205 results on '"Won-Joo Kim"'
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2. Author Correction: Changes in heart rate variability over time from symptom onset of transient global amnesia
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Soomi Cho, Sue Hyun Lee, Hye Jeong Lee, Min Kyung Chu, Won‑Joo Kim, Kyoung Heo, and Kyung Min Kim
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Medicine ,Science - Published
- 2024
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3. Development and validation of an artificial intelligence model for the early classification of the aetiology of meningitis and encephalitis: a retrospective observational studyResearch in context
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Bo Kyu Choi, Young Jo Choi, MinDong Sung, WooSeok Ha, Min Kyung Chu, Won-Joo Kim, Kyoung Heo, Kyung Min Kim, and Yu Rang Park
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Meningitis ,Autoimmune encephalitis ,Tuberculosis ,Neuroinflammation ,Artificial intelligence ,Medicine (General) ,R5-920 - Abstract
Summary: Background: Early diagnosis and appropriate treatment are essential in meningitis and encephalitis management. We aimed to implement and verify an artificial intelligence (AI) model for early aetiological determination of patients with encephalitis and meningitis, and identify important variables in the classification process. Methods: In this retrospective observational study, patients older than 18 years old with meningitis or encephalitis at two centres in South Korea were enrolled for development (n = 283) and external validation (n = 220) of AI models, respectively. Their clinical variables within 24 h after admission were used for the multi-classification of four aetiologies including autoimmunity, bacteria, virus, and tuberculosis. The aetiology was determined based on the laboratory test results of cerebrospinal fluid conducted during hospitalization. Model performance was assessed using classification metrics, including the area under the receiver operating characteristic curve (AUROC), recall, precision, accuracy, and F1 score. Comparisons were performed between the AI model and three clinicians with varying neurology experience. Several techniques (eg, Shapley values, F score, permutation feature importance, and local interpretable model-agnostic explanations weights) were used for the explainability of the AI model. Findings: Between January 1, 2006, and June 30, 2021, 283 patients were enrolled in the training/test dataset. An ensemble model with extreme gradient boosting and TabNet showed the best performance among the eight AI models with various settings in the external validation dataset (n = 220); accuracy, 0.8909; precision, 0.8987; recall, 0.8909; F1 score, 0.8948; AUROC, 0.9163. The AI model outperformed all clinicians who achieved a maximum F1 score of 0.7582, by demonstrating a performance of F1 score greater than 0.9264. Interpretation: This is the first multiclass classification study for the early determination of the aetiology of meningitis and encephalitis based on the initial 24-h data using an AI model, which showed high performance metrics. Future studies can improve upon this model by securing and inputting time-series variables and setting various features about patients, and including a survival analysis for prognosis prediction. Funding: MD-PhD/Medical Scientist Training Program through the Korea Health Industry Development Institute, funded by the Ministry of Health & Welfare, Republic of Korea.
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- 2023
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4. Sleep state of the elderly population in Korea: Nationwide cross-sectional population-based study
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Heewon Hwang, Kyung Min Kim, Chang-Ho Yun, Kwang Ik Yang, Min Kyung Chu, and Won-Joo Kim
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sleep ,aging ,sleep qualities ,daytime sleepiness ,insomnia ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
ObjectiveInterest in sleep disorders among the elderly, especially those in Korea, has increased. We aimed to describe the overall sleep status of the elderly population in Korea using survey data and to determine the risk factors concerning different aspects of sleep status.MethodsWe conducted a cross-sectional survey on 271 respondents aged 65–86 years old. We performed multistage clustered random sampling according to the population and socioeconomic distribution of all Korean territories. The survey questionnaire was used to perform a structural assessment of sociodemographic characteristics; medical comorbidities; psychiatric comorbidities; and sleep status, including sleep duration, sleep quality, presence of insomnia, excessive daytime sleepiness, sleep apnea, and restless legs syndrome.ResultsApproximately 12.5, 22.%, and 51.3% of the elderly population had poor sleep quality, excessive daytime sleepiness, and insomnia, respectively. Hypertension, dyslipidemia, insomnia, anxiety, and depression predicted poor sleep quality. Female sex, insomnia, and sleep apnea predicted excessive daytime sleepiness. Poor sleep quality and depression predicted insomnia.ConclusionA substantial proportion of the elderly Korean population have sleep problems, including poor sleep quality, excessive daytime sleepiness, and insomnia. Sleep status is influenced by various factors, including age, sex, and metabolic and psychiatric comorbidities.
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- 2023
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5. Impact of Insomnia Symptoms on the Clinical Presentation of Depressive Symptoms: A Cross-Sectional Population Study
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Yun Ho Choi, Kwang Ik Yang, Chang-Ho Yun, Won-Joo Kim, Kyoung Heo, and Min Kyung Chu
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insomnia ,depression ,clinical presentation ,prevalence ,epidemiology ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Objective: Insomnia and depression are prevalent disorders that often co-occur. This study aimed to investigate the impact of clinically significant insomnia symptoms on the prevalence and clinical presentation of clinically significant depressive symptoms and vice versa.Methods: This study used data from the Korean Headache-Sleep Study (KHSS), a nationwide cross-sectional population-based survey regarding headache and sleep. Clinically significant insomnia symptoms were defined as Insomnia Severity Index (ISI) scores ≥ 10 and clinically significant depressive symptoms were defined as Patient Health Questionnaire-9 (PHQ-9) scores ≥ 10, respectively. We referred clinically significant insomnia symptoms and clinically significant depressive symptoms as insomnia symptoms and depressive symptoms, respectively.Results: Of 2,695 participants, 290 (10.8%) and 116 (4.3%) were classified as having insomnia and depressive symptoms, respectively. The prevalence of depressive symptoms was higher among participants with insomnia symptoms than in those without insomnia symptoms (25.9 vs. 1.7%, respectively, P < 0.001). Among participants with depressive symptoms, the PHQ-9 scores were not significantly different between participants with and without insomnia symptoms (P = 0.124). The prevalence of insomnia symptoms was significantly higher among participants with depressive symptoms than in those without depressive symptoms (64.7 vs. 8.3%, respectively, P < 0.001). The ISI scores were significantly higher among participants with insomnia and depressive symptoms than in participants with insomnia symptoms alone (P < 0.001).Conclusions: Participants with depressive symptoms had a higher risk of insomnia symptoms than did those without depressive symptoms. The severity of depressive symptoms did not significantly differ based on insomnia symptoms among participants with depressive symptoms; however, the severity of insomnia symptoms was significantly higher in participants with depressive symptoms than in those without depressive symptoms.
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- 2021
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6. Status epilepticus due to cerebral air embolism after the Valsalva maneuver
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Hyun Ji Lyou, Hye Jeong Lee, Grace Yoojin Lee, and Won-Joo Kim
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Status epilepticus ,Embolism, air ,Pneumothorax ,Valsalva maneuver ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Background Cerebral air embolism is uncommon but potentially causes catastrophic events such as cardiac damage or even death. However, due to a low overall incidence, it may go undiagnosed. Case Report A 56-year-old man with a medical history of right upper lobectomy due to lung cancer showed changes in mental status after the Valsalva maneuver, followed by status epilepticus during admission. Brain and chest computed tomography showed cerebral air embolism and accidental pneumothorax in the right major fissure. After antiepileptic drug infusion and oxygen therapy, he recovered completely. Conclusion Since cerebral air embolism may result in fatal outcomes, it should be suspected in patients with sudden neurological deterioration after routine medical procedures.
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- 2019
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7. Gender differences influence over insomnia in Korean population: A cross-sectional study.
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Yun Kyung La, Yun Ho Choi, Min Kyung Chu, Jung Mo Nam, Young-Chul Choi, and Won-Joo Kim
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Medicine ,Science - Abstract
STUDY OBJECTIVES:Insomnia is the most common sleep disorder with significant psychiatric/physical comorbidities in the general population. The aim of this study is to investigate whether socioeconomic and demographic factors are associated with gender differences in insomnia and subtypes in Korean population. METHOD:The present study used data from the nationwide, cross-sectional study on sleep among all Koreans aged 19 to 69 years. The Insomnia Severity Index (ISI) was used to classify insomnia symptoms and their subtypes (cutoff value: 9.5). The Pittsburgh Sleep Quality Index (PSQI), Goldberg Anxiety Scale (GAS) and Patient Health Questionnaire-9 (PHQ-9) were used to measure sleep quality, anxiety and depression. RESULTS:A total of 2695 participants completed the survey. The overall prevalence of insomnia symptoms was 10.7%, including difficulty in initiating sleep (DIS) (6.8%), difficulty in maintaining sleep (DMS) (6.5%) and early morning awakening (EMA) (6.5%), and these symptoms were more prevalent in women than in men. Multivariate analysis showed that female gender, shorter sleep time and psychiatric complications were found to be independent predictors for insomnia symptoms and subtypes. After adjusting for covariates among these factors, female gender remained a significant risk factor for insomnia symptoms and their subtypes. As for men, low income was related to insomnia. CONCLUSION:Approximately one-tenth of the sample from the Korean general population had insomnia symptoms. The prevalence of insomnia symptom and the subtypes were more prevalent in women than men. Gender is an independent factor for insomnia symptoms.
