Yung-Hsiang Ying

Dr. Yung-Hsiang Ying

orcid

Research Focus & Metrics

Academic Career Length

14Years (2013-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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HCHan-Chih Cheng
Han-Chih Cheng
KCKoyin Chang
Koyin Chang
ESElizabeth P. Shen
Elizabeth P. Shen
KLKai-Shin Luo
Kai-Shin Luo
YYYung-Hsiang Ying
Yung-Hsiang Ying
Importance: Because of the high prevalence of myopia in Taiwan, understanding the risk factors for its development and progression is important to public health. Background: This study investigated the risk factors for myopia and their influence on the progression of myopia in schoolchildren in Taiwan. Design: Patients’ clinical records were obtained retrospectively from ophthalmologists. Questionnaires were given to collect demographic information, family background, hours spent on daily activities, myopia progression, and treatment methods. Participants: From a regional medical hospital in northern Taiwan, 522 schoolchildren with myopia participated in the study. Written informed consent was obtained from participants of legal age or the parents or legal guardians of younger children. Methods: Multivariable regression analyses were performed. Myopia measured in cycloplegic spherical equivalent (SE) was analysed, controlling for patients’ family and demographic information as well as their daily activity behaviours. Main Outcome Results: Children with high myopic parents were more myopic. Earlier onset age of myopia was associated with a higher level of myopia and greater annual myopic progression. Children reporting longer time usage of electronic devices had greater progression of myopia. Boys tended to be more myopic than girls. Lower levels of myopia were associated with more outdoor activities, and better vision care knowledge in children and parents. Conclusions and Relevance: In addition to genetics, education and environment can influence the development of myopia. Health policies for schoolchildren should promote protective activities and vision care knowledge at a young age, to protect the eyesight of schoolchildren.

1 February 2013 in Journal of Comparative Economics
Verified
Journal Article
Closed access
KCKoyin Chang
Koyin Chang
YKYoonbai Kim
Yoonbai Kim
MTMarc Tomljanovich
Marc Tomljanovich
YYYung-Hsiang Ying
Yung-Hsiang Ying

YYYung-Hsiang Ying
Yung-Hsiang Ying
CWChin-Chih Wu
Chin-Chih Wu
KCKoyin Chang
Koyin Chang
To understand the impact of drinking and driving laws on drinking and driving fatality rates, this study explored the different effects these laws have on areas with varying severity rates for drinking and driving. Unlike previous studies, this study employed quantile regression analysis. Empirical results showed that policies based on local conditions must be used to effectively reduce drinking and driving fatality rates; that is, different measures should be adopted to target the specific conditions in various regions. For areas with low fatality rates (low quantiles), people’s habits and attitudes toward alcohol should be emphasized instead of transportation safety laws because “preemptive regulations” are more effective. For areas with high fatality rates (or high quantiles), “ex-post regulations” are more effective, and impact these areas approximately 0.01% to 0.05% more than they do areas with low fatality rates.

1 August 2019 in Therapeutics and Clinical Risk Management
Verified
Journal Article
Open access
PDF file
GLGeorge Linn
George Linn
YYYung-Hsiang Ying
Yung-Hsiang Ying
KCKoyin Chang
Koyin Chang
Background: Babies are sometimes delivered by cesarean section (CS) to women eligible for trial of labor after a cesarean (TOLAC) due to a fear of complications during the delivery process. This view is especially widespread in Taiwan, as evidenced by the extremely low rate (<5%) of vaginal birth after cesarean section (VBAC). To improve the safety and quality of childbirth and the obstetrical practice environment, this study aimed to identify ways to contain the ever-increasing rate of CS by investigating the determinants for TOLAC from the viewpoint of obstetricians. Methods: A specially designed questionnaire was employed that incorporated the perceived risk of VBAC, institutional managerial attitude, and obstetricians’ personal characteristics. Face-to-face surveys were conducted with obstetricians from across Taiwan. Regression analysis was used as appropriate. Results: Among the 231 recruited obstetricians, 86.7% were willing to undertake VBAC, but only 71.4% had actually done so. Obstetricians with a more risk-tolerant personality were more likely to undertake VBAC. Institutional characteristics, such as the time it takes to transfer a woman from the delivery table to the operating table (table to table) and the general facilities of the hospital to handle delivery complications resulting from VBAC were also key determinants for attempting VBAC. Conclusion: In Taiwan, a country with a low birthrate, obstetricians need to be risk-tolerant to undertake VBAC. This phenomenon is probably due to underinvestment in facilities for vaginal delivery and thus a general perception that VBAC is risky. The study’s results will potentially help medical institutions to adopt appropriate guidelines and build incentive structures to achieve a higher VBAC rate.

