Biomedical subjects

Herng-Ching Lin

Publications and source records attributed to Herng-Ching Lin.

At least 37 records · Page 2Linked to original sources

PubMed2006

Seasonality in adult asthma admissions, air pollutant levels, and climate: a population-based study.

OBJECTIVE AND BACKGROUND: Most studies of asthma seasonal variations have not examined associations of environmental risk factors and climatic changes associated with seasonality in asthma hospitalizations. This study used population-based data to examine seasonality in asthma admissions and the associated seasonality in levels of air pollutants and climatic factors during a 4-year period in Taiwan. METHODS: A total of 126,671 asthma hospitalizations in Taiwan during 1998-2001 operationalized as monthly admissions per 100,000 population and monthly mean levels of criterion air pollutants and meteorological factors were subjected to Auto-Regressive Integrated Moving Average to test for seasonality and association between asthma admission rates and the pollutant and climatic factor levels. Owing to significant differences in seasonality between pediatric and adult age groups, this study was limited to 99,591 adult asthma cases to examine the seasonality issue as related to the criterion air pollutants and climatic factors using Spearman rank correlations. RESULTS: Seasonal trends showed a hospitalization peak in January through March and a sharp decline beginning in April to a trough in June for both sexes. Seasonal variations in adult asthma admissions were significantly positively correlated with levels of PM10, SO2, CO, NO2, and atmospheric pressure and negatively correlated with temperature and hours of sunshine. CONCLUSIONS: Adult asthma hospitalization propensity is highest in spring and is significantly correlated with air pollution and climate. Air quality control programs and early public warning systems on pollution and atmospheric factors are needed to enable predisposed individuals and their physicians to preempt attacks through primary and secondary preventive measures.

Adolescent↗

PubMed2006

Do group practices have lower caesarean rates than solo practice obstetric clinics? Evidence from Taiwan.

OBJECTIVE: This study examined physicians' propensity for caesarean deliveries at solo versus group practice obstetrics/gynaecology (ob/gyn) clinics in Taiwan. METHOD: We used population-based (National Health Insurance) claims data covering all 253 618 singleton deliveries conducted at ob/gyn clinics, during 2000-02. The dependent variable, delivery mode, was treated as dichotomous [caesarean section (CS) = 1, vaginal delivery (VD) = 0]. The independent variable of interest was practice size, classified into four categories: 1, 2, 3 and 4+ physicians. Multilevel logistic regression modelling, accounting for clinic-level variation in CS rates, was used to examine CS likelihood by practice size, among the total delivery sample and among the sub-samples disaggregated by obstetric complication status. RESULTS: Solo practices have 7% excess caesarean cases relative to large group practices. After controlling for patient's age, physician demographics, the clinic's geographic location and size of delivery service, and clinic-level random effect, solo practice physicians were 5.38 times as likely as 4+ physician practices to provide caesarean delivery (CI = 4.18 approximately 6.93), 2-physician practices were 3.87 times (CI = 2.99 approximately 5.01) and 3-physician practices 2.72 times (CI = 2.06 approximately 3.59) as likely as 4+ physician practices to provide caesarean delivery. This effect is driven by higher CS propensity among solo and small groups among cases with obstetrically less salient complications and the 'no complications' subset of patients. Wide confidence intervals for odds ratios in these sub-samples also attest to wide variations in clinic-level CS rates among these patient groups. CONCLUSIONS: Solo physicians are the most likely to provide caesarean delivery, and CS likelihood decreases with increasing number of physicians in the practice. Group practice support may reduce the CS likelihood, when it is not clinically indicated. Policy makers should consider initiatives to limit full service delivery privileges to group practice obstetric clinics, in order to reduce unnecessary CS. Solo practice clinics should, at best, be licensed as birthing centres, required to transfer patients needing CS to a larger facility.

Adolescent↗

PubMed2006

Delayed parenthood and the risk of cesarean delivery--is paternal age an independent risk factor?