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- 2020
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8. Impact of migraine on the clinical presentation of insomnia: a population-based study
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Jiyoung Kim, Soo-Jin Cho, Won-Joo Kim, Kwang Ik Yang, Chang-Ho Yun, and Min Kyung Chu
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Clinical presentation ,Headache ,Insomnia ,Insomnia symptom ,Migraine ,Medicine - Abstract
Abstract Background Insomnia and migraine are closely related; insomnia aggravates migraine symptoms. This study was conducted to investigate the impact of migraine on the clinical presentation of insomnia symptoms. Methods The data of the Korean Headache-Sleep Study (KHSS) were used in the present study. The KHSS is a nation-wide cross-sectional population-based survey regarding headache and sleep in Korean adults aged 19 to 69 years. If a participant’s Insomnia Severity Index (ISI) score ≥ 10, she/he was classified as having insomnia. The clinical presentation of insomnia symptoms was assessed using total and subcomponent scores of the ISI. Results Of 2695 participants, 290 (10.8%) and 143 (5.3%) individuals were assigned as having insomnia and migraine, respectively. The proportions of migraine (12.8% vs. 4.4%, p
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- 2018
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9. Genetic characteristics of non-familial epilepsy
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Kyung Wook Kang, Wonkuk Kim, Yong Won Cho, Sang Kun Lee, Ki-Young Jung, Wonchul Shin, Dong Wook Kim, Won-Joo Kim, Hyang Woon Lee, Woojun Kim, Keuntae Kim, So-Hyun Lee, Seok-Yong Choi, and Myeong-Kyu Kim
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Non-familial epilepsy ,Genetics ,Whole exome sequencing ,in silico analysis ,Medicine ,Biology (General) ,QH301-705.5 - Abstract
Background Knowledge of the genetic etiology of epilepsy can provide essential prognostic information and influence decisions regarding treatment and management, leading us into the era of precision medicine. However, the genetic basis underlying epileptogenesis or epilepsy pharmacoresistance is not well-understood, particularly in non-familial epilepsies with heterogeneous phenotypes that last until or start in adulthood. Methods We sought to determine the contribution of known epilepsy-associated genes (EAGs) to the causation of non-familial epilepsies with heterogeneous phenotypes and to the genetic basis underlying epilepsy pharmacoresistance. We performed a multi-center study for whole exome sequencing-based screening of 178 selected EAGs in 243 non-familial adult patients with primarily focal epilepsy (122 drug-resistant and 121 drug-responsive epilepsies). The pathogenicity of each variant was assessed through a customized stringent filtering process and classified according to the American College of Medical Genetics and Genomics guidelines. Results Possible causal genetic variants of epilepsy were uncovered in 13.2% of non-familial patients with primarily focal epilepsy. The diagnostic yield according to the seizure onset age was 25% (2/8) in the neonatal and infantile period, 11.1% (14/126) in childhood and 14.7% (16/109) in adulthood. The higher diagnostic yields were from ion channel-related genes and mTOR pathway-related genes, which does not significantly differ from the results of previous studies on familial or early-onset epilepsies. These potentially pathogenic variants, which were identified in genes that have been mainly associated with early-onset epilepsies with severe phenotypes, were also linked to epilepsies that start in or last until adulthood in this study. This finding suggested the presence of one or more disease-modifying factors that regulate the onset time or severity of epileptogenesis. The target hypothesis of epilepsy pharmacoresistance was not verified in our study. Instead, neurodevelopment-associated epilepsy genes, such as TSC2 or RELN, or structural brain lesions were more strongly associated with epilepsy pharmacoresistance. Conclusions We revealed a fraction of possible causal genetic variants of non-familial epilepsies in which genetic testing is usually overlooked. In this study, we highlight the importance of earlier identification of the genetic etiology of non-familial epilepsies, which leads us to the best treatment options in terms of precision medicine and to future neurobiological research for novel drug development. This should be considered a justification for physicians determining the hidden genetics of non-familial epilepsies that last until or start in adulthood.
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- 2019
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10. Excessive Daytime Sleepiness in Tension-Type Headache: A Population Study
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Kyung Min Kim, Jiyoung Kim, Soo-Jin Cho, Won-Joo Kim, Kwang Ik Yang, Chang-Ho Yun, and Min Kyung Chu
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excessive daytime sleepiness ,tension-type headache ,headache ,sleep ,epidemiology ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Excessive daytime sleepiness (EDS) is a prevalent sleep-related complaint across the general population and has been reported to be associated with headache. Tension-type headache (TTH) is the most commonly encountered headache and accounts for a significant amount of disease burden. However, the association between EDS and TTH is currently scarce. In the present study, we investigated the impact of EDS on the prevalence and clinical presentation of TTH. We utilized data from the Korean Headache-Sleep Study, a national survey that sought to identify headache and sleep characteristics in Korean adults. Participants with an Epworth sleepiness scale score greater or equal to 11 were considered as having EDS. Of the 2,695 participants enrolled, 570 (21.2%) and 313 (11.6%) had TTH and EDS, respectively. EDS was highly prevalent in individuals with chronic tension-type headache (CTTH) than in those without headache (35.7 vs. 9.4%, p < 0.001). The prevalence of EDS in episodic tension-type headache (ETTH) individuals with a headache frequency
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- 2019
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11. Poor sleep quality in migraine and probable migraine: a population study
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Tae-Jin Song, Soo-Jin Cho, Won-Joo Kim, Kwang Ik Yang, Chang-Ho Yun, and Min Kyung Chu
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Headache ,Migraine ,Pittsburgh sleep quality index ,Sleep ,Sleep quality ,Medicine - Abstract
Abstract Background Probable migraine (PM) is a subtype of migraine that is prevalent in the general population. Previous studies have shown that poor sleep quality is common among migraineurs and is associated with an exacerbation of migraine symptoms. However, information on the prevalence and clinical implication of poor sleep quality among individuals with PM is scarce. Thus, the aim of this study was to assess the prevalence and clinical impact of poor sleep quality in individuals with PM in comparison with those with migraine. Methods Two-stage cluster random sampling was used to perform the survey for sleep and headache in Korean general population. Participants with Pittsburgh Sleep Quality Index > 5 were considered as having poor sleep quality. Results Of 2695 participants, 379 (14.1%) had PM and 715 (26.5%) had poor sleep quality. Prevalence of poor sleep quality was 35.4% in the PM group, which was lower than that in the migraine group (47.6%, p = 0.011), but higher than that in the non-headache group (21.4%, p
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- 2018
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12. Immunogenicity after Second ChAdOx1 nCoV-19 (AZD1222) Vaccination According to the Individual Reactogenicity, Health Status and Lifestyle
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Hyunji Choi, Sun-Min Lee, Seungjin Lim, Kyung-Hwa Shin, Taeyun Kim, Won-joo Kim, Misook Yun, and Seung-Hwan Oh
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SARS-CoV-2 ,vaccines ,adverse effect ,neutralizing antibody ,cellular immune response ,BMI ,Medicine - Abstract
The immune-acquired responses after vaccination vary depending on the type of vaccine and the individual. The purpose of this study was to investigate the relationship between the acquisition of immunity and the side effects, health status, and lifestyle after completion of the second dose of AZD1222. Blood samples were collected after a second dose of AZD1222. The Euroimmun Anti-SARS-CoV-2 ELISA (IgG) for anti-S1 antibody, the cPASS SARS-CoV-2 neutralizing antibody detection kit for the surrogate virus neutralization test, and the T-spot Discovery SARS-CoV-2 kit were used to identify cellular immunogenicity. Patient experience of adverse effects was investigated using questionnaires. Information on health status and lifestyle were collected from the most recent health checkup data. Generally, females experience more reactogenicity in both intensity and duration. The rash of the first shot and chills of the second shot were associated with humoral immunity. However, comprehensive adverse effects had no correlation with humoral and cellular immunity. The T-spot-positive group had a higher creatinine level, which reflects muscle mass, than the T-spot-negative group. Males presented a higher level of T-spot assays. Body mass index and age were negatively correlated with the T-spot assay and anti-S1 antibody, respectively. Immune acquisition after the second AZD1222 shot was not associated with reactogenicity. However, individuals’ sex, age, and BMI were found to be associated with immunogenicity after vaccination.
