1.Association of Age, Sex and Education With Access to the Intravenous Thrombolysis for Acute Ischemic Stroke
Yoona KO ; Beom Joon KIM ; Youngran KIM ; Jong-Moo PARK ; Kyusik KANG ; Jae Guk KIM ; Jae-Kwan CHA ; Tai Hwan PARK ; Kyungbok LEE ; Jun LEE ; Keun-Sik HONG ; Byung-Chul LEE ; Kyung-Ho YU ; Dong-Eog KIM ; Joon-Tae KIM ; Jay Chol CHOI ; Jee Hyun KWON ; Wook-Joo KIM ; Kyu Sun YUM ; Sung-Il SOHN ; Hyungjong PARK ; Sang-Hwa LEE ; Kwang-Yeol PARK ; Chi Kyung KIM ; Sung Hyuk HEO ; Moon-Ku HAN ; Anjail Z. SHARRIEF ; Sunil A. SHETH ; Hee-Joon BAE ;
Journal of Korean Medical Science 2025;40(13):e49-
		                        		
		                        			 Background:
		                        			Barriers to treatment with intravenous thrombolysis (IVT) for patients with acute ischemic stroke (AIS) in South Korea remain incompletely characterized. We analyze a nationwide prospective cohort to determine patient-level features associated with delayed presentation and non-treatment of potential IVT-eligible patients. 
		                        		
		                        			Methods:
		                        			We identified consecutive patients with AIS from 01/2011 to 08/2023 from a multicenter and prospective acute stroke registry in Korea. Patients were defined as IVT candidates if they presented within 4.5 hours from the last known well, had no lab evidence of coagulopathy, and had National Institute of Health Stroke Scale (NIHSS) ≥ 4. Multivariable generalized linear mixed regression models were used to investigate the associations between their characteristics and the IVT candidates or the use of IVT among the candidates. 
		                        		
		                        			Results:
		                        			Among 84,103 AIS patients, 41.0% were female, with a mean age of 69 ± 13 years and presentation NIHSS of 4 [interquartile range, 1–8]. Out of these patients, 13,757 (16.4%) were eligible for IVT, of whom 8,179 (59.5%) received IVT. Female sex (adjusted risk ratio [RR], 0.90; 95% confidence interval [CI], 0.86–0.94) and lower years of education (adjusted RR, 0.90; 95% CI, 0.84–0.97 for 0–3 years, compared to ≥ 13 years) were associated with a decreased likelihood of presenting as eligible for IVT after AIS; meanwhile, young age (adjusted RR, 1.12; 95% CI, 1.01–1.24 for ≤ 44 years, compared to 75–84 years) was associated with an increased likelihood of being an IVT candidate. Among those who were eligible for IVT, only age was significantly associated with the use of IVT (adjusted RR, 1.09; 95% CI, 1.03–1.16 for age 65–74 and adjusted RR, 0.83; 95% CI, 0.76–0.90 for ≥ 85 years, respectively). 
		                        		
		                        			Conclusion
		                        			Most patients with AIS present outside IVT eligibility in South Korea, and only 60% of eligible patients were ultimately treated. We identified increased age, female sex and lower education as key features on which to focus interventions for improving IVT utilization. 
		                        		
		                        		
		                        		
		                        	
2.Association of Age, Sex and Education With Access to the Intravenous Thrombolysis for Acute Ischemic Stroke
Yoona KO ; Beom Joon KIM ; Youngran KIM ; Jong-Moo PARK ; Kyusik KANG ; Jae Guk KIM ; Jae-Kwan CHA ; Tai Hwan PARK ; Kyungbok LEE ; Jun LEE ; Keun-Sik HONG ; Byung-Chul LEE ; Kyung-Ho YU ; Dong-Eog KIM ; Joon-Tae KIM ; Jay Chol CHOI ; Jee Hyun KWON ; Wook-Joo KIM ; Kyu Sun YUM ; Sung-Il SOHN ; Hyungjong PARK ; Sang-Hwa LEE ; Kwang-Yeol PARK ; Chi Kyung KIM ; Sung Hyuk HEO ; Moon-Ku HAN ; Anjail Z. SHARRIEF ; Sunil A. SHETH ; Hee-Joon BAE ;
Journal of Korean Medical Science 2025;40(13):e49-
		                        		
		                        			 Background:
		                        			Barriers to treatment with intravenous thrombolysis (IVT) for patients with acute ischemic stroke (AIS) in South Korea remain incompletely characterized. We analyze a nationwide prospective cohort to determine patient-level features associated with delayed presentation and non-treatment of potential IVT-eligible patients. 
		                        		