BACKGROUND: Between 1995 and 2001, the average cesarean section rates in Taiwan were as high as 33.34 percent. This study set out to determine the independent effects of paternal age on the likelihood of cesarean delivery among a sample of Taiwanese women. METHODS: Logistic regressions were used to analyze 310,574 singleton deliveries by nulliparous women in Taiwan between 1999 and 2001, linking data abstracted from birth certificates and from the National Health Insurance claims database. After controlling for socioeconomic, pregnancy, and obstetric complications, as well as institutional factors, we investigated both maternal and paternal ages simultaneously, using the single category variable "parental age" to determine the differential age effects on the risk of cesarean delivery. RESULTS: Taking 20- to 29-year-old couples as the reference group, we observed that the relative risks of cesarean delivery become progressively higher with advancing age of the mother. At the same time, within each maternal group, positive and significant variations in cesarean rates occurred for different paternal age groups. The respective increases in the relative risks of cesarean delivery for men aged 20-29, 30-34, 35-39, and 40 years or more, in conjunction with women aged 20-29, 30-34 and 35 or over, are 34 percent from 1.00 to 1.34, 18 percent from 1.51 to 1.69, and 16 percent from 2.03 to 2.19. Other confounding variables are also taken into account. CONCLUSIONS: Irrespective of maternal age, advancing paternal age also appears to be an additional independent factor that has a strong association with the increase in cesarean section rates.

Adult↗

PubMed2006

Impact of a cultural belief about ghost month on delivery mode in Taiwan.

BACKGROUND: Many Chinese believe the lunar month of July, "ghost month" is inauspicious for major surgical procedures. This study hypothesised that caesaren delivery (CS) rates will be significantly lower during lunar July, and higher than normal during June, representing preemptive caesaren delivery to avoid delivering in July. METHODS: Population based data from Taiwan on all singleton deliveries during 1997-2003 (1 750 862 cases) were subjected to multivariate autoregressive integrated moving average (ARIMA) modelling, adjusting for major obstetric complications (previous CS, breech presentation, dystocia, and fetal distress). RESULTS: ARIMA intervention models showed significantly lower CS rates in lunar July, and among younger age groups (p<0.001), but not among 35 plus aged mothers. Incidence of previous CS, is significantly higher among June deliveries, while the incidence of the remaining major complications is similar in July, June, and other months. Patients with clinically less salient obstetric complications show significantly lower CS rates in July. CONCLUSIONS: Adjusted CS rates during the ghost month are significantly lower than other months. Lunar June shows an increase in deliveries of previous CS mothers (almost all by CS), suggesting elective CS to preempt CS in July. A major policy implication is that health education must be launched to dissipate the cultural belief about the ghost month. Evidence also implies some proportion of clinically un-indicated CS in other months, showing the need for professional and policy initiatives to reduce unnecessary CS. Policy makers and researchers in other countries should be alert to cultural beliefs associated with delivery to enable informed delivery choices by mothers.

Adolescent↗

PubMed2006

Physician and hospital characteristics related to length of stay for acute myocardial infarction patients: a 3-year population-based analysis.

BACKGROUND: The lack of studies on the simultaneous contributions of hospital and physician to the length of stay (LOS) for acute myocardial infarction (AMI) has hampered the development of hospital- and physician-level strategies by clinicians and policymakers. This study used 3 years of population-based data to examine the relationships of physician and hospital characteristics with LOS for AMI patients in Taiwan. METHODS AND RESULTS: Multiple regression analysis was carried out to explore the relationships, using the 2001-2003 National Health Insurance Research Database of the National Health Research Institute, Taiwan. The study samples were identified by a principal diagnosis of AMI (ICD-9-CM code 410), with a total of 19,907 eligible admissions. The mean LOS was 9.1 days. The results revealed that compared with district hospitals, the LOS was significantly longer in both medical centers and regional hospitals (both p<0.001). The LOS among patients attended by cardiologists was 28.0% shorter than those attended by physicians specializing in surgery, family medicine, or emergency medicine. CONCLUSIONS: The results of this study demonstrate that there are wide variations among the different types of physician and levels of hospital in the LOS for AMI patients, which highlights the importance of developing national treatment protocols for AMI in order to reduce variations in hospital and physician behaviors.

Acute Disease↗

PubMed2005

The association between psychiatrist numbers and hospitalization costs for schizophrenia patients: a population-based study.