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- 2021
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13. Insomnia in tension-type headache: a population-based study
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Jiyoung Kim, Soo-Jin Cho, Won-Joo Kim, Kwang Ik Yang, Chang-Ho Yun, and Min Kyung Chu
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Anxiety ,Depression ,Headache ,Insomnia ,Tension-type headache ,Medicine - Abstract
Abstract Background Tension-type headache (TTH) represents the most common type of headache among the general population. Although such headaches are usually mild in severity, some individuals with TTH experience severe symptoms and psychiatric comorbidities. Such patients may also experience sleep disturbances, which have been associated with headache exacerbation. Nevertheless, information regarding the prevalence and impact of insomnia among individuals with TTH in a population-based setting is limited. Therefore, the aim of the present study was to evaluate the prevalence and impact of insomnia among individuals with TTH using data from the Korean Headache-Sleep Study (KHSS). Methods We analysed data from the KHSS—a nation-wide, cross-sectional, population-based survey on headache and sleep involving Korean adults aged 19 to 69 years. Insomnia was defined as an Insomnia Severity Index score ≥ 10. Results Among 2695 participants, 570 (21.2%) and 290 (10.8%) were classified as having TTH and insomnia, respectively. Among individuals with TTH, 113 (19.8%) met the criteria for probable migraine (PM). The prevalence of insomnia among individuals with TTH was significantly higher than that among individuals without headache (13.2% vs. 5.8%, p
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- 2017
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14. Insufficient sleep is prevalent among migraineurs: a population-based study
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Jiyoung Kim, Soo-Jin Cho, Won-Joo Kim, Kwang Ik Yang, Chang-Ho Yun, and Min Kyung Chu
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Migraine ,Sleep ,Sleep deprivation ,Sleep time ,Epidemiology ,Medicine - Abstract
Abstract Background Sleep disorder and sleep complaints are common in subjects with migraine. Although the association between sleep disorders and migraine has been reported, the association between perceived insufficient sleep and migraine has rarely reported. The aim of this study is to evaluate the association between insufficient sleep and migraine using the data of the Korean Headache-Sleep Study (KHSS). Methods The KHSS is a nation-wide cross-sectional population-based survey regarding headache and sleep for Korean adults aged 19 to 69 years. A difference of one hour or more between sleep need and average sleep time indicated insufficient sleep. Results Of 2,695 participants, 727 (27.0%) individuals were classified as having insufficient sleep. The prevalence of insufficient sleep among individuals with migraine (45.5%) was significantly higher compared to that among individuals with non-migraine headache (32.9%, p = 0.004) or among non-headache (20.4%, p
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- 2017
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15. Restless legs syndrome and tension-type headache: a population-based study
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Pil-Wook Chung, Soo-Jin Cho, Won-Joo Kim, Kwang Ik Yang, Chang-Ho Yun, and Min Kyung Chu
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Restless legs syndrome ,Tension-type headache ,Anxiety ,Depression ,Medicine - Abstract
Abstract Background Recent studies have shown a significant association between restless legs syndrome (RLS) and primary headache disorders. Nevertheless, information regarding the association between tension-type headache (TTH) and RLS is limited. This study aimed to investigate the association between RLS and TTH in a population-based sample. Methods We selected a stratified random population sample of Koreans aged 19–69 years and assessed them using a semi-structured interview designed to identify RLS, headache type, and clinical characteristics of TTH. We determined the prevalence and clinical impact of RLS in participants with TTH. Results Of the 2695 participants, 570 (21.2%) and 142 (5.3%) were classified as having TTH and RLS, respectively. Among the 570 individuals with TTH, 113 (19.8%) also met the criteria for probable migraine (PM). The prevalence of RLS was significantly higher among individuals with TTH than among those with non-headache (6.0% vs 3.6%, p = 0.018). The prevalence of RLS was significantly higher in subjects with TTH who fulfilled PM criteria than in those with non-headache participants (8.0% vs. 3.6%, p = 0.018). However, RLS prevalence in individuals with TTH who did not fulfil PM criteria did not differ from that of participants with non-headache (5.5% vs. 3.6%, p = 0.063). TTH participants with RLS had higher visual analogue scale scores for headache intensity (5.1 ± 2.0 vs. 4.3 ± 1.8, p = 0.038), and higher prevalence of anxiety (20.6% vs. 8.8%, p = 0.022) and depression (14.7% vs. 3.5%, p = 0.002) than TTH participants without RLS. Multivariable analyses revealed that headache aggravation by movement (odds ratio [OR] = 2.4, 95% confidence interval [CI] = 1.1–5.2) and depression (OR = 3.5, 95% CI = 1.1–11.4) were significant indicators of RLS among individuals with TTH. Conclusions The prevalence of RLS was higher among individuals with TTH than among those with non-headache. Some clinical presentations varied in accordance with the presence of RLS among participants with TTH.
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- 2017
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16. Dural Arteriovenous Fistula Manifested as Rapid Progressive Dementia Successfully Treated by Endovascular Embolization Only
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Heewon Hwang, Yun Kyung La, Min Seok Baek, Kyoungwon Baik, Sang Hyun Suh, and Won-Joo Kim
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dural arteriovenous fistula ,dementia ,therapeutic embolization ,Medicine (General) ,R5-920 ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
A 43-year-old male presented with daytime sleepiness at work and indifferent behavior like never before. Two weeks prior to hospital admission, he had episodic memory loss with well preserved remote memory. Brain MRI showed a dural arteriovenous fistula (DAVF) in the right lateral transverse sinus with a bilateral thalamic venous infarction. Cerebral angiography confirmed a right transverse sigmoid dural arteriovenous fistula with a feeding artery of the right occipital artery and left posterior meningeal artery. The DAVF was completely eliminated through multiple endovascular interventions. Recently, endovascular treatment has become one of the main therapeutic options to obliterate a fistulous site, which has led to a rapid diagnostic approach and management of DAVFs with high curative rates. We report a rare case of posterior fossa located at a dural arteriovenous fistula that caused rapid progressive dementia and was successfully eliminated through only endovascular treatment.
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- 2017
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17. Prevalence, sleep characteristics, and comorbidities in a population at high risk for obstructive sleep apnea: A nationwide questionnaire study in South Korea.
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Jun-Sang Sunwoo, Young Hwangbo, Won-Joo Kim, Min Kyung Chu, Chang-Ho Yun, and Kwang Ik Yang
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Medicine ,Science - Abstract
To determine the prevalence, sleep characteristics, and comorbidities associated with a high risk for obstructive sleep apnea (OSA) in the Korean adult population.We analyzed data from 2,740 subjects who responded to a nationwide questionnaire survey of sleep characteristics. Those who qualified under two or more symptom categories of the Berlin questionnaire were defined as "at high risk for OSA". We investigated their socio-demographic information, sleep habits, and medical and psychiatric comorbidities. Logistic regression analyses were performed to identify factors and consequences significantly associated with a high risk for OSA.The prevalence of a high risk for OSA was 15.8% (95% confidence interval [CI] 14.5-17.2%). Multiple logistic regression analysis showed that old age (≥ 70 years, odds ratio [OR] 2.68) and body mass index ≥ 25 kg/m2 (OR 10.75) were significantly related with a high risk for OSA, whereas regular physical activity (OR 0.70) had a protective effect. Subjective sleep characteristics associated with a high risk for OSA were perceived insufficient sleep (OR 1.49), excessive daytime sleepiness (OR 1.88), and insomnia (OR 3.70). In addition, hypertension (OR 5.83), diabetes mellitus (OR 2.54), hyperlipidemia (OR 2.85), and anxiety (OR 1.63) were comorbid conditions independently associated with a high risk for OSA.This is the first study to demonstrate the prevalence of a high risk for OSA in a nationwide representative sample of the Korean adult population. These findings elucidate the epidemiology and clinical characteristics of those at high risk for OSA.
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- 2018
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18. Chemical Meningitis after Spinal or Epidural Anesthesia
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Seung Ha Lee, Myung jun Lee, and Won-Joo Kim
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Chemical meningitis ,Epidural anesthesia ,Spinal ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Background: Chemical meningitis results from foreign materials causing inflammation to the meninges covering the brain and spinal cord. Cerebrospinal fluid (CSF) study of chemical meningitis mimics bacterial meningitis. Case Report: We report three cases of chemical meningitis after spinal or epidural anesthesia with mepivacaine or bupivacaine. They experienced mental change or seizure. The results of CSF study revealed increased polymorphonuclear cell count and protein level and decreased glucose concentration. Gram staining and bacterial culture of CSF were all negative. We started empirical antibiotics and corticosteroids immediately and the patients were rapidly improved. Concclusion: The chemical meningitis should be differentiated in bacterial meningitis because bacterial meningitis is life-threatening and requires immediate antibiotic therapy. Chemical meningitis dramatically responds to steroid. The results of CSF study improved shortly after steroid administration.
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- 2014
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19. Genetic Variations of Gene Associated with Adverse Drug Reactions to Valproic Acid in Korean Epileptic Patients
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Ji Hyun Yi, Yang-Je Cho, Won-Joo Kim, Min Goo Lee, and Ji Hyun Lee
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drug toxicity ,epilepsy ,genetic polymorphism ,MRP2 ,valproic acid ,Genetics ,QH426-470 - Abstract
The multidrug resistance protein 2 (MRP2, ABCC2) gene may determine individual susceptibility to adverse drug reactions (ADRs) in the central nervous system (CNS) by limiting brain access of antiepileptic drugs, especially valproic acid (VPA). Our objective was to investigate the effect of ABCC2 polymorphisms on ADRs caused by VPA in Korean epileptic patients. We examined the association of ABCC2 single-nucleotide polymorphisms and haplotype frequencies with VPA related to adverse reactions. In addition, the association of the polymorphisms with the risk of VPA related to adverse reactions was estimated by logistic regression analysis. A total of 41 (24.4%) patients had shown VPA-related adverse reactions in CNS, and the most frequent symptom was tremor (78.0%). The patients with CNS ADRs were more likely to have the G allele (79.3% vs. 62.7%, p = 0.0057) and the GG genotype (61.0% vs. 39.7%, p = 0.019) at the g.-1774delG locus. The frequency of the haplotype containing g.-1774Gdel was significantly lower in the patients with CNS ADRs than without CNS ADRs (15.8% vs. 32.3%, p = 0.0039). Lastly, in the multivariate logistic regression analysis, the presence of the GG genotype at the g.-1774delG locus was identified as a stronger risk factor for VPA related to ADRs (odds ratio, 8.53; 95% confidence interval, 1.04 to 70.17). We demonstrated that ABCC2 polymorphisms may influence VPA-related ADRs. The results above suggest the possible usefulness of ABCC2 gene polymorphisms as a marker for predicting response to VPA-related ADRs.
