• Title/Summary/Keyword: Cohort Studies

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Prediction of Sleep Disturbances in Korean Rural Elderly through Longitudinal Follow Up (추적 관찰을 통한 한국 농촌 노인의 수면 장애 예측)

  • Park, Kyung Mee;Kim, Woo Jung;Choi, Eun Chae;An, Suk Kyoon;Namkoong, Kee;Youm, Yoosik;Kim, Hyeon Chang;Lee, Eun
    • Sleep Medicine and Psychophysiology
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    • v.24 no.1
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    • pp.38-45
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    • 2017
  • Objectives: Sleep disturbance is a very rapidly growing disease with aging. The purpose of this study was to investigate the prevalence of sleep disturbances and its predictive factors in a three-year cohort study of people aged 60 years and over in Korea. Methods: In 2012 and 2014, we obtained data from a survey of the Korean Social Life, Health, and Aging Project. We asked participants if they had been diagnosed with stroke, myocardial infarction, angina pectoris, arthritis, pulmonary tuberculosis, asthma, cataract, glaucoma, hepatitis B, urinary incontinence, prostate hypertrophy, cancer, osteoporosis, hypertension, diabetes, hyperlipidemia, or metabolic syndrome. Cognitive function was assessed using the Mini-Mental State Examination for dementia screening in 2012, and depression was assessed using the Center for Epidemiologic Studies Depression Scale in 2012 and 2014. In 2015, a structured clinical interview for Axis I psychiatric disorders was administered to 235 people, and sleep disturbance was assessed using the Pittsburgh Sleep Quality Index. The perceived stress scale and the State-trait Anger Expression Inventory were also administered. Logistic regression analysis was used to predict sleep disturbance by gender, age, education, depression score, number of coexisting diseases in 2012 and 2014, current anger score, and perceived stress score. Results: Twenty-seven percent of the participants had sleep disturbances. Logistic regression analysis showed that the number of medical diseases three years ago, the depression score one year ago, and the current perceived stress significantly predicted sleep disturbances. Conclusion: Comorbid medical disease three years previous and depressive symptoms evaluated one year previous were predictive of current sleep disturbances. Further studies are needed to determine whether treatment of medical disease and depressive symptoms can improve sleep disturbances.

Clinical Characteristics of Chronic Cough in Korea

  • An, Tai Joon;Kim, Jin Woo;Choi, Eun Young;Jang, Seung Hun;Lee, Hwa Young;Kang, Hye Seon;Koo, Hyeon-Kyoung;Lee, Jong Min;Kim, Sung-Kyung;Shin, Jong-Wook;Park, So Young;Rhee, Chin Kook;Moon, Ji-Yong;Kim, Yee Hyung;Lee, Hyun;Kim, Yong Hyun;Kim, Je Hyeong;Lee, Sang Haak;Kim, Deog Kyeom;Yoo, Kwang Ha;Kim, Dong-Gyu;Jung, Ki-Suck;Kim, Hui Jung;Yoon, Hyoung Kyu;Cough Study Group of the Korean Academy of Tuberculosis and Respiratory Diseases
    • Tuberculosis and Respiratory Diseases
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    • v.83 no.1
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    • pp.31-41
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    • 2020
  • Background: Chronic cough is defined as a cough lasting more than 8 weeks and socio-economic burden of chronic cough is enormous. The characteristics of chronic cough in Korea are not well understood. The Korean Academy of Tuberculosis and Respiratory Diseases (KATRD) published guidelines on cough management in 2014. The current study evaluated the clinical characteristics of chronic cough in Korea and the efficacy of the KATRD guidelines. Methods: This was a multi-center, retrospective observational study conducted in Korea. The participants were over 18 years of age. They had coughs lasting more than 8 weeks. Subjects with current pulmonary diseases, smokers, exsmokers with more than 10 pack-years or who quit within the past 1 year, pregnant women, and users of cough-inducing medications were excluded. Evaluation and management of cough followed the KATRD cough-management guidelines. Results: Participants with chronic cough in Korea showed age in the late forties and cough duration of more than 1 year. Upper airway cough syndrome was the most common cause of cough, followed by cough-variant asthma (CVA). Gastro-esophageal reflux diseases and eosinophilic bronchitis were less frequently observed. Following the KATRD cough-management guidelines, 91.2% of the subjects improved after 4 weeks of treatment. Responders were younger, had a longer duration of cough, and an initial impression of CVA. In univariate and multivariate analyses, an initial impression of CVA was the only factor related to better treatment response. Conclusion: The causes of chronic cough in Korea differed from those reported in other countries. The current Korean guidelines proved efficient for treating Korean patients with chronic cough.

Bone Mineral Density and Bone Markers in the Children with Epilepsy Taking on Chronic Anticonvulsants (장기간 항경련제를 복용하고 있는 소아 간질 환아들의 골밀도 및 골대사 지표들)

  • Lee, Soon Bum;Kang, So Young;Yu, Jeesuk
    • Clinical and Experimental Pediatrics
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    • v.48 no.5
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    • pp.527-533
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    • 2005
  • Purpose : Long-term administration of anticonvulsants in children with epilepsy may cause short stature, hypocalcemia and low bone mineral density. This study was performed for the early detection of abnormal bone metabolism in children with epilepsy on taking anticonvulsants. Methods : Thirty children aged 5 to 16 years who were diagnosed with epilepsy were enrolled in this study. All had taken anticonvulsants for more than one year. Bone mineral density of lumbar vertebra was measured by dual-energy X-ray absorptiometry. Serum calcium, phosphorous, alkaline phosphatase, 25-hydroxycholecalciferol[$25(OH)D_3$], parathyroid hormone, and urine deoxypyridinoline were measured as biochemical bone markers. Bone age and body mass index were also calculated. Results : Bone minreal density, body mass index, bone age, and height were significantly decreased in two female patients who had taken two antiepileptic drugs for more than four years and they also had chronic diseases such as cerebral palsy with microcephaly, encephalomalacia, and microcephaly with atrial septal defect. Bone mineral density had significant positive correlations with body mass index(P<0.01) and bone age(P<0.01). Conclusion : This study showed chronic medication of anticonvulsants in children may cause low bone mineral density and short stature. Bone age and body mass index could be the important surrogate markers to find the population at risk. More studies, including a large study population and long term cohort study, will be required.