OBJECTIVE: This study explores the association between psychiatrist case volumes and costs for hospitalized schizophrenia patients. METHODS: The study uses the Taiwan National Health Insurance Research Database for 2003, identifying the study subjects from the database by ICD-9-CM principal diagnosis code 295. Our study sample comprises of 135,621 admissions treated by 787 psychiatrists in 181 hospitals, with the sample being divided equally into three psychiatrist volume groups: or=601 admissions (high volume). After adjusting for psychiatrist, patient and hospital characteristics, multiple regression analyses were performed to determine the association between psychiatrist case volume and hospitalization costs (total, drug, and non-drug). RESULTS: The regression analyses showed that after adjusting for psychiatrist, patient and hospital characteristics, average treatment costs associated with hospitalized schizophrenia patients were inversely related to psychiatrist volume. The respective total costs, drug costs and non-drug costs of patients treated by high-volume psychiatrists were 369 US dollars (p<0.001), 26 US dollars (p<0.001) and 343 US dollars (p<0.001) lower than those of low-volume psychiatrists. The respective total costs, drug costs and non-drug costs for those treated by medium-volume psychiatrists were 248 US dollars (p<0.001), 22 US dollars (p<0.001) and 226 US dollars (p<0.001) lower than those of low-volume psychiatrists. CONCLUSIONS: We find that after adjusting for patient, psychiatrist and hospital characteristics, an inverse volume-cost relationship exists for psychiatrists treating schizophrenia patients. Further studies should aim to investigate the volume-quality relationship to ensure that incremental cost savings associated with increased patient volume are not achieved at the expense of quality of patient care.

Adolescent↗

PubMed2005

Factors contributing to patient dumping in Taiwan.

OBJECTIVE: Little research has been carried out to explore the issues surrounding patient dumping outside of the US. This study, therefore, uses a national research survey to examine the factors contributing to patient dumping within Taiwan. METHODS: A self-administered postal survey was undertaken to assess the prevalence of patient dumping in Taiwan, with the study subjects being superintendents of general hospitals. Data from the Bureau of Medical Affairs at the Department of Health in Taiwan were used in conjunction with the Taiwan National Health Insurance Research Database (NHIRD) to obtain estimates of factors potentially contributing to patient dumping. A multiple logistic regression analysis was performed to determine the relationships between the perceived extent of patient dumping occurring within the respondents' healthcare networks, as well as other factors, including the total number of hospitals, total number of hospital beds, the percentages of beds in public, for-profit and teaching hospitals (vis-à-vis all hospital beds), discharges, discharges covered under the case payment system, transferred inpatients, and the perceived degree of competition within each healthcare market. RESULTS: A total of 485 survey questionnaires were distributed, of which 251 were returned, giving a response rate of 51.75%. The responses from 29.9% of the sample group indicated that the perceived extent of patient dumping occurring in their service area was 'serious' or 'very serious'. The regression analysis showed that after controlling for other factors, the superintendents' perceived extent of the patient dumping occurring within their healthcare networks was positively related to the total number of patients covered under the case payment system, the total number of discharged patients, the extent of healthcare market competition and the number of respondent's hospital beds. CONCLUSIONS: We conclude from our findings that, under the National Health Insurance system, patient dumping is a widespread problem within Taiwan's healthcare industry.

Health Services Research↗

PubMed2005

Effects of payment incentives, hospital ownership and competition on hospitalization decisions for ambulatory surgical procedures.

OBJECTIVE: To test the hypotheses that (1) for-profit (FP) and not-for-profit (NFP) hospitals are less likely than public hospitals to admit cases reimbursed by prospective payment favoring ambulatory over inpatient care; (2) admission odds of public, FP and NFP hospitals will converge under increasing hospital competition. METHODS: Retrospective, population-based, cross-sectional study covering 29,699 cases of unilateral, femoral/inguinal hernia operation (major surgical procedure) and 60,626 cases of cataract surgery (local surgical procedure), from Taiwan's National Health Insurance database was used. Diagnosis-wise logistic regression analysis were done to examine associations between admission propensities of FP versus public and NFP hospitals (large teaching hospitals with > or = 250 beds versus district hospitals with < 250 beds) under high and low competition, adjusted for clinical complications, and patient as well as physician demographics. RESULTS: Large public teaching hospitals are significantly more likely than FP district hospitals to admit hernia patients (ORs = 1.9 and 2.6, respectively, under high and low competition), and cataract surgery patients (ORs = 5.0 and 5.4, respectively, under high and low competition). The corresponding odds ratios for public district hospitals (relative to FP district hospitals) are 1.2 and 3.9 for hernia and 4.9 and 2.7 for cataract surgery. Odds ratios show convergence of admission odds across hospital ownership under high competition relative to low competition for hernia (OR range for different hospital types under high competition, 1.0-1.9; and under low competition, 1.0-3.9). Cataract cases show high divergence of admission odds between public and FP/NFP hospitals regardless of competition level (OR range for different hospital types under high competition, 0.3-5.0; and under low competition, 0.3-5.4). CONCLUSION: Overall, our data support the study hypotheses. Differences in the relevance of inpatient care for hernia and cataract surgery may account for the lack of admission convergence of public hospitals and FPs under high competition among cataract surgery group.