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- 2013
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20. Fluid-Attenuated Inversion Recovery Hyperintense Vessels in Posterior Cerebral Artery Infarction
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Kwon-Duk Seo, Kee Oog Lee, Young-Chul Choi, Won-Joo Kim, and Kyung-Yul Lee
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Fluid-attenuated inversion recovery MRI ,Hyperintense vessel ,Posterior cerebral artery infarction ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Background: Fluid-attenuated inversion recovery hyperintense vessels (FHVs) are known to reflect stagnant or slow blood flow within the cerebral artery. FHVs are frequently observed in patients with acute cerebral infarction accompanied by arterial occlusion or significant stenosis of the anterior cerebral circulation. However, FHVs have not been studied in the context of posterior cerebral circulation. Thus, we investigated the prevalence of FHVs and its clinical significance in patients with acute posterior cerebral artery (PCA) territory infarction. Methods: In this retrospective study, consecutive patients with PCA territory infarction who underwent MRI within 1 week after symptom onset were enrolled. Two neurologists who were blinded to the angiographic findings read the images and determined the presence of FHVs. Afterwards, FHVs were graded according to the extent (subtle or prominent) and location (proximal or distal) of the hyperintense vessels. Neurologic deficits of the patients were assessed by the National Institutes of Health Stroke Scale (NIHSS) upon admission and after 5 days. The clinical outcome between patient groups based on FHVs grading was compared using the NIHSS. Among the patients with PCA occlusion, infarction volume on the diffusion-weighted image was compared between the two groups with and without distal FHVs. Results: FHVs were observed in 25 of the 87 patients (28.7%) with PCA territory infarction and in 65.7% of the 35 patients with significant arterial stenosis (10 patients) or occlusion (25 patients) in the posterior cerebral circulation. Among the 18 patients with PCA occlusion, the NIHSS score was significantly improved in patients with distal FHVs compared to the others (2.00 ± 2.18 vs. 0.56 ± 1.01, p = 0.04). The infarction volume was smaller in the distal FHV group than in the others (8.3 ± 8.7 vs. 16.8 ± 17.6 ml), but the difference was not statistically significant. Conclusions: FHVs are detected in patients with PCA territory infarction, especially in those with an occlusive lesion in the PCA. FHVs can be used as an imaging marker of PCA occlusion. Although this study showed a better clinical improvement in patients with distal FHVs, further study is needed to elucidate the clinical meaning of FHVs in PCA infarction.
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- 2013
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21. Anxiety and Depression in Tension-Type Headache: A Population-Based Study.
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Tae-Jin Song, Soo-Jin Cho, Won-Joo Kim, Kwang Ik Yang, Chang-Ho Yun, and Min Kyung Chu
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Medicine ,Science - Abstract
Although tension-type headache (TTH) is a frequent type of headache disorder and imposes a significant burden, there is scant information about the prevalence and impact of comorbid anxiety and depression among individuals with TTH. We investigated the prevalence and clinical impact of anxiety and depression among patients with TTH in the general population. We recruited Korean participants aged 19-69 years using a two-stage clustered random sampling method. To identify the presence of headache type, anxiety, and depression, we used a semi-structured interview using certain questionnaires. To assess the level of anxiety and depression, we used the Goldberg Anxiety Scale and Patient Health Questionnaire-9, respectively. Among 2,695 participants, 570 people (21.2%) had TTH during previous 1 year. In participants with TTH, the prevalence of anxiety (9.5% vs. 5.3%, p = 0.001) and depression (4.2% vs. 1.8%, p = 0.001) was significantly higher than that of non-headache participants. The prevalence of anxiety among TTH participants with >15 attacks per month [21.4%, odds ratio (OR): 4.0] and 1-14 attacks per month (13.1%, OR: 2.2) was higher than that in those with
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- 2016
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22. Human fetal brain-derived neural stem/progenitor cells grafted into the adult epileptic brain restrain seizures in rat models of temporal lobe epilepsy.
- Author
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Haejin Lee, Seokhwan Yun, Il-Sun Kim, Il-Shin Lee, Jeong Eun Shin, Soo Chul Park, Won-Joo Kim, and Kook In Park
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Medicine ,Science - Abstract
Cell transplantation has been suggested as an alternative therapy for temporal lobe epilepsy (TLE) because this can suppress spontaneous recurrent seizures in animal models. To evaluate the therapeutic potential of human neural stem/progenitor cells (huNSPCs) for treating TLE, we transplanted huNSPCs, derived from an aborted fetal telencephalon at 13 weeks of gestation and expanded in culture as neurospheres over a long time period, into the epileptic hippocampus of fully kindled and pilocarpine-treated adult rats exhibiting TLE. In vitro, huNSPCs not only produced all three central nervous system neural cell types, but also differentiated into ganglionic eminences-derived γ-aminobutyric acid (GABA)-ergic interneurons and released GABA in response to the depolarization induced by a high K+ medium. NSPC grafting reduced behavioral seizure duration, afterdischarge duration on electroencephalograms, and seizure stage in the kindling model, as well as the frequency and the duration of spontaneous recurrent motor seizures in pilocarpine-induced animals. However, NSPC grafting neither improved spatial learning or memory function in pilocarpine-treated animals. Following transplantation, grafted cells showed extensive migration around the injection site, robust engraftment, and long-term survival, along with differentiation into β-tubulin III+ neurons (∼34%), APC-CC1+ oligodendrocytes (∼28%), and GFAP+ astrocytes (∼8%). Furthermore, among donor-derived cells, ∼24% produced GABA. Additionally, to explain the effect of seizure suppression after NSPC grafting, we examined the anticonvulsant glial cell-derived neurotrophic factor (GDNF) levels in host hippocampal astrocytes and mossy fiber sprouting into the supragranular layer of the dentate gyrus in the epileptic brain. Grafted cells restored the expression of GDNF in host astrocytes but did not reverse the mossy fiber sprouting, eliminating the latter as potential mechanism. These results suggest that human fetal brain-derived NSPCs possess some therapeutic effect for TLE treatments although further studies to both increase the yield of NSPC grafts-derived functionally integrated GABAergic neurons and improve cognitive deficits are still needed.
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- 2014
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23. A Study on the p-Adic Integral Representation on ℤp Associated with Bernstein and Bernoulli Polynomials
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Lee-Chae Jang, Won-Joo Kim, and Yilmaz Simsek
- Subjects
Mathematics ,QA1-939 - Published
- 2010
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24. Performance Evaluation of Urine Dipstick Analyzer CYBOW R-600S
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Won-Joo Kim, Hyunji Choi, Shinae Yu, Min-Soon Park, Jiyoung Lee, and Sun Min Lee
- Published
- 2022
25. Classification Model for Epileptic Seizure Using Simple Postictal Laboratory Indices
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Hwang, Sun Jin Jin, Taesic Lee, Hyun Eui Moon, Eun Seok Park, Sue Hyun Lee, Young Il Roh, Dong Min Seo, Won-Joo Kim, and Heewon
- Subjects
seizure ,syncope ,serum ,ammonia ,bayes approach - Abstract
Distinguishing syncope from epileptic seizures in patients with sudden loss of consciousness is important. Various blood tests have been used to indicate epileptic seizures in patients with impaired consciousness. This retrospective study aimed to predict the diagnosis of epilepsy in patients with transient loss of consciousness using the initial blood test results. A seizure classification model was constructed using logistic regression, and predictors were selected from a cohort of 260 patients using domain knowledge and statistical methods. The study defined the diagnosis of seizures and syncope based on the consistency of the diagnosis made by an emergency medicine specialist at the first visit to the emergency room and the diagnosis made by an epileptologist or cardiologist at the first outpatient visit using the International Classification of Diseases 10th revision (ICD-10) code. Univariate analysis showed higher levels of white blood cells, red blood cells, hemoglobin, hematocrit, delta neutrophil index, creatinine kinase, and ammonia levels in the seizure group. The ammonia level had the highest correlation with the diagnosis of epileptic seizures in the prediction model. Therefore, it is recommended to be included in the first examination at the emergency room.
