YungTai Chen

Dr. YungTai Chen


Research Focus & Metrics

Academic Career Length

15Years (2012-Present)

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

Representative Publications

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15 July 2016 in American Journal of Respiratory and Critical Care Medicine
Verified
Journal Article
Closed access
SOShuo-Ming Ou
Shuo-Ming Ou
HCHsi Chu
Hsi Chu
PCPei-Wen Chao
Pei-Wen Chao
YLYi-Jung Lee
Yi-Jung Lee
SKShu-Chen Kuo
Shu-Chen Kuo
YCYungTai Chen
YungTai Chen
Rationale: Patients with sepsis who survive to hospital discharge may present with ongoing high morbidity and mortality. However, little is known about the risk of long-term, all-cause mortality and cardiovascular outcomes after sepsis. Objectives: Our study aimed to investigate the long-term clinical outcomes in sepsis survivors. Methods: In this nationwide population-based study, data from patients with sepsis were retrieved from Taiwan’s National Health Insurance Research Database between 2000 and 2002. Each sepsis survivor was 1:1 propensity-matched to control subjects from two different control populations: subjects who were in the general population and subjects who were hospitalized for a nonsepsis diagnosis. The primary outcomes were all-cause mortality, major adverse cardiovascular events, myocardial infarction, heart failure, stroke, and sudden cardiac death or ventricular arrhythmia. Measurements and Main Results: Compared with matched population control subjects, sepsis survivors had higher risks of all-cause mortality (hazard ratio [HR], 2.18; 95% confidence interval [CI], 2.14–2.22), major adverse cardiovascular events (HR, 1.37; 95% CI, 1.34–1.41), ischemic stroke (HR, 1.27; 95% CI, 1.23–1.32), hemorrhagic stroke (HR, 1.36; 95% CI, 1.26–1.46), myocardial infarction (HR, 1.22; 95% CI, 1.14–1.30), heart failure (HR, 1.48; 95% CI, 1.43–1.53), and sudden cardiac death or ventricular arrhythmia (HR, 1.65; 95% CI, 1.57–1.74). Similar results, although slightly attenuated risks, were found when comparisons were made with hospitalized control subjects without sepsis. Conclusions: These data indicate that sepsis survivors had substantially increased risks of subsequent all-cause mortality and major adverse cardiovascular events at 1 year after discharge, which persisted for up to 5 years after discharge.

3 November 2015 in Annals of Internal Medicine
Verified
Journal Article
Closed access
PDF file
SOShuo-Ming Ou
Shuo-Ming Ou
CSChia-Jen Shih
Chia-Jen Shih
PCPei-Wen Chao
Pei-Wen Chao
HCHsi Chu
Hsi Chu
SKShu-Chen Kuo
Shu-Chen Kuo
YCYungTai Chen
YungTai Chen
Recent studies concluded that dipeptidyl peptidase-4 (DPP-4) inhibitors provide glycemic control but also raised concerns about the risk for heart failure in patients with type 2 diabetes mellitus (T2DM). However, large-scale studies of the effects on cardiovascular outcomes of adding DPP-4 inhibitors versus sulfonylureas to metformin therapy remain scarce. To compare clinical outcomes of adding DPP-4 inhibitors versus sulfonylureas to metformin therapy in patients with T2DM. Nationwide study using Taiwan's National Health Insurance Research Database. Taiwan. All patients with T2DM aged 20 years or older between 2009 and 2012. A total of 10,089 propensity score-matched pairs of DPP-4 inhibitor users and sulfonylurea users were examined. Cox models with exposure to sulfonylureas and DPP-4 inhibitors included as time-varying covariates were used to compare outcomes. The following outcomes were considered: all-cause mortality, major adverse cardiovascular events (MACEs) (including ischemic stroke and myocardial infarction), hospitalization for heart failure, and hypoglycemia. Patients were followed until death or 31 December 2013. DPP-4 inhibitors were associated with lower risks for all-cause death (hazard ratio [HR], 0.63 [95% CI, 0.55 to 0.72]), MACEs (HR, 0.68 [CI, 0.55 to 0.83]), ischemic stroke (HR, 0.64 [CI, 0.51 to 0.81]), and hypoglycemia (HR, 0.43 [CI, 0.33 to 0.56]) compared with sulfonylureas as add-on therapy to metformin but had no effect on risks for myocardial infarction and hospitalization for heart failure. Observational study design. Compared with sulfonylureas, DPP-4 inhibitors were associated with lower risks for all-cause death, MACEs, ischemic stroke, and hypoglycemia when used as add-ons to metformin therapy. None.

4 November 2014 in Circulation
Verified
Journal Article
Closed access
CSChia-Jen Shih
Chia-Jen Shih
HCHsi Chu
Hsi Chu
PCPei-Wen Chao
Pei-Wen Chao
YLYi-Jung Lee
Yi-Jung Lee
SKShu-Chen Kuo
Shu-Chen Kuo
YCYungTai Chen
YungTai Chen
Background—: Substantial infective endocarditis (IE)–related morbidity and mortality may occur even after successful treatment. However, no previous study has explored long-term hard end points (ie, stroke, myocardial infarction, heart failure, cardiovascular death) in addition to all-cause mortality in IE survivors. Methods and Results—: A nationwide population-based cohort study was conducted among IE survivors identified with the use of the Taiwan National Health Insurance Research Database during 2000 to 2009. IE survivors were defined as those who survived after discharge from first hospitalization with a diagnosis of IE. A total of 10 116 IE survivors were identified. IE survivors were matched to control subjects without IE at a 1:1 ratio through the use of propensity scores. The primary outcomes were stroke, myocardial infarction, readmission for heart failure, and sudden cardiac death or ventricular arrhythmia. The secondary outcomes were repeat IE and all-cause mortality. Compared with the matched cohort, IE survivors had higher risks of ischemic stroke (adjusted hazard ratio [aHR], 1.59; 95% confidence interval [CI], 1.40–1.80), hemorrhagic stroke (aHR, 2.37; 95% CI, 1.90–2.96), myocardial infarction (aHR, 1.44; 95% CI, 1.17–1.79), readmission for heart failure (aHR, 2.24; 95% CI, 2.05–2.43), sudden death or ventricular arrhythmia (aHR, 1.69; 95% CI, 1.44–1.98), and all-cause death (aHR, 2.27; 95% CI, 2.14–2.40). Risk factors for repeat IE were older age, male sex, drug abuse, and valvular replacement after an initial episode of IE. Conclusion—: Despite treatment, the risk of long-term major adverse cardiac events was substantially increased in IE survivors.