Ambulatory Surgical Procedures↗

PubMed2005

WHOQOL-BREF as predictors of mortality: a two-year follow-up study at veteran homes.

The main purpose of this study was to evaluate the effectiveness of the brief version of the World Health Organization Quality of Life (WHOQOL-BREF) questionnaire as a predictor of mortality amongst the elderly. A total of 689 male residents of veteran homes, all above the age of 65 years, were randomly selected in 2001. The Taiwan version of the WHOQOL-BREF was administered as the baseline, with each of these subjects being interviewed and subsequently followed up for mortality until the end of 2003. Data on self-reported global health, life satisfaction, medical status, physical performance and health behavior was also collected. Following the death of 105 of the 689 subjects during the 2-year follow-up period, the relative risk (RR) of death was subsequently assessed using Cox's proportional hazard regression analyses. After adjusting for other predictors (age group, chronic diseases, emergency visits, hospitalization, physical performance, regular exercise, self-reported global health and life satisfaction), almost all of the WHOQOL-BREF items and domains failed to predict mortality; the one exception was working capacity levels (score 1-2 vs. score 4-5) which, after adjusting for other predictors, did demonstrate the ability to predict mortality (RR = 1.96, p < 0.05).

Aged↗

PubMed2005

Maternal age and the likelihood of a maternal request for cesarean delivery: a 5-year population-based study.

OBJECTIVE: The purpose of this study was to examine associations between maternal age and maternal request cesarean deliveries. STUDY DESIGN: Five-year population-based data from Taiwan (1997-2001) that covered 904,657 singleton deliveries without a clinical indication for cesarean delivery that were judged by the attending physician were subjected to multiple logistic regression, year-wise, to examine the association of maternal age with request cesarean delivery, adjusted for health care institutional characteristics. RESULTS: Request cesarean delivery rates steadily increased over the study period within each age group, disproportionately so among the 34+ age group. Women aged < 25 years were less likely than women aged 25 to 34 years (reference group) to request a cesarean delivery (odds ratio range, 0.67-0.88) and women aged 34+ were more likely than the reference group to have a request cesarean delivery (odds ratio range, 1.96-2.01), adjusted for health care institutional characteristics. CONCLUSION: Population-based data confirms the expectancy that request cesarean delivery propensity increases with maternal age.

Adult↗

PubMed2005

Length of stay and costs for asthma patients by hospital characteristics--a five-year population-based analysis.

This study sets out to explore the relationship between hospital characteristics, asthma length of stay (LOS), and costs per discharge. The study adopts hospitalization data from the Taiwan National Health Insurance Research Database covering the period from 1997 to 2001. Study subjects were identified from the database by principal diagnosis of asthma or asthmatic bronchitis, with a total of 139,630 cases being included in the study. Multiple-regression analyses were performed to explore the relationship between LOS, costs per discharge and hospital characteristics, adjusting for age, gender, and discharge status of patients, as well as complications or comorbidities. The regression analyses showed that, compared with district hospitals, medical centers and regional hospitals have longer and more statistically significant LOS, as well as higher costs. Hospitals operating on a for-profit basis have shorter LOS and lower costs than public and not-for-profit hospitals. This study shows the existence of wide variations in LOS and costs per discharge for asthma hospitalizations, between the various types of hospitals in Taiwan.

Academic Medical Centers↗

PubMed2004

Using a population-based database to explore the inter-specialty differences in physician practice incomes in Taiwan.

Gaining an understanding of the distribution of physician incomes between different medical specialties could assist policymakers to predict the future medical manpower supply. The purpose of this study is to examine the differences in medical specialty-specific gross practice incomes between office-based physicians in Taiwan. The primary data source for the study, which includes 7444 office-based physicians, was provided by the Taiwan Department of Health, with the dependent variable of interest to this study being the annual gross income of physician practices, whilst the independent variable is physician specialty. The study controlled for physicians' age, gender, specialty-board status, type of practice, location of clinic and urbanization level of the community in which the practice was located. Multivariate regression analyses were carried out to explore the relationship between physician specialty and gross practice income. This study finds a significant relationship between the annual gross income of physician practices and the physician's medical specialty (P < 0.001). Of all physicians, those specializing in rehabilitation and orthopedics had the highest gross practice incomes; conversely, obstetricians and gynecologists had the lowest gross practice incomes. The regression analyses demonstrated that after adjusting for socio-demographic and professional characteristics, gross practice incomes of physicians were significantly related to their medical specialty. This study concludes that differences in the gross practice incomes of physicians were significantly related to medical specialties. Those physicians specializing in procedure-based specialties, such as rehabilitation and orthopedics, had higher practice incomes than their counterparts in other more diagnosis-oriented specialties such as family practice and pediatrics.