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- 2023
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26. The association between social jetlag and depression is independent of sleep debt
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Hee-Jin Im, Min Kyung Chu, Kwang Ik Yang, Won-Joo Kim, Inha Hwang, Jee-Eun Yoon, Dana Oh, Robert J. Thomas, and Chang-Ho Yun
- Subjects
Otorhinolaryngology ,Neurology (clinical) - Published
- 2023
27. Adjudin prevents neuronal damage and neuroinflammation via inhibiting mTOR activation against pilocarpine-induced status epilepticus
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Soojin Park, Jing Zhu, Kyoung Hoon Jeong, and Won-Joo Kim
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Male ,Mammals ,Mice, Inbred C57BL ,Mice ,Hydrazines ,Indazoles ,Status Epilepticus ,TOR Serine-Threonine Kinases ,General Neuroscience ,Neuroinflammatory Diseases ,Pilocarpine ,Animals - Abstract
Inflammatory responses in the brain play an etiological role in the development of epilepsy, suggesting that finding novel molecules for controlling neuroinflammation may have clinical value in developing the disease-modifying strategies for epileptogenesis. Adjudin, a multi-functional small molecule compound, has pleiotropic effects, including anti-inflammatory properties. In the present study, we aimed to investigate the effects of adjudin on pilocarpine-induced status epilepticus (SE) and its role in the regulation of reactive gliosis and neuroinflammation. SE was induced in male C57BL/6 mice that were then treated with adjudin (50 mg/kg) for 3 days after SE onset. Immunofluorescence staining, terminal deoxynucleotidyl transferase dUTP nick end labeling staining, and western blot analysis were used to evaluate the effects of adjudin treatment in the hippocampus after SE. Our results showed that adjudin treatment significantly mitigated apoptotic cell death in the hippocampus after SE onset. Moreover, adjudin treatment suppressed SE-induced glial activation and activation of mammalian target of rapamycin signaling in the hippocampus. Concomitantly, adjudin treatment significantly reduced SE-induced inflammatory processes, as confirmed by changes in the expression of inflammatory mediators such as tumor necrosis factor-α, interleukin-1β, and arginase-1. In conclusion, these findings suggest that adjudin may serve as a potential neuroprotective agent for preventing pathological mechanisms implicated in epileptogenesis.
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- 2022
28. Weekend catch-up sleep and depression: results from a nationally representative sample in Korea
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Won Joo Kim, Min Kyung Chu, Kyoung Heo, Kyung Min Kim, Seung Min Han, and In Kyung Min
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Adult ,medicine.medical_specialty ,National Health and Nutrition Examination Survey ,Depression ,business.industry ,General Medicine ,Nutrition Surveys ,Chronobiology Phenomena ,Republic of Korea ,Epidemiology ,Prevalence ,Humans ,Medicine ,Sleep ,business ,Beneficial effects ,Depression (differential diagnoses) ,Demography ,Management of depression - Abstract
There is limited information on the association between weekend catch-up sleep (CUS), which has beneficial effects on health, and depression. This study aimed to investigate the association between CUS and depression in adults.We used the data of the Seventh Korea National Health and Nutrition Examination Survey, 2016. Depression was defined as Patient Health Questionnaire-9 score ≥10. We categorized CUS duration as ≤0, 0 to 1, 1 to 2, and2 h.Of 5550 eligible participants, 3286 (54.9%), 1033 (19.5%), 723 (14.7%) and 508 (10.9%) had CUS duration ≤0, 0 to 1, 1 to 2, and2 h, respectively; of these, the prevalence of depression was 7.0%, 4.2%, 2.9%, and 6.0%, respectively. Multivariable regression analyses including covariates revealed that individuals with CUS duration 1 to 2 h had a significantly decreased risk of depression compared to individuals with CUS duration ≤0 h (odds ratio [OR] = 0.517, 95% CI = 0.309-0.865). Individuals with CUS duration 0 to 1 h (OR = 0.731, 95% CI = 0.505-1.060) and2 h (OR = 1.164, 95% CI = 0.718-1.886) showed no significantly different risk of depression.The risk of depression in individuals with CUS duration 1 to 2 h was lower than for those with CUS duration ≤0 h. This finding provides a better understanding on the association between CUS and depression; and can be a basis for better management of depression.
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- 2021
29. N°3 – Quantitative analyses of EEG in TGA patients
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Won-Joo Kim
- Subjects
Neurology ,Physiology (medical) ,Neurology (clinical) ,Sensory Systems - Published
- 2023
30. Some Identities of Fully Degenerate Bernoulli Polynomials Associated with Degenerate Bernstein Polynomials.
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Jeong Gon Lee, Won-Joo Kim, and Lee-Chae Jang
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- 2019
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31. Eugenol alleviates neuronal damage via inhibiting inflammatory process against pilocarpine-induced status epilepticus
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Jing Zhu, Soojin Park, Chul Hoon Kim, Kyoung Hoon Jeong, and Won-Joo Kim
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General Biochemistry, Genetics and Molecular Biology - Abstract
Neuroinflammation is one of the most common pathological outcomes in various neurological diseases. A growing body of evidence suggests that neuroinflammation plays a pivotal role in the pathogenesis of epileptic seizures. Eugenol is the major phytoconstituent of essential oils extracted from several plants and possesses protective and anticonvulsant properties. However, it remains unclear whether eugenol exerts an anti-inflammatory effect to protect against severe neuronal damage induced by epileptic seizures. In this study, we investigated the anti-inflammatory action of eugenol in an experimental epilepsy model of pilocarpine-induced status epilepticus (SE). To examine the protective effect of eugenol via anti-inflammatory mechanisms, eugenol (200 mg/kg) was administrated daily for three days after pilocarpine-induced SE onset. The anti-inflammatory action of eugenol was evaluated by examining the expression of reactive gliosis, pro-inflammatory cytokines, nuclear factor-κB (NF-κB), and the nucleotide-binding domain leucine-rich repeat with a pyrin-domain containing 3 (NLRP3) inflammasome. Our results showed that eugenol reduced SE-induced apoptotic neuronal cell death, mitigated the activation of astrocytes and microglia, and attenuated the expression of interleukin-1β and tumor necrosis factor α in the hippocampus after SE onset. Furthermore, eugenol inhibited NF-κB activation and the formation of the NLRP3 inflammasome in the hippocampus after SE. These results suggest that eugenol is a potential phytoconstituent that suppresses the neuroinflammatory processes induced by epileptic seizures. Therefore, these findings provide evidence that eugenol has therapeutic potential for epileptic seizures.
- Published
- 2023
32. Incorporation of Titanium into Ni-Rich Layered Cathode Materials for Lithium-Ion Batteries
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Woosuk Cho, Junho Song, Jong Hwa Kim, Hyuntae Kim, Won-Joo Kim, Min-Sik Park, Yong-Chan Kim, Jae Yup Jung, and Dong Young Rhee
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Materials science ,Energy Engineering and Power Technology ,chemistry.chemical_element ,Structural degradation ,Electrochemistry ,Cathode ,law.invention ,Ion ,chemistry ,Chemical engineering ,Cathode material ,law ,Materials Chemistry ,Chemical Engineering (miscellaneous) ,Thermal stability ,Lithium ,Electrical and Electronic Engineering ,Titanium - Abstract
In the development of a reliable cathode material for lithium-ion batteries (LIBs), it is crucial to clearly understand the structural degradation mechanism and its correlation with the electrochem...
- Published
- 2020
33. A Note on Distances between Interval-Valued Intuitionistic Fuzzy Sets.
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Lee-Chae Jang, Won-Joo Kim, and Taekyun Kim 0001
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- 2011
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34. Central Nervous System Infection-Related Isolated Hippocampal Atrophy as Another Subtype of Medial Temporal Lobe Epilepsy with Hippocampal Atrophy: A Comparison to Conventional Medial Temporal Lobe Epilepsy with Hippocampal Atrophy
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Won Joo Kim, Soochul Park, Jin Woo Chang, and Seung Koo Lee
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Pathology ,medicine.medical_specialty ,brain MRI ,Aura ,Central nervous system ,Automatism (medicine) ,Temporal lobe ,Lesion ,03 medical and health sciences ,Epilepsy ,0302 clinical medicine ,hippocampal atrophy ,central nervous system infection ,medicine ,030212 general & internal medicine ,medial temporal lobe epilepsy ,business.industry ,medicine.disease ,Hippocampal atrophy ,medicine.anatomical_structure ,Neurology ,Etiology ,Original Article ,Neurology (clinical) ,medicine.symptom ,business ,030217 neurology & neurosurgery - Abstract
Background and purpose Hippocampal atrophy (HA) resulting from a central nervous system (CNS) infection might be a relevant lesion responsible for the clinical characteristics of medial temporal lobe epilepsy. Methods The clinical characteristics of 54 patients with CNS infection-related medial temporal lobe epilepsy (MTLE) with isolated HA (CNS infection group) and 155 patients with conventional MTLE with HA (conventional group) were compared retrospectively. CNS infection alone and bilateral involvement of the HA were analyzed as prognostic factors, in addition to the detailed clinical characteristics, such as limbic aura and the presence and proportion of each type of automatism, between the two groups, and both medical and surgical prognoses were separately considered. A logistic regression analysis was performed. Results A statistical analysis including all clinical factors, including CNS infection with bilateral HA, did not reveal significant differences between the two groups. An analysis comparing the prognosis of the two groups based on good or poor prognosis among patients who received medical treatment and good or poor outcomes among patients who received surgical treatment did not produce significant differences. Conclusions In addition to bilateral HA, CNS infection alone was not a poor prognostic factor for the CNS infection-related epilepsy with HA group compared with the conventional MTLE with HA group. Based on these negative results, HA is a plausible and relevant lesion with similar clinical characteristics to HA in patients with conventional MTLE. Therefore, CNS infection-related MTLE with isolated HA might represent another subtype of MTLE with HA with a different etiology.
