospital performance indicators were abstracted from the 2000-2009 national hospitals profiles. We adopted year 2000 as the baseline, and divided the study period into three 3-year periods. The Generalized Estimating Equations (GEE) model was used for the statistical analysis. RESULTS: Seventy-two hospitals responded to the survey, giving a response rate of 52%. The results showed a significant increase in the scope and intensity of QI activities between 2000 and 2009. The results also showed that the scope and intensity of a hospital's QI activities were associated with the scope and intensity of its competitors' QI activities in the previous period and its own prior performance. The scope of QI activities in the previous period was not significantly related to the selected hospital performance measures. However, the intensity of QI activities in the previous period showed a significant and positive relationship with the number of inpatients and the turnover of beds. CONCLUSION: The study demonstrates that the intensity of QI activities is associated with the external environment and the hospital's own performance in the previous period. Furthermore, some performance measures are associated with the intensity of the QI activities in the previous period.

Why do outcomes of CABG care vary between urban and rural areas in Taiwan? A perspective from quality of care.

OBJECTIVE: This study explores the association between coronary artery bypass surgery (CABG) patients' residence and quality of care in terms of 30-day mortality. DESIGN: A retrospective, multilevel study design was conducted using claims data from Taiwan's Universal Health Insurance Scheme. Hospital and surgeon's CABG operation volume, risk-adjusted surgical site infection rate and risk-adjusted 30-day mortality rate in the previous year were adopted as performance indicators, and the level of quality was evaluated via K-means clustering algorithm. Baron and Kenny's procedures for mediation effect were conducted. SETTING: Hospitals in Taiwan. PARTICIPANTS: Patients who underwent CABG surgeries from 1 January 2008 to 30 September 2011 were identified in this study. However, patients who were under the age of 18 years or above the age of 85(n = 164), with missing data for gender (n = 3) or received surgeries from surgeons who never performed any CABG surgeries (n = 27), were excluded. INTERVENTIONS: None. MAIN OUTCOME MEASURES: Thirty-day mortality. RESULTS: There were 9973 CABG surgeries included in this study. Patients who lived in urban areas received better quality of care (28.90 vs. 21.57%) and enjoyed better outcome (4.33 vs. 6.84%). After the procedure of mediation effect testing, the results showed that the relationship between patient residence's urbanization level and 30-day mortality was partially mediated by patterns of quality of care. CONCLUSIONS: The rural-dwelling CABG patients are less likely to approach the better performing healthcare providers, and this tendency indirectly affects their treatment outcomes. Policymakers still need to develop strategies to ensure better equity in access to quality health care.

Processes and outcomes of ischemic stroke care: the influence of hospital level of care.

OBJECTIVE: Processes of stroke care play an increasingly important role in comparing hospital performance. The relationship between processes of care and outcomes for stroke is unclear. Moreover, in terms of stroke care regionalization, little information is available with regard to the relationships among hospital level of care, processes and outcomes of stroke care. We used nationwide population-based data to examine the relationship between processes of care and mortality and the relationships among hospital level of care, processes and mortality for ischemic stroke. DESIGN: Cross-sectional study. SETTING: General acute care hospitals throughout Taiwan. PARTICIPANTS: A total of 31 274 ischemic stroke patients admitted in 2010 through Taiwan's National Health Insurance Research Database. MAIN OUTCOME MEASURES: Processes of care and 30-day mortality. Multilevel models were used after adjustment for patient and hospital characteristics to test the relationship between processes of care and 30-day mortality and the relationships among hospital level of care, processes and 30-day mortality. RESULTS: The use of thrombolytic therapy, antithrombotic therapy, statin treatment and rehabilitation assessment was associated with lower mortality. Hospital level of care was associated with the use of thrombolytic therapy, antithrombotic therapy, statin treatment and rehabilitation assessment, and mortality. These processes of care were mediators of the relationship between hospital level of care and mortality. CONCLUSIONS: Outcomes among patients with ischemic stroke can be improved by thrombolytic therapy, antithrombotic therapy, statin treatment and rehabilitation assessment. Among patients with ischemic stroke, admission to designated stroke center hospitals may be associated with lower mortality through better processes of care.

Shorter Door-to-Balloon Time in ST-Elevation Myocardial Infarction Saves Insurance Payments: A Single Hospital Experience in Taiwan.

BACKGROUND: The relationship between quality of care and cost of medical services is a popular topic. In this study, we examined whether a reduced door-to-balloon (D2B) time led to cost savings, benefitted insurance payers, and improved patient outcomes. METHODS: We retrospectively enrolled consecutive patients who presented with ST-segment elevation myocardial infarction (STEMI) and received primary percutaneous coronary intervention (PCI) between Feb. 1, 2007, and Jul. 31, 2009, at a tertiary hospital in Taiwan. The patient data were collected by chart review. We utilized claims data from the hospital financial system as the proxy for insurance payer costs. We only included the claims data, regardless of whether patients were inpatients or outpatients, associated with the first three cardiovascular related ICD-9 codes. Multivariable logistic regression was used to examine the relationships between the D2B time, in-hospital mortality and one-year cardiovascular readmission. We utilized a multivariable linear regression to test the relationships between the D2B time, hospitalization cost and one-year cardiovascular-related cost. RESULTS: The D2B time did not influence the in-hospital mortality rate, but a D2B time greater than 90 min increased the probability of one-year cardiovascular readmission (p = 0.018). The D2B time did not increase the index hospitalization cost, but patients with a D2B time above 90 min had 14.6% higher one-year cardiovascular- related costs. CONCLUSIONS: Our study shows that the D2B time in patients with STEMI could impact the one-year cardiovascular readmission and one-year cardiovascular-related health cost. These results suggest that the pursuit of high-quality care not only leads to better outcomes, but also reduces costs. KEY WORDS: Acute myocardial infarction; Cost; Door-to-balloon time; Insurance payer; Quality.