		                        			Methods:
		                        			We identified consecutive patients with AIS from 01/2011 to 08/2023 from a multicenter and prospective acute stroke registry in Korea. Patients were defined as IVT candidates if they presented within 4.5 hours from the last known well, had no lab evidence of coagulopathy, and had National Institute of Health Stroke Scale (NIHSS) ≥ 4. Multivariable generalized linear mixed regression models were used to investigate the associations between their characteristics and the IVT candidates or the use of IVT among the candidates. 
		                        		
		                        			Results:
		                        			Among 84,103 AIS patients, 41.0% were female, with a mean age of 69 ± 13 years and presentation NIHSS of 4 [interquartile range, 1–8]. Out of these patients, 13,757 (16.4%) were eligible for IVT, of whom 8,179 (59.5%) received IVT. Female sex (adjusted risk ratio [RR], 0.90; 95% confidence interval [CI], 0.86–0.94) and lower years of education (adjusted RR, 0.90; 95% CI, 0.84–0.97 for 0–3 years, compared to ≥ 13 years) were associated with a decreased likelihood of presenting as eligible for IVT after AIS; meanwhile, young age (adjusted RR, 1.12; 95% CI, 1.01–1.24 for ≤ 44 years, compared to 75–84 years) was associated with an increased likelihood of being an IVT candidate. Among those who were eligible for IVT, only age was significantly associated with the use of IVT (adjusted RR, 1.09; 95% CI, 1.03–1.16 for age 65–74 and adjusted RR, 0.83; 95% CI, 0.76–0.90 for ≥ 85 years, respectively). 
		                        		
		                        			Conclusion
		                        			Most patients with AIS present outside IVT eligibility in South Korea, and only 60% of eligible patients were ultimately treated. We identified increased age, female sex and lower education as key features on which to focus interventions for improving IVT utilization. 
		                        		
		                        		
		                        		
		                        	
3.Association of Age, Sex and Education With Access to the Intravenous Thrombolysis for Acute Ischemic Stroke
Yoona KO ; Beom Joon KIM ; Youngran KIM ; Jong-Moo PARK ; Kyusik KANG ; Jae Guk KIM ; Jae-Kwan CHA ; Tai Hwan PARK ; Kyungbok LEE ; Jun LEE ; Keun-Sik HONG ; Byung-Chul LEE ; Kyung-Ho YU ; Dong-Eog KIM ; Joon-Tae KIM ; Jay Chol CHOI ; Jee Hyun KWON ; Wook-Joo KIM ; Kyu Sun YUM ; Sung-Il SOHN ; Hyungjong PARK ; Sang-Hwa LEE ; Kwang-Yeol PARK ; Chi Kyung KIM ; Sung Hyuk HEO ; Moon-Ku HAN ; Anjail Z. SHARRIEF ; Sunil A. SHETH ; Hee-Joon BAE ;
Journal of Korean Medical Science 2025;40(13):e49-
		                        		
		                        			 Background:
		                        			Barriers to treatment with intravenous thrombolysis (IVT) for patients with acute ischemic stroke (AIS) in South Korea remain incompletely characterized. We analyze a nationwide prospective cohort to determine patient-level features associated with delayed presentation and non-treatment of potential IVT-eligible patients. 
		                        		
		                        			Methods:
		                        			We identified consecutive patients with AIS from 01/2011 to 08/2023 from a multicenter and prospective acute stroke registry in Korea. Patients were defined as IVT candidates if they presented within 4.5 hours from the last known well, had no lab evidence of coagulopathy, and had National Institute of Health Stroke Scale (NIHSS) ≥ 4. Multivariable generalized linear mixed regression models were used to investigate the associations between their characteristics and the IVT candidates or the use of IVT among the candidates. 
		                        		