- Published
- 2020
35. Impacts of migraine on the prevalence and clinical presentation of depression: A population-based study
- Author
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Kwang Ik Yang, Won Joo Kim, Dong Hyun Lee, Min Kyung Chu, Kyung Min Kim, Soo-Jin Cho, and Chang-Ho Yun
- Subjects
Adult ,medicine.medical_specialty ,Pediatrics ,Migraine Disorders ,Population ,Anxiety ,Young Adult ,03 medical and health sciences ,0302 clinical medicine ,Surveys and Questionnaires ,Epidemiology ,Prevalence ,medicine ,Humans ,education ,Depression (differential diagnoses) ,Aged ,education.field_of_study ,Depression ,business.industry ,Headache ,Small sample ,Middle Aged ,medicine.disease ,030227 psychiatry ,Population based study ,Psychiatry and Mental health ,Clinical Psychology ,Cross-Sectional Studies ,Increased risk ,Migraine ,Presentation (obstetrics) ,business ,030217 neurology & neurosurgery - Abstract
A close association has been reported between depression and migraine. However, information concerning the impacts of migraine on the clinical presentation and prevalence of depression in a population-based study is currently limited.Data from the Korean Headache-Sleep Study, a nationwide survey about headache and sleep for adults aged 19-69 years were used. Depression was defined when Patient Health Questionnaire-9 score ≥ 10.Of 2,695 participants who included in this study, 116 (4.3%), 143 (5.3%), and 1130 (41.9%) had depression, migraine, and non-migraine headache, respectively. Migraine (24/116 [20.5%] vs. 119/2579 [4.7%], p 0.001) and non-migraine headache (67/116 [58.1%] vs. 1063/2579 [41.3%], p 0.001) was more prevalent in the group of participants with depression than among participants without depression. Among participants with depression, there was no statistically differences in total Patient Health Questionnaire-9 (PHQ-9) scores among migraine, non-migraine headache, and non-headache groups (median with interquartile range, 12.0 [10.2-18.0] vs. 13.0 [11.0-16.0] vs. 12.0 [10.0-15.2], p = 0.514). Among subcomponent scores of PHQ-9, all subcomponent scores did not significantly differ by headache status except feeling tired or having little energy scores (non-migraine headache 2.0 [2.0-3.0] vs. non-headache 2.0 [1.0-2.0], p = 0.010).Diagnosis of depression based on PHQ-9 questionnaire and small sample size in subgroup analyses.Participants with depression exhibit an increased risk of migraine and non-migraine headache compared with participants without depression. Among participants with depression, the severity of depression did not significantly differ on the basis of headache status.
- Published
- 2020
36. Sleep Status among Older Adults in Korea according to Urban or Rural Area Residence
- Author
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Won-Joo Kim, Yun Ho Choi, and Min Kyung Chu
- Subjects
Gerontology ,Sleep apnea syndromes ,business.industry ,medicine ,Insomnia ,Residence ,Restless legs syndrome ,medicine.symptom ,Rural area ,medicine.disease ,business ,Sleep in non-human animals - Published
- 2020
37. Impact of Insomnia Symptoms on the Clinical Presentation of Depressive Symptoms: A Cross-Sectional Population Study
- Author
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Kyoung Heo, Chang-Ho Yun, Won Joo Kim, Kwang Ik Yang, Min Kyung Chu, and Yun Ho Choi
- Subjects
medicine.medical_specialty ,insomnia ,Population ,prevalence ,clinical presentation ,Internal medicine ,Epidemiology ,mental disorders ,medicine ,Insomnia ,education ,RC346-429 ,Depressive symptoms ,Depression (differential diagnoses) ,Original Research ,education.field_of_study ,business.industry ,Insomnia severity index ,nervous system diseases ,Neurology ,depression ,Population study ,epidemiology ,Neurology (clinical) ,Neurology. Diseases of the nervous system ,medicine.symptom ,business - Abstract
Objective: Insomnia and depression are prevalent disorders that often co-occur. This study aimed to investigate the impact of clinically significant insomnia symptoms on the prevalence and clinical presentation of clinically significant depressive symptoms and vice versa.Methods: This study used data from the Korean Headache-Sleep Study (KHSS), a nationwide cross-sectional population-based survey regarding headache and sleep. Clinically significant insomnia symptoms were defined as Insomnia Severity Index (ISI) scores ≥ 10 and clinically significant depressive symptoms were defined as Patient Health Questionnaire-9 (PHQ-9) scores ≥ 10, respectively. We referred clinically significant insomnia symptoms and clinically significant depressive symptoms as insomnia symptoms and depressive symptoms, respectively.Results: Of 2,695 participants, 290 (10.8%) and 116 (4.3%) were classified as having insomnia and depressive symptoms, respectively. The prevalence of depressive symptoms was higher among participants with insomnia symptoms than in those without insomnia symptoms (25.9 vs. 1.7%, respectively, P < 0.001). Among participants with depressive symptoms, the PHQ-9 scores were not significantly different between participants with and without insomnia symptoms (P = 0.124). The prevalence of insomnia symptoms was significantly higher among participants with depressive symptoms than in those without depressive symptoms (64.7 vs. 8.3%, respectively, P < 0.001). The ISI scores were significantly higher among participants with insomnia and depressive symptoms than in participants with insomnia symptoms alone (P < 0.001).Conclusions: Participants with depressive symptoms had a higher risk of insomnia symptoms than did those without depressive symptoms. The severity of depressive symptoms did not significantly differ based on insomnia symptoms among participants with depressive symptoms; however, the severity of insomnia symptoms was significantly higher in participants with depressive symptoms than in those without depressive symptoms.
- Published
- 2021
38. Neurosyphilis Presenting with Status Epilepticus
- Author
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Won Joo Kim, Taedong Ok, Minsoo Sung, Byeong Joo Choi, and Grace Yoojin Lee
- Subjects
Neurosyphilis ,Pediatrics ,medicine.medical_specialty ,business.industry ,medicine ,Syphilis ,Status epilepticus ,medicine.symptom ,medicine.disease ,business - Published
- 2020
39. Tuning the Memory Window of TaOx ReRAM Using the RF Sputtering Power
- Author
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Won-joo Kim, Rainer Waser, Vikas Rana, and Dirk J. Wouters
- Subjects
Materials science ,business.industry ,Sputtering ,RF power amplifier ,Optoelectronics ,Radio frequency ,Sputter deposition ,business ,Layer (electronics) ,Deposition (law) ,Resistive random-access memory ,Voltage - Abstract
In this work, TaOx based ReRAM devices were fabricated by reactive sputtering. The impact of RF power on the device characteristics was investigated using five different RF powers ranging from 116 W (RF 20%) to 356 W (RF 60%), resulting in different film deposition rates. Depending on RF power, both the initial device resistance (R initial ) and forming voltage (V form ) were found to be changed. The switching layer sputtered at 116 W shows the highest R initial (80 GΩ), whereas the lowest resistance (50 kΩ) is obtained at 236 W. The device RESET level (R off ) is a function of R initial and V form . The largest memory window (R off / R on ~ 105) and 2-bit MLC operation are achieved at 236 W deposition power. These devices show excellent retention at 125 °C for 104 seconds and good endurance up to 106 cycles. These results reflect the impact of the sputtering deposition power on the electrical performance of the ReRAM devices. It is due to the fact that the structural defects and oxygen content in the deposited film are modulated by the sputtering power.
- Published
- 2021
40. Status epilepticus due to cerebral air embolism after the Valsalva maneuver
- Author
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Won Joo Kim, Hyun Ji Lyou, Hye Jeong Lee, and Grace Yoojin Lee
- Subjects
medicine.medical_specialty ,Neurology ,business.industry ,medicine.medical_treatment ,Pneumothorax ,Status epilepticus ,medicine.disease ,Air embolism ,lcsh:RC346-429 ,Embolism ,Anesthesia ,medicine ,Valsalva maneuver ,Embolism, air ,medicine.symptom ,business ,lcsh:Neurology. Diseases of the nervous system - Abstract
Background Cerebral air embolism is uncommon but potentially causes catastrophic events such as cardiac damage or even death. However, due to a low overall incidence, it may go undiagnosed. Case Report A 56-year-old man with a medical history of right upper lobectomy due to lung cancer showed changes in mental status after the Valsalva maneuver, followed by status epilepticus during admission. Brain and chest computed tomography showed cerebral air embolism and accidental pneumothorax in the right major fissure. After antiepileptic drug infusion and oxygen therapy, he recovered completely. Conclusion Since cerebral air embolism may result in fatal outcomes, it should be suspected in patients with sudden neurological deterioration after routine medical procedures.
- Published
- 2019
41. On Symmetric Identities of Carlitz’s Type q-Daehee Polynomials
- Author
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Won Joo Kim, Byung Moon Kim, and Lee-Chae Jang
- Subjects
Pure mathematics ,Article Subject ,Degree (graph theory) ,lcsh:Mathematics ,Mathematics::Number Theory ,010102 general mathematics ,Symmetry group ,Type (model theory) ,lcsh:QA1-939 ,01 natural sciences ,010101 applied mathematics ,Modeling and Simulation ,0101 mathematics ,Mathematics - Abstract
In this paper, we study Carlitz’s type q-Daehee polynomials and investigate the symmetric identities for them by using the p-adic q-integral on Zp under the symmetry group of degree n.