Adult↗

PubMed2004

Association of hospital ownership with patient transfers to outpatient care under a prospective payment system in Taiwan.

Case payment, a prospective payment system akin to diagnosis-related groups (DRGs) has in-built incentives for hospitals to transfer inpatients to their own ambulatory care units following early discharge. This study used nation-wide inpatient claims data on a total of 100,730 patients treated in 2000 in (Taiwan): cesarean section (59,364 cases), femoral/inguinal hernia operation (18,675 cases), and hemorrhoidectomy (22,691 cases), all reimbursed by case payment, to explore the relationship between hospital ownership and patient transfers to outpatient treatment. For all three diagnoses, for-profit (FP) hospitals not only had lower lengths of stay (LOS) compared to public hospitals, but also showed very high odds of patient transfer to their own outpatient units, after controlling for institutional variables, (hospital level, teaching status, and geographic location), hospital competitive environment (the Herfindal-Hirschman index), and patient variables (gender, age, length of stay, and number of secondary diagnoses, a proxy for severity of illness). Similar, though slightly lower odds were observed with not-for-profit (NFP) hospitals relative to public hospitals. The findings support the property rights theory, suggesting that in Taiwan, institutional profit maximization motives may be driving patient transfers under the case payment diagnoses, rather than medical care needs. In NFP hospitals, their physician compensation mechanism, driven largely by care volumes provided by each physician, appears to be driving the disproportionately greater likelihood of patient transfer to outpatient care.

Adult↗

PubMed2004

Costs per discharge and hospital ownership under prospective payment and cost-based reimbursement systems in Taiwan.

This study in Taiwan examined the relationships between health care costs and hospital ownership under two financing systems with diametrically opposite incentives, case-payment (a form of prospective payment) and cost-based reimbursement. The universal sample of patients treated in 2000, for three standard care groups under each payment method, was included. The case payment diagnoses were uncomplicated cases of caesarean section, femoral/inguinal hernia operation and thyroidectomy, and the cost-based reimbursement diagnoses were uncomplicated cases of benign breast neoplasm, pneumococcal pneumonia and traumatic finger amputation. Costs per discharge were significantly lower in for-profit hospitals (by 2.8 to 5.7%) compared with public and not-for-profit hospitals for case payment diagnoses, which is consistent with the literature on US hospitals. For the cost-based reimbursement diagnoses, for-profits had 11.5 to 21.8% higher costs per discharge. The opposite direction of associations under the two payment systems validates the assumptions of the property rights theory in Taiwan's health care sector. Three plausible explanations for the study findings are suggested: (1). greater productive efficiency in private hospitals under case payment, (2). cost shifting from case payment diagnoses to cost-reimbursed diagnoses, and (3). patient dumping. Longitudinal studies using detailed hospital-level information with patient tracking facility are needed to clarify these issues.

Adult↗

PubMed2004

Patient perceptions of service quality in group versus solo practice clinics.

OBJECTIVE: To compare patient perceptions of service quality at solo and group practices, and to examine the association of perceptions with 'potential patient loyalty' (PPL), the potential for seeking future service from the same clinic. DESIGN: A self-administered, cross-sectional survey of clinic outpatients, using an adapted SERVQUAL questionnaire translated into Chinese, with additional items on overall satisfaction and intent to return/recommend the clinic to others. Sampling and study subjects. Every third outpatient at all newly started group practices (four) and solo clinics (thirteen) in Taiwan in the preceding 4-7 months, including 150 and 50 patients from each group and solo practice, respectively, for a total of 1250 patients. MAIN OUTCOME MEASURES: Perceived service quality on five dimensions-tangibles, reliability, responsiveness, assurance, and empathy-and PPL. All constructs were measured on a five-point scale. RESULTS: After accounting for random effects of clinical and geographical location, group practice patients perceived significantly higher service quality on all dimensions relative to solo practice patients, after adjusting for age, gender, education, and illness type. All service quality dimensions except assurance were significantly positively associated with PPL after adjusting for age, gender, education, and illness type, and random effects at the clinical and geographical location levels. CONCLUSIONS: Patients perceive better service quality at group practices compared with solo practices on all dimensions. Patients' quality perceptions are significant predictors of PPL. The implications for physician practices both internationally and in Taiwan are discussed, as well as policy implications for the Taiwan government.