YCYi-Ting Chen
Yi-Ting Chen
YYYung-Hsiang Ying
Yung-Hsiang Ying
KCKoyin Chang
Koyin Chang
YHYa-Hui Hsieh
Ya-Hui Hsieh
Objectives: Chronic Obstructive Pulmonary Disease (COPD) is one of the fastest growing causes of death worldwide. However, few studies, if any, have been conducted that have investigated patient profiles in Asia. This paper analyzes patient willingness to pay (WTP) as a function of patient disease severity, health-related quality of life (HRQL), and smoking behavior in Taiwan. Study Design: A cross-sectional survey was conducted using in-person interviews with COPD patients. A hypothetical scenario was designed and presented to ascertain each subject’s willingness to pay (WTP) for a cure for COPD. Methods: A survey of subjects with COPD was performed in Taiwan. The contingent valuation method (CVM) was employed to measure patient financial burden, which was analyzed along with covariates that included various types of health-related quality of life (HRQL), severity level, and demographic background. Multivariate regression and simulation methods were employed for analysis. Results: A total of 142 subjects were interviewed, with an average annual WTP of approximately $1422 USD (or 42,662.37 NTD, New Taiwan Dollars). The annual WTP for patients 55 years of age or younger, $5709.06, was the highest and equivalent to approximately one-third of Taiwan average annual personal income or quadruple the spending amount of the Taiwan National Bureau of Health Insurance (NBHI) for each COPD patient. Current cigarette smokers were willing to pay a substantially higher amount than former smokers and nonsmokers, which reflects a psychological desire for redemption in COPD patients. Conclusions: The results of this study provide directions for the relevant authorities regarding the alleviation of suffering as a result of COPD. Appropriate health promotion measures, such as measures to reduce tobacco usage, early diagnosis, and active treatment, may be necessary to contain the escalating costs related to COPD and to prevent this epidemic from worsening.

12 August 2019 in Journal of Clinical Medicine
Verified
Journal Article
Open access
PDF file
YYYung-Hsiang Ying
Yung-Hsiang Ying
GLGeorge Linn
George Linn
KCKoyin Chang
Koyin Chang
The rate of vaginal birth after cesarean section (VBAC) is extremely low in Taiwan probably due to the high perceived risk of trial of labor after a cesarean (TOLAC). To promote the benefits associated with vaginal birth, this study provides evidence to potentially assist relevant public authorities adopt appropriate guidelines or optimize health insurance reimbursement policies to achieve a higher VBAC rate. Employing the National Health Insurance (NHI) Claim Data, this study analyzes women’s adoptions of birth-giving methods for those who had previous cesarean section (CS) experiences. Empirical methods include logit, probit, and hierarchical regression models controlling women’s demographics, incentive indicators, as well as hospital and obstetrician characteristics. Taiwan continues to have a decreasing trend in VBAC rate even with an increase in NHI payment for vaginal birth delivery in 2005, which stimulated a surge in VBAC rate only temporarily. Factors that significantly influence women’s adoption of VBAC include institution-specific random effects, weekend admission, comorbidities during pregnancy, and income and fertility of women. Change in service payment from National Health Insurance (NHI) to healthcare providers constitutes an effective policy in directing clinical practices in the short term. Constant and systematic policy review should be undertaken to promote safe and beneficial medical practices. The results of the study suggest that women’s adoption of birth-giving method is dominated by non-medical considerations. Significant institution-specific effects imply that women might not be well-informed regarding their optimal birth-giving choice. Health education and training programs for hospital personnel should be kept up to date to better serve society.