- Published
- 2019
42. High risk of obstructive sleep apnea, insomnia, and daytime sleepiness among commercial motor vehicle drivers
- Author
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Dae Seop Shin, Won Joo Kim, Taekyoung Jang, Min Kyung Chu, Young Hwangbo, Kwang Ik Yang, Chang-Ho Yun, and Jun Sang Sunwoo
- Subjects
Adult ,Male ,Sleep Wake Disorders ,Automobile Driving ,medicine.medical_specialty ,Neurology ,Population ,Excessive daytime sleepiness ,Disorders of Excessive Somnolence ,Odds ,03 medical and health sciences ,0302 clinical medicine ,Risk Factors ,Work Schedule Tolerance ,Internal medicine ,Prevalence ,Insomnia ,Humans ,Medicine ,Attention ,education ,Depression (differential diagnoses) ,Sleep Apnea, Obstructive ,education.field_of_study ,business.industry ,Epworth Sleepiness Scale ,Middle Aged ,medicine.disease ,Occupational Diseases ,Obstructive sleep apnea ,Cross-Sectional Studies ,030228 respiratory system ,Otorhinolaryngology ,Case-Control Studies ,Female ,Neurology (clinical) ,medicine.symptom ,business ,human activities ,Psychomotor Performance ,030217 neurology & neurosurgery - Abstract
We investigated the prevalence of sleep problems, such as obstructive sleep apnea (OSA), insomnia, and daytime sleepiness in commercial motor vehicle (CMV) drivers compared with that in the general population. This is a cross-sectional study comparing sleep habits and sleep problems in 110 truck drivers with 1001 matched controls from the general population. The assessment was based on self-administered questionnaires that included the Berlin questionnaire, the insomnia severity index, and the Epworth sleepiness scale (ESS). Multivariate regression analysis was performed to determine whether CMV drivers were independently associated with these sleep problems compared with controls. The prevalence of a high risk of OSA and insomnia was 35.5% and 15.2%, respectively, in CMV drivers, which was significantly higher than in controls with a prevalence of 12.2% and 4.1%, respectively (P
- Published
- 2019
43. Sex Differences in Prevalence, Symptoms, Impact, and Psychiatric Comorbidities in Migraine and Probable Migraine: A Population-Based Study
- Author
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Won Joo Kim, Kwang Ik Yang, Chang Ho Yun, Min Kyung Chu, Tae Jin Song, and Soo-Jin Cho
- Subjects
Adult ,Male ,medicine.medical_specialty ,Nausea ,Migraine Disorders ,Population ,Comorbidity ,Anxiety ,Severity of Illness Index ,Disability Evaluation ,03 medical and health sciences ,Sex Factors ,0302 clinical medicine ,Interquartile range ,Internal medicine ,Republic of Korea ,Epidemiology ,Prevalence ,medicine ,Humans ,030212 general & internal medicine ,education ,Depression (differential diagnoses) ,Psychiatric Status Rating Scales ,education.field_of_study ,Depression ,business.industry ,Age Factors ,Middle Aged ,medicine.disease ,Health Surveys ,Probable migraine ,Neurology ,Migraine ,Female ,Neurology (clinical) ,medicine.symptom ,business ,030217 neurology & neurosurgery - Abstract
OBJECTIVE This study was conducted to investigate sex differences in the prevalence and clinical presentation of migraine and probable migraine in a general population-based sample. BACKGROUND While there is research on sex differences in clinical characteristics and their impact on migraine headache, only few studies have investigated sex differences in probable migraine in population-based settings. Moreover, compared with Western countries, the prevalence of probable migraine in Asia is relatively high. This cross-sectional study was designed to investigate sex differences in the prevalence and clinical presentation of migraine and probable migraine in a general population-based sample. METHODS We used the data of the Korean Headache-Sleep Study, which is a nationwide survey on headache and sleep. RESULTS We interviewed 7430 people, and 3114 of them agreed to participate in our study (rejection rate, 58.1%). Among these people, 419 withdrew their participation during the interview. Ultimately, 2695 people completed our survey (cooperation rate, 36.3%). The prevalence of overall migraine and probable migraine was 350/1350 (25.9%) for women and 172/1345 (12.8%) for men (P
- Published
- 2019
44. A note on modified degenerate q-Daehee polynomials and numbers
- Author
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Byung Moon Kim, Won Joo Kim, Jeong Gon Lee, and Lee-Chae Jang
- Subjects
Pure mathematics ,Applied Mathematics ,Modified degenerate q-Daehee polynomials and numbers ,lcsh:Mathematics ,010102 general mathematics ,Degenerate energy levels ,lcsh:QA1-939 ,01 natural sciences ,010101 applied mathematics ,Modified q-Daehee polynomials and numbers ,Discrete Mathematics and Combinatorics ,0101 mathematics ,Analysis ,Mathematics - Abstract
We consider the modified degenerate q-Daehee polynomials and numbers of the second kind which can be represented as the p-adic q-integral. Furthermore, we investigate some properties of those polynomials and numbers.
- Published
- 2019
45. Increased expression of WNK3 in dispersed granule cells in hippocampal sclerosis of mesial temporal lobe epilepsy patients
- Author
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Won Joo Kim, Se Hoon Kim, Kyoung Hoon Jeong, Yun Ho Choi, and Inja Cho
- Subjects
Adult ,Male ,0301 basic medicine ,Pathology ,medicine.medical_specialty ,Adolescent ,Protein Serine-Threonine Kinases ,Hippocampal formation ,Hippocampus ,Epileptogenesis ,Statistics, Nonparametric ,Temporal lobe ,Young Adult ,03 medical and health sciences ,Epilepsy ,0302 clinical medicine ,medicine ,Humans ,Child ,Protein kinase A ,Neurons ,Hippocampal sclerosis ,Sclerosis ,business.industry ,Middle Aged ,medicine.disease ,Up-Regulation ,Granule cell dispersion ,030104 developmental biology ,Epilepsy, Temporal Lobe ,nervous system ,Neurology ,Child, Preschool ,Phosphopyruvate Hydratase ,Female ,Neurology (clinical) ,Cotransporter ,business ,030217 neurology & neurosurgery - Abstract
Granule cell dispersion (GCD) is a common neuropathological feature of hippocampal sclerosis (HS) in patients with temporal lobe epilepsy (TLE). However, the underlying molecular mechanism of GCD formation remains unclear. The present study aimed to investigate the expressional changes of With No Lysine protein kinase subtype 3 (WNK3), a molecule upstream of cation-chloride cotransporters with reciprocal expression in sclerosed hippocampus of TLE patients. Using immunofluorescence staining, we analyzed WNK3 immunoreactivity in hippocampal specimens from histologically normal controls and TLE patients with HS. Our results showed that WNK3 expression was significantly increased in dispersed granule neurons in hippocampal tissues from patients with TLE compared with histologically normal hippocampus. These findings demonstrate a potential association between an increased expression of WNK3 and GCD formation during the chronic phase of epilepsy. Controlling WNK3 expression may thus be a novel therapeutic target in epileptogenesis.
- Published
- 2018
46. Comparison of Serologic Response of Hospitalized COVID-19 Patients Using 8 Immunoassays
- Author
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Sun Min Lee, Chulhun L. Chang, Kyung-Hwa Shin, Su Jin Lee, Soo Young Moon, Seungjin Lim, In Suk Kim, and Won Joo Kim
- Subjects
medicine.medical_specialty ,Coronavirus disease 2019 (COVID-19) ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,Antibodies, Viral ,medicine.disease_cause ,Gastroenterology ,Antibodies ,Serology ,03 medical and health sciences ,0302 clinical medicine ,Internal medicine ,Humans ,Medicine ,Immunochromatographic Assays ,030212 general & internal medicine ,Coronavirus ,Immunoassay ,Korea ,medicine.diagnostic_test ,biology ,SARS-CoV-2 ,business.industry ,COVID-19 ,Basic Medical Sciences ,General Medicine ,Serum samples ,Hospitalization ,Immunoglobulin G ,biology.protein ,Original Article ,ELISA ,Reagent Kits, Diagnostic ,Antibody ,business - Abstract
Background In Korea, there were issues regarding the use of immunoassays for anti-severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) antibodies to detect infection. So, we compared antibody results of eight kinds of commercial immunoassays using clinical remnant specimens. Methods We compared the results of several immunoassay kits tested on 40 serum samples from 15 confirmed patients and 86 remnant serum samples from clinical laboratory. Eight kinds of IVD kits—four enzyme-linked immunosorbent assay, two lateral flow rapid immunochromatographic assays, and two chemiluminescent immunoassays with one RUO kit were tested. Results Among 40 serum samples from 15 coronavirus disease 2019 (COVID-19) patients, 35 yielded at least one positive result for detecting antibodies in the combined assessment. There were inconsistent results in 12 (28%) samples by single immunoassay. Forty samples collected in 2019 before the first COVID-19 Korean case showed negative results except for one equivocal result. Conclusion The discrepant results obtained with different immunoassay kits in this study show that serological assessment of SARS-CoV-2 by a single immunoassay requires caution not only in detecting infection but also in assessing immunologic status., Graphical Abstract
- Published
- 2021
47. Sex differences in the association between chronotype and risk of depression
- Author
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Won Joo Kim, Min Kyung Chu, Seung Min Han, Kyoung Heo, and Kyung Min Kim
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Adult ,Male ,Sleep Wake Disorders ,Time Factors ,National Health and Nutrition Examination Survey ,Prevalence ,lcsh:Medicine ,Diseases ,Article ,03 medical and health sciences ,Sex Factors ,Medical research ,0302 clinical medicine ,Sleep debt ,Surveys and Questionnaires ,Republic of Korea ,Humans ,Medicine ,Wakefulness ,lcsh:Science ,Association (psychology) ,Depression (differential diagnoses) ,Aged ,Sex Characteristics ,Multidisciplinary ,Depression ,business.industry ,lcsh:R ,Chronotype ,Odds ratio ,Middle Aged ,Nutrition Surveys ,Confidence interval ,Circadian Rhythm ,030227 psychiatry ,Neurology ,Female ,lcsh:Q ,Sleep ,business ,030217 neurology & neurosurgery ,Neuroscience ,Demography - Abstract
Information on sex differences in the association between chronotype and depression is scarce. We aimed to investigate these differences using data from the Korea National Health and Nutrition Examination Survey in 2016. Chronotypes were categorised based on mid-sleep time on free days corrected by sleep debt accumulated on workdays (MSFsc): early type, mean MSFsc + 1 SD. A Patient Health Questionnaire-9 score of ≥ 10 indicated depression. Among 5550 non-shift working adults aged 19–80 years, the prevalence rates of depression in the early, intermediate, and late chronotype groups were 7.4%, 4.5%, and 9.3%, respectively. Women with late chronotype (odds ratio [OR] = 2.9, 95% confidence interval [CI] = 1.8–4.7) showed a higher risk of depression than women with intermediate chronotype after adjusting for covariates. Women with early chronotype did not show a significant difference in depression risk (OR = 1.3, 95% CI = 0.9–2.0). In conclusion, late chronotype is associated with an increased risk of depression in women but not in men. Early chronotype is not associated with depression in women or men.