Adolescent↗

PubMed2004

Institutional factors in cesarean delivery rates: policy and research implications.

OBJECTIVE: To examine the association of health care institutional characteristics with cesarean delivery. METHODS: Cross-sectional data from Taiwan's National Health Insurance database was used, covering all 270774 women admitted for singleton deliveries, in 2000. Bivariate and multiple logistic regression analyses were used. RESULTS: The overall cesarean rate was 32.3% of all deliveries. Obstetrics and gynecology clinics (with fewer than 10 beds) had a very high likelihood of cesarean delivery compared with all categories of hospitals (odds ratios 17-25), after adjusting for clinical complications and patient, physician, and institutional characteristics. The likelihood of cesarean delivery was similar across hospitals, regardless of level and ownership category. High cesarean propensity at clinics arose from higher cesarean rates in all complication categories, including "No complications." The overall hospital cesarean rate, 31.2%, is also higher than that in other developed countries with universal health care coverage. CONCLUSION: Taiwan has very high cesarean rates, with a particularly high propensity for this procedure at clinics. The cesarean delivery profile in the various clinical complication categories suggests a significantly lower clinical threshold triggering cesarean delivery decisions in Taiwan, especially at obstetrics and gynecology clinics. Countries currently having or contemplating large expansions in health insurance coverage should document obstetric practice profiles before initiating coverage expansions. There is also a need for well designed research on the medical and life-satisfaction impacts of cesarean compared with vaginal delivery to enable an informed policy stand on this issue.

Adolescent↗

PubMed2004

Association between maternal age and the likelihood of a cesarean section: a population-based multivariate logistic regression analysis.

BACKGROUND: A majority of studies examining the relationship between advancing maternal age and the likelihood of cesarean section (CS) use data from regional samples or from a limited number of medical institutions. This study uses population-based data from Taiwan to explore the relationship between maternal age and the likelihood of a CS. METHODS: The National Health Insurance Research Database (NHIRD) on registries of medical facilities and board-certified physicians and monthly claim summaries for inpatients were used. In total, 502 524 singleton deliveries were included in the study. Multivariate logistic regressions were performed with the presence of CS as the dependent variable and maternal age (<20, 20-29, 30-34 and >34 years) as the independent variable. The study controlled for maternal indications, institution characteristics, maternal requests and attending physician characteristics. RESULTS: CS rates for the age groups <20, 20-29, 30-34 and >34 years were 17.7, 27.4, 37.4 and 47.5%, respectively. The regression analyses consistently showed that the likelihood of a CS significantly increased with advancing maternal age within each category of complication after adjusting for medical institution characteristics and characteristics of the attending physician. CONCLUSIONS: This study found that, after adjusting for maternal indications, and healthcare institution and physician characteristics, there was a significant relationship between advancing maternal age and an increased likelihood of a CS. This finding, together with the high CS rate of 32.1% in Taiwan, one of the highest reported in the world today, highlights an imperative need to devise interventions to reduce the frequency of CSs.

Adult↗

PubMed2004

Cost convergence between public and for-profit hospitals under prospective payment and high competition in Taiwan.

OBJECTIVE: To test the hypotheses that: (1) average adjusted costs per discharge are higher in high-competition relative to low-competition markets, and (2) increased competition is associated with cost convergence between public and for-profit (FP) hospitals for case payment diagnoses, but not for cost-plus reimbursed diagnoses. DATA SOURCES: Taiwan's National Health Insurance database; 325,851 inpatient claims for cesarean section, vaginal delivery, prostatectomy, and thyroidectomy (all case payment), and bronchial asthma and cholelithiasis (both cost-based payment). STUDY DESIGN: Retrospective population-based, cross-sectional study. DATA ANALYSIS: Diagnosis-wise regression analyses were done to explore associations between cost per discharge and hospital ownership under high and low competition, adjusted for clinical severity and institutional characteristics. PRINCIPAL FINDINGS: Adjusted costs per discharge are higher for all diagnoses in high-competition markets. For case payment diagnoses, the magnitudes of adjusted cost differences between public and FP hospitals are lower under high competition relative to low competition. This is not so for the cost-based diagnoses. CONCLUSIONS: We find that the empirical evidence supports both our hypotheses.

Economic Competition↗