Relevance of Vitamin D and Dyslipidemia Among Korean Adults - Using Data from the Sixth Korea National Health and Nutrition Examination Survey, 2013~2014 (한국 성인의 비타민 D 수준과 이상지질혈증과의 관련성 - 제 6기(2013년, 2014년) 국민건강영양조사 자료를 이용하여)

  • kim, han-soo;Han, Yeo-Jung;Kim, Byung-Cheol;Ryu, So-Yeon
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.18 no.3
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    • pp.647-656
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    • 2017
  • Purpose: This study investigated the relationship between vitamin D level and dyslipidemia in Korean adults aged 19 years and older. The data for analysis were obtained from the sixth Korea National Health Nutrition Examination Survey 2013 and 2014. Result: This study showed that 74.4% of the specified adult population had vitamin D deficiency. Moreover, the prevalence of dyslipidemia was found to be 39.6% in the same population. Dyslipidemia differed significantly according to gender (p<0.001), age (p<0.001), smoking status (p<0.001), subjective health status (p<0.001), BMI (p<0.001), blood pressure (p<0.001), FBS (p<0.001), physical activity (p<0.001), and vitamin D level (p<0.001). When vitamin D deficiency was less than 20.0 ng/mL, there was a significant risk of dyslipidemia with an odds ratio of 1.29 (95% Cl, 1.11-1.51). The relationship between vitamin D level and a diagnosis index of dyslipidemia with controlled status of physical activity was statistically significant; in Korean adults, the odds ratio for total cholesterol was 1.41 (95% CI, 1.04-1.81) and for triglyceride was 1.36 (95% CI, 1.11-1.66). Conclusion: Our results showed the relationship between vitamin D level and dyslipidemia was significant in Korean adults, and total cholesterol and triglycerides, which are indicators of dyslipidemia, was significant. Future studies, such as a more systematic cohort study investigating the relationship between vitamin D level and dyslipidemia may be helpful in confirming the causal relationship between vitamin D and dyslipidemia.

Comparison of the Neurologic Outcome according to the Method of Proximal Graft Anastomosis at the Aortic Side during Off-pump Coronary Artery Bypass Grafting: The Heartstring Sealing System versus Conventional Manual Anastomosis (무심폐기 관상동맥 우회술에 있어서 이식편의 대동맥부 근위부 문합 방법에 따른 수술 후 신경학적 합병증 발생의 비교: 하트스트링을 이용한 방법 대 고식적인 수기 문합술)

  • Cho, Won-Chul;Kim, Joon-Bum;Kim, Hee-Jung;Kim, Hwan-Wook;Kim, Yun-Seok;Jung, Jae-Seung;Choo, Suk-Jung
    • Journal of Chest Surgery
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    • v.42 no.4
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    • pp.441-446
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    • 2009
  • Background: Side clamping of ascending aorta during proximal graft anastomosis in coronary bypassing surgery in-creases the risk of direct aortic injury as well as embolization of intimal atheroma. Heartstring proximal sealing system (Guidant Corporation, Santa Clara, Calif), developed to avoid aortic side clamping, may minimize risks of such complications. The aim of the current study is to compare the surgical outcomes of the two proximal anastomosis techniquesi.e., Heartstring system versus aortic side clamping in off pump coronary bypassing' surgery (OPCAB). Material and Method: From January 2003 to August 2008, 499 patients underwent OPCAB. Of them, proximal graft anastomosis was performed using Heartstring system in 182 patients (Group I) and conventional manual anastomosis in 317 patients (Group II). The two groups were compared for postoperative major complications and mortality. Result: Two groups showed similar characteristics in terms of preoperative demographic data, left ventricular ejection fraction, renal function and history of diabetes, hypertension and smoking. Although there was no inter-group difference in the history of cerebral ischemia (p=0.48), preoperative brain magnetic resonance angiography revealed greater incidence of severe carotid artery stenosis (>75% of lumen) in the Group I than in the. Group II (44.5% in the Group I and 30.0% in the Group II, p=0.003). There were no inter-group differences in postoperative mortality (p=0.40) and complications (p=0.47) including neurologic events (3 in the Group land 2 in the Group II, p=0.258). Whereas neurologic events all comprised transient ischemic attacks in the Group I, they comprised multiple embolic strokes in the Group II. One patient in the Group II experienced aortic dissection during proximal anastomosis which resulted in ascending aortic replacement. Conclusion: Although proximal anastomosis using Heartstring system did not show statistically significant benefit over aortic side clamping, the. absence of embolic stroke maybe a definite benefit which may be better defined through further studies over a larger cohort.

Immunogenicity and Protective Effectiveness of Japanese Encephalitis Vaccine: A Prospective Multicenter Cohort Study (일본뇌염 예방접종 후 면역원성 및 중화항체 지속률에 관한 조사: 전향적 다기관 코호트 연구)

  • Kim, Dong Hyun;Hong, Young-Jin;Lee, Hoon-Jai;Choi, Bo-Yul;Kim, Chang Hwi;Park, Jae Ock;Kang, Jin Han;Choi, Byung Joon;Kim, Jong Hyun;Ahn, Young Min;Ju, Young Ran;