- Published
- 2020
48. Vascular endothelial growth factor receptor-3 regulates astroglial glutamate transporter-1 expression via mTOR activation in reactive astrocytes following pilocarpine-induced status epilepticus
- Author
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Mun-Yong Lee, Kyung-Ok Cho, Won Joo Kim, Kyoung Hoon Jeong, and Seong Yun Kim
- Subjects
0301 basic medicine ,Vascular Endothelial Growth Factor A ,Amino Acid Transport System X-AG ,Hippocampus ,Status epilepticus ,Biology ,03 medical and health sciences ,Cellular and Molecular Neuroscience ,chemistry.chemical_compound ,0302 clinical medicine ,Status Epilepticus ,Downregulation and upregulation ,medicine ,Humans ,Receptor ,PI3K/AKT/mTOR pathway ,TOR Serine-Threonine Kinases ,Glutamate receptor ,Pilocarpine ,medicine.disease ,Vascular Endothelial Growth Factor Receptor-3 ,Cell biology ,Astrogliosis ,Vascular endothelial growth factor ,030104 developmental biology ,Neurology ,chemistry ,Excitatory Amino Acid Transporter 2 ,Astrocytes ,medicine.symptom ,030217 neurology & neurosurgery - Abstract
Recent evidence has shown that the vascular endothelial growth factor (VEGF) system plays a crucial role in several neuropathological processes. We previously reported an upregulation of VEGF-C and its receptor, VEGFR-3, in reactive astrocytes after the onset of status epilepticus (SE). However, it remains unknown, which molecules act as downstream signals following VEGFR-3 upregulation, and are involved in reactive astrogliosis after SE. Therefore, we investigated whether VEGFR-3 upregulation within reactive astrocytes is associated with the activation of mammalian target of rapamycin (mTOR) signaling, which we confirmed by assaying for the phosphorylated form of S6 protein (pS6), and whether VEGFR-3-mediated mTOR activation induces astroglial glutamate transporter-1 (GLT-1) expression in the hippocampus after pilocarpine-induced SE. We found that spatiotemporal expression of pS6 was consistent with VEGFR-3 expression in the hippocampus after SE, and that both pS6 and VEGFR-3 were highly expressed in SE-induced reactive astrocytes. Treatment with the mTOR inhibitor rapamycin decreased astroglial VEGFR-3 expression and GLT-1 expression after SE. Treatment with a selective inhibitor for VEGFR-3 attenuated astroglial pS6 expression as well as suppressed GLT-1 expression and astroglial reactivity in the hippocampus after SE. These findings demonstrate that VEGFR-3-mediated mTOR activation could contribute to the regulation of GLT-1 expression in reactive astrocytes during the subacute phase of epilepsy. In conclusion, the present study suggests that VEGFR-3 upregulation in reactive astrocytes may play a role in preventing hyperexcitability induced by continued seizure activity.
- Published
- 2020
49. Self-reported insomnia as a marker for anxiety and depression among migraineurs: a population-based cross-sectional study
- Author
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Kwang Ik Yang, Kyung Min Kim, Won Joo Kim, Eun Ju Lee, Min Kyung Chu, Chang-Ho Yun, Yun Ho Roh, Soo-Jin Cho, and Dong Hyun Lee
- Subjects
Adult ,Male ,medicine.medical_specialty ,Cross-sectional study ,Migraine Disorders ,Population ,lcsh:Medicine ,Comorbidity ,Anxiety ,Sensitivity and Specificity ,Article ,Young Adult ,03 medical and health sciences ,0302 clinical medicine ,Predictive Value of Tests ,Sleep Initiation and Maintenance Disorders ,Internal medicine ,Republic of Korea ,mental disorders ,Insomnia ,Humans ,Medicine ,030212 general & internal medicine ,lcsh:Science ,education ,Migraine ,Depression (differential diagnoses) ,Aged ,education.field_of_study ,Multidisciplinary ,Depression ,business.industry ,lcsh:R ,Reproducibility of Results ,Sleep disorders ,Odds ratio ,Middle Aged ,medicine.disease ,Cross-Sectional Studies ,Female ,lcsh:Q ,Self Report ,medicine.symptom ,business ,030217 neurology & neurosurgery - Abstract
Anxiety, depression, and insomnia are highly prevalent among migraineurs and are associated with negative health consequences. Anxiety and depression, however, unlike insomnia, are usually underdiagnosed, due to less self-reporting of these two conditions. The aim of the present study was to evaluate the risk of anxiety and depression in migraineurs with self-reported insomnia, using a general population-based sample. We used data from a nationwide population-based survey on headache and sleep, the Korean Headache-Sleep Study. Of all 2,695 participants, 143 (5.3%), 268 (10.0%), 116 (4.3%), and 290 (10.8%) were classified as having migraine, anxiety, depression, and self-reported insomnia, respectively. The risk of anxiety (odds ratio [OR] = 7.0, 95% confidence interval [CI] = 3.0–16.7) and depression (OR = 3.3, 95% CI = 1.3–8.5) was significantly increased in migraineurs with self-reported insomnia. The sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) for anxiety in migraineurs with self-reported insomnia were 46.5%, 89.0%, 64.5%, and 79.5%, respectively. For depression, the sensitivity, specificity, PPV, and NPV were 41.7%, 82.4%, 32.3%, and 87.5%, respectively. Self-reported insomnia is likely to be comorbid with anxiety and depression in migraineurs and could thus be a useful predictor of anxiety and depression in migraine.
- Published
- 2019
50. Excessive Daytime Sleepiness in Tension-Type Headache: A Population Study
- Author
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Won Joo Kim, Min Kyung Chu, Chang-Ho Yun, Soo-Jin Cho, Kyung Min Kim, Jiyoung Kim, and Kwang Ik Yang
- Subjects
medicine.medical_specialty ,Severe headache ,Visual analogue scale ,Population ,Excessive daytime sleepiness ,lcsh:RC346-429 ,03 medical and health sciences ,0302 clinical medicine ,Internal medicine ,Epidemiology ,medicine ,030212 general & internal medicine ,sleep ,education ,lcsh:Neurology. Diseases of the nervous system ,Depression (differential diagnoses) ,Original Research ,education.field_of_study ,business.industry ,excessive daytime sleepiness ,Epworth Sleepiness Scale ,tension-type headache ,Neurology ,Population study ,epidemiology ,Neurology (clinical) ,medicine.symptom ,business ,headache ,030217 neurology & neurosurgery - Abstract
Excessive daytime sleepiness (EDS) is a prevalent sleep-related complaint across the general population and has been reported to be associated with headache. Tension-type headache (TTH) is the most commonly encountered headache and accounts for a significant amount of disease burden. However, the association between EDS and TTH is currently scarce. In the present study, we investigated the impact of EDS on the prevalence and clinical presentation of TTH. We utilized data from the Korean Headache-Sleep Study, a national survey that sought to identify headache and sleep characteristics in Korean adults. Participants with an Epworth sleepiness scale score greater or equal to 11 were considered as having EDS. Of the 2,695 participants enrolled, 570 (21.2%) and 313 (11.6%) had TTH and EDS, respectively. EDS was highly prevalent in individuals with chronic tension-type headache (CTTH) than in those without headache (35.7 vs. 9.4%, p < 0.001). The prevalence of EDS in episodic tension-type headache (ETTH) individuals with a headache frequency
- Published
- 2019
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