1 April 2015 in Intensive Care Medicine
Verified
Journal Article
Closed access
PDF file
MTMin-Juei Tsai
Min-Juei Tsai
SOShuo-Ming Ou
Shuo-Ming Ou
CSChia-Jen Shih
Chia-Jen Shih
PCPei-Wen Chao
Pei-Wen Chao
LWLan-Fu Wang
Lan-Fu Wang
YCYungTai Chen
YungTai Chen

1 September 2016 in Cardiovascular Diabetology
Verified
Journal Article
Open access
PDF file
CHChien-Yi Hsu
Chien-Yi Hsu
YSYu-Wen Su
Yu-Wen Su
YCYungTai Chen
YungTai Chen
STShih-Hung Tsai
Shih-Hung Tsai
CCChun Chin Chang
Chun Chin Chang
SLShing-Jong Lin
Shing-Jong Lin
Pleiotropic effects on cardiovascular protection have been suggested in several oral antidiabetic drugs (OAD). The impacts of OADs on aortic aneurysm (AA) growth have been found in animal studies, but the evidence of their beneficial effects for AA protection in human are lacking. We investigated the relationship between OAD therapy and the risk of developing AA. We conducted a nested case–control analysis using the database extracted from Taiwan’s National Health Insurance Research Database. The database consists of 1.2 million diabetic patients representing the majority of the type 2 diabetes population in Taiwan from 2000 to 2013. Cases were identified as those with either inpatient or outpatient diagnosis code of AA. One control was selected for each case matching on duration of follow-up, age, sex, urbanization, monthly income, severity of diabetes, and risk factor for AA. We identified variable classes of OADs, including metformin, sulfonylureas, thiazolidinedione (TZD), alpha-glucosidase inhibitors, meglitinide, dipeptidyl peptidase-4 (DPP-4) inhibitors prior to the development of AA. A total of 4468 cases diagnosed with AA and 4468 matched controls were identified. Metformin use, sulfonylurea use, and TZD were associated with lower risk of developing AA, odds ratio [OR] 0.72 (95 % confidence interval [CI] 0.64–0.80), 0.82 (95 % CI 0.74–0.92), and 0.82 (95 % CI 0.69–0.98), respectively. The effects of metformin and sulfonylurea on AA were dose responsive. Neither alpha-glucosidase inhibitors (OR 0.95; 95 % CI 0.81–1.11) nor DPP-4 inhibitors (OR 0.85; 95 % CI 0.68–1.07) was significantly associated with AA events. Metformin, sulfonylurea, and TZD treated patients were associated with lower risks of AA development, but not DPP-4 inhibitors or alpha-glucosidase inhibitor. The protective effects of hypoglycemic agents are further confirmed by the dose responsive relations in metformin and sulfonylurea groups.

19 January 2016 in Circulation
Verified
Journal Article
Closed access
PDF file
CSChia-Jen Shih
Chia-Jen Shih
SOShuo-Ming Ou
Shuo-Ming Ou
PCPei-Wen Chao
Pei-Wen Chao
SKShu-Chen Kuo
Shu-Chen Kuo
YLYi-Jung Lee
Yi-Jung Lee
YCYungTai Chen
YungTai Chen
Background—: Whether oral anticoagulant use should be considered in patients undergoing hemodialysis with atrial fibrillation (AF) remains controversial because of the uncertainty regarding risk-benefit assessments. The purpose of this study was to investigate the risk of ischemic stroke in patients undergoing hemodialysis with new-onset AF, in comparison with those without arrhythmia. Methods and Results—: This nationwide, population-based, propensity score–matched cohort study used data from Taiwan’s National Health Insurance Research Database during 1998 to 2011 for patients on hemodialysis with new-onset nonvalvular AF and matched subjects without arrhythmia. The clinical end points were ischemic stroke (fatal or nonfatal), all-cause death, and other serious adverse cardiovascular events. In comparison with the matched cohort, patients with AF (n=6772) had higher risks of ischemic stroke (adjusted hazard ratio [aHR], 1.27; 95% confidence interval [CI], 1.13–1.43), all-cause death (aHR, 1.59; 95% CI, 1.52–1.67), in-hospital cardiovascular death (aHR, 1.83; 95% CI, 1.71–1.94), myocardial infarction (aHR, 1.33; 95% CI, 1.17–1.51), and hospitalization for heart failure (aHR, 1.90; 95% CI, 1.76–2.05). After considering in-hospital death as a competing risk, AF significantly increased the risk of heart failure (HR, 1.56; 95% CI, 1.45–1.68), but not those of ischemic stroke and myocardial infarction. Additionally, the predictive value of the CHA 2 DS 2 –VASc score for ischemic stroke was diminished in the competing-risk model. Conclusions—: The risk of stroke was only modestly higher in patients undergoing hemodialysis with new-onset AF than in those without AF, and it became insignificant when accounting for the competing risk of in-hospital death.