		                        			Results:
		                        			Among 84,103 AIS patients, 41.0% were female, with a mean age of 69 ± 13 years and presentation NIHSS of 4 [interquartile range, 1–8]. Out of these patients, 13,757 (16.4%) were eligible for IVT, of whom 8,179 (59.5%) received IVT. Female sex (adjusted risk ratio [RR], 0.90; 95% confidence interval [CI], 0.86–0.94) and lower years of education (adjusted RR, 0.90; 95% CI, 0.84–0.97 for 0–3 years, compared to ≥ 13 years) were associated with a decreased likelihood of presenting as eligible for IVT after AIS; meanwhile, young age (adjusted RR, 1.12; 95% CI, 1.01–1.24 for ≤ 44 years, compared to 75–84 years) was associated with an increased likelihood of being an IVT candidate. Among those who were eligible for IVT, only age was significantly associated with the use of IVT (adjusted RR, 1.09; 95% CI, 1.03–1.16 for age 65–74 and adjusted RR, 0.83; 95% CI, 0.76–0.90 for ≥ 85 years, respectively). 
		                        		
		                        			Conclusion
		                        			Most patients with AIS present outside IVT eligibility in South Korea, and only 60% of eligible patients were ultimately treated. We identified increased age, female sex and lower education as key features on which to focus interventions for improving IVT utilization. 
		                        		
		                        		
		                        		
		                        	
4.Association of Age, Sex and Education With Access to the Intravenous Thrombolysis for Acute Ischemic Stroke
Yoona KO ; Beom Joon KIM ; Youngran KIM ; Jong-Moo PARK ; Kyusik KANG ; Jae Guk KIM ; Jae-Kwan CHA ; Tai Hwan PARK ; Kyungbok LEE ; Jun LEE ; Keun-Sik HONG ; Byung-Chul LEE ; Kyung-Ho YU ; Dong-Eog KIM ; Joon-Tae KIM ; Jay Chol CHOI ; Jee Hyun KWON ; Wook-Joo KIM ; Kyu Sun YUM ; Sung-Il SOHN ; Hyungjong PARK ; Sang-Hwa LEE ; Kwang-Yeol PARK ; Chi Kyung KIM ; Sung Hyuk HEO ; Moon-Ku HAN ; Anjail Z. SHARRIEF ; Sunil A. SHETH ; Hee-Joon BAE ;
Journal of Korean Medical Science 2025;40(13):e49-
		                        		
		                        			 Background:
		                        			Barriers to treatment with intravenous thrombolysis (IVT) for patients with acute ischemic stroke (AIS) in South Korea remain incompletely characterized. We analyze a nationwide prospective cohort to determine patient-level features associated with delayed presentation and non-treatment of potential IVT-eligible patients. 
		                        		
		                        			Methods:
		                        			We identified consecutive patients with AIS from 01/2011 to 08/2023 from a multicenter and prospective acute stroke registry in Korea. Patients were defined as IVT candidates if they presented within 4.5 hours from the last known well, had no lab evidence of coagulopathy, and had National Institute of Health Stroke Scale (NIHSS) ≥ 4. Multivariable generalized linear mixed regression models were used to investigate the associations between their characteristics and the IVT candidates or the use of IVT among the candidates. 
		                        		
		                        			Results:
		                        			Among 84,103 AIS patients, 41.0% were female, with a mean age of 69 ± 13 years and presentation NIHSS of 4 [interquartile range, 1–8]. Out of these patients, 13,757 (16.4%) were eligible for IVT, of whom 8,179 (59.5%) received IVT. Female sex (adjusted risk ratio [RR], 0.90; 95% confidence interval [CI], 0.86–0.94) and lower years of education (adjusted RR, 0.90; 95% CI, 0.84–0.97 for 0–3 years, compared to ≥ 13 years) were associated with a decreased likelihood of presenting as eligible for IVT after AIS; meanwhile, young age (adjusted RR, 1.12; 95% CI, 1.01–1.24 for ≤ 44 years, compared to 75–84 years) was associated with an increased likelihood of being an IVT candidate. Among those who were eligible for IVT, only age was significantly associated with the use of IVT (adjusted RR, 1.09; 95% CI, 1.03–1.16 for age 65–74 and adjusted RR, 0.83; 95% CI, 0.76–0.90 for ≥ 85 years, respectively). 
		                        		