Do low-income coronary artery bypass surgery patients have equal opportunity to access excellent quality of care and enjoy good outcome in Taiwan?

BACKGROUND: Equity is an important issue in the healthcare research field. Many studies have focused on the relationship between patient characteristics and outcomes of care. These studies, however, have seldom examined whether patients' characteristics affected their access to quality healthcare, which further affected the care outcome. The purposes of this study were to determine whether low-income coronary artery bypass surgery (CABG) patients receive healthcare services with poorer quality, and if such differences in treatment result in different outcomes. METHODS: A retrospective multilevel study design was conducted using claims data from Taiwan's universal health insurance scheme for 2005-2008. Patients who underwent their CABG surgery between 2006 and 2008 were included in this study. CABG patients who were under 18 years of age or had unknown gender or insured classifications were excluded. Hospital and surgeon's performance indicators in the previous one year were used to evaluate the level of quality via k-means clustering algorithm. Baron and Kenny's procedures for mediation effect were conducted to explore the relationship among patient's income, quality of CABG care, and inpatient mortality. RESULTS: A total of 10,320 patients were included in the study. The results showed that 5.65% of the low-income patients received excellent quality of care, which was lower than that of patients not in the low-income group (5.65% vs.11.48%). The mortality rate of low-income patients (12.10%) was also higher than patients not in the low-income group (5.25%). Also, the mortality of patients who received excellent care was half as low as patients receiving non-excellent care (2.63% vs. 5.68%). Finally, after the procedure of mediation effect testing, the results showed that the relationship between patient income level and CABG mortality was partially mediated by patterns of quality of care. CONCLUSIONS: The results of the current study implied that worse outcome in low-income CABG patients might be associated with poorer quality of received services. Health authorities should pay attention to this issue, and propose appropriate solutions.

Is the implementation of quality improvement methods in hospitals subject to the neighbourhood effect?

OBJECTIVE: Quality improvement (QI) methods have been fashionable in hospitals for decades. Previous studies have discussed the relationships between the implementation of QI methods and various external and internal factors, but there has been no examination to date of whether the neighbourhood effect influences such implementation. The aim of this study was to use a multilevel model to investigate whether and how the neighbourhood effect influences the implementation of QI methods in the hospital setting in Taiwan. DESIGN: This is a retrospective questionnaire-based survey. SETTING: All medical centres, regional hospitals and district teaching hospitals in Taiwan. PARTICIPANTS: Directors or persons in charge of implementing QI methods in hospitals. INTERVENTIONS: None. MAIN OUTCOME MEASURES: The breadth and depth of QI method implementation. RESULTS: Seventy-two of the 139 hospitals contacted returned the questionnaire, yielding a 52% response rate. The breadth and depth of QI method implementation increased over the 10-year study period, particularly between 2004 and 2006. The breadth and depth of the QI methods implemented in the participating hospitals were significantly associated with the average breadth and depth of those implemented by their competitors in the same medical area during the previous period. In addition, time was positively associated with the breadth and depth of QI method implementation. CONCLUSIONS: In summary, the findings of this study show that hospitals' QI implementation status is influenced by that of their neighbours. Hence, the neighbourhood effect is an important factor in understanding hospital behaviour.

Is it possible to identify cases of coronary artery bypass graft postoperative surgical site infection accurately from claims data?

BACKGROUND: Claims data has usually been used in recent studies to identify cases of healthcare-associated infection. However, several studies have indicated that the ICD-9-CM codes might be inappropriate for identifying such cases from claims data; therefore, several researchers developed alternative identification models to correctly identify more cases from claims data. The purpose of this study was to investigate three common approaches to develop alternative models for the identification of cases of coronary artery bypass graft (CABG) surgical site infection, and to compare the performance between these models and the ICD-9-CM model. METHODS: The 2005-2008 National Health Insurance claims data and healthcare-associated infection surveillance data from two medical centers were used in this study for model development and model verification. In addition to the use of ICD-9-CM codes, this study also used classification algorithms, a multivariable regression model, and a decision tree model in the development of alternative identification models. In the classification algorithms, we defined three levels (strict, moderate, and loose) of the criteria in terms of their strictness. Sensitivity, specificity, positive predictive value, negative predictive value, and accuracy were used to evaluate the performance of each model. RESULTS: The ICD-9-CM-based model showed good specificity and negative predictive value, but sensitivity and positive predictive value were poor. Performances of the other models were varied, except for negative predictive value. Among the models, the performance of the decision tree model was excellent, especially in terms of positive predictive value. CONCLUSION: The accuracy of identification of cases of CABG surgical site infection is an important issue in claims data. Use of the decision tree model to identify such cases can improve the accuracy of patient-level outcome research. This model should be considered when performing future research using claims data.