		                        			Conclusion
		                        			Most patients with AIS present outside IVT eligibility in South Korea, and only 60% of eligible patients were ultimately treated. We identified increased age, female sex and lower education as key features on which to focus interventions for improving IVT utilization. 
		                        		
		                        		
		                        		
		                        	
5.Improving clinical reasoning competency and communication skills using virtual simulation-based learning focused on a pathophysiological approach in Korea: a quasi-experimental study
Journal of Korean Biological Nursing Science 2024;26(4):363-372
		                        		
		                        			
		                        			 Clinical reasoning, which is based on an understanding of the pathophysiological mechanisms of diseases, is a core nursing competency that involves analyzing patient-related data and providing appropriate nursing practices. Simulation-based education is effective in improving clinical reasoning competencies and communication skills. This study evaluated the effectiveness of virtual simulation-based learning in improving the communication skills and clinical reasoning competencies of undergraduate nursing students. Methods: This study used a single-group pretest and posttest quasi-experimental design to evaluate the effectiveness of virtual simulation-based learning. Data were collected from June to September 2020. Thirty-six nursing students in their third and fourth years of study who understood the purpose of this study were selected as participants. The collected data were analyzed using SPSS Statistics 25.0 and Winsteps 3.68.2. Results: The communication skills (t = −12.80, p < .001) and clinical reasoning competency (t = −4.67, p < .001) of the undergraduate nursing students who participated in the virtual simulation-based learning program improved significantly after participation. Additionally, a Rasch model analysis revealed that the overall clinical reasoning competency of undergraduate nursing students improved. Conclusion: Virtual simulation-based learning programs for nursing students should be developed and implemented. 
		                        		
		                        		
		                        		
		                        	
6.Improving clinical reasoning competency and communication skills using virtual simulation-based learning focused on a pathophysiological approach in Korea: a quasi-experimental study
Journal of Korean Biological Nursing Science 2024;26(4):363-372
		                        		
		                        			
		                        			 Clinical reasoning, which is based on an understanding of the pathophysiological mechanisms of diseases, is a core nursing competency that involves analyzing patient-related data and providing appropriate nursing practices. Simulation-based education is effective in improving clinical reasoning competencies and communication skills. This study evaluated the effectiveness of virtual simulation-based learning in improving the communication skills and clinical reasoning competencies of undergraduate nursing students. Methods: This study used a single-group pretest and posttest quasi-experimental design to evaluate the effectiveness of virtual simulation-based learning. Data were collected from June to September 2020. Thirty-six nursing students in their third and fourth years of study who understood the purpose of this study were selected as participants. The collected data were analyzed using SPSS Statistics 25.0 and Winsteps 3.68.2. Results: The communication skills (t = −12.80, p < .001) and clinical reasoning competency (t = −4.67, p < .001) of the undergraduate nursing students who participated in the virtual simulation-based learning program improved significantly after participation. Additionally, a Rasch model analysis revealed that the overall clinical reasoning competency of undergraduate nursing students improved. Conclusion: Virtual simulation-based learning programs for nursing students should be developed and implemented. 
		                        		
		                        		
		                        		
		                        	
7.Improving clinical reasoning competency and communication skills using virtual simulation-based learning focused on a pathophysiological approach in Korea: a quasi-experimental study
Journal of Korean Biological Nursing Science 2024;26(4):363-372
		                        		
		                        			
		                        			 Clinical reasoning, which is based on an understanding of the pathophysiological mechanisms of diseases, is a core nursing competency that involves analyzing patient-related data and providing appropriate nursing practices. Simulation-based education is effective in improving clinical reasoning competencies and communication skills. This study evaluated the effectiveness of virtual simulation-based learning in improving the communication skills and clinical reasoning competencies of undergraduate nursing students. Methods: This study used a single-group pretest and posttest quasi-experimental design to evaluate the effectiveness of virtual simulation-based learning. Data were collected from June to September 2020. Thirty-six nursing students in their third and fourth years of study who understood the purpose of this study were selected as participants. The collected data were analyzed using SPSS Statistics 25.0 and Winsteps 3.68.2. Results: The communication skills (t = −12.80, p < .001) and clinical reasoning competency (t = −4.67, p < .001) of the undergraduate nursing students who participated in the virtual simulation-based learning program improved significantly after participation. Additionally, a Rasch model analysis revealed that the overall clinical reasoning competency of undergraduate nursing students improved. Conclusion: Virtual simulation-based learning programs for nursing students should be developed and implemented. 
		                        		
		                        		
		                        		
		                        	
8.Improving clinical reasoning competency and communication skills using virtual simulation-based learning focused on a pathophysiological approach in Korea: a quasi-experimental study
Journal of Korean Biological Nursing Science 2024;26(4):363-372
		                        		
		                        			
		                        			 Clinical reasoning, which is based on an understanding of the pathophysiological mechanisms of diseases, is a core nursing competency that involves analyzing patient-related data and providing appropriate nursing practices. Simulation-based education is effective in improving clinical reasoning competencies and communication skills. This study evaluated the effectiveness of virtual simulation-based learning in improving the communication skills and clinical reasoning competencies of undergraduate nursing students. Methods: This study used a single-group pretest and posttest quasi-experimental design to evaluate the effectiveness of virtual simulation-based learning. Data were collected from June to September 2020. Thirty-six nursing students in their third and fourth years of study who understood the purpose of this study were selected as participants. The collected data were analyzed using SPSS Statistics 25.0 and Winsteps 3.68.2. Results: The communication skills (t = −12.80, p < .001) and clinical reasoning competency (t = −4.67, p < .001) of the undergraduate nursing students who participated in the virtual simulation-based learning program improved significantly after participation. Additionally, a Rasch model analysis revealed that the overall clinical reasoning competency of undergraduate nursing students improved. Conclusion: Virtual simulation-based learning programs for nursing students should be developed and implemented. 
		                        		
		                        		
		                        		
		                        	
9.Opuntia humifusa stems rich in quercetin and isorhamnetin alleviate insulin resistance in high-fat diet-fed rats
Young-Min LEE ; Yeonjeong CHOI ; Eunseo KIM ; In-Guk HWANG ; Yoona KIM
Nutrition Research and Practice 2024;18(4):498-510
		                        		
		                        			 BACKGROUND/OBJECTIVES:
		                        			Obesity, characterized by abnormal fat accumulation and metabolic disturbances, presents a significant health challenge. Opuntia humifusa Raf., commonly known as Korean Cheonnyuncho, is rich in various beneficial compounds and has demonstrated antioxidant and anti-inflammatory effects. However, its potential impact on glucose and lipid metabolism, particularly in obese rats, remains unexplored. We aimed to investigate whether O. humifusa stems and fruits could beneficially alter glucose metabolism and lipid profiles in a rat model of high-fat diet (HFD)-induced obesity.MATERIALS/METHODS: Thirty-two rats were allocated into 4 groups: normal diet (NF), HFD control (HF), HFD treated with 2% O. humifusa stems (HF-OS), and HFD treated with 2% O. humifusa fruits (HF-OF). Experimental diets were administered for 6 weeks. At the end of the treatment, liver and fat tissues were isolated, and serum was collected for biochemical analysis. The major flavonoid from O. humifusa stems and fruits was identified and quantified. 
		                        		
		                        			RESULTS:
		                        			After 6 weeks of treatment, the serum fasting glucose concentration in the HF-OS group was significantly lower than that in the HF group. Serum fasting insulin concentrations in both HF-OS and HF-OF groups tended to be lower than those in the HF group, indicating a significant improvement in insulin sensitivity in the HF-OS group. Additionally, the HF-OS group exhibited a tendency towards the restoration of adiponectin levels to that of the NF group. 
		                        		
		                        			CONCLUSION
		                        			The 2% O. humifusa stems contain abundant quercetin and isorhamnetin, which alter fasting blood glucose levels in rats fed a HFD, leading to a favorable improvement in insulin resistance. 
		                        		
		                        		
		                        		
		                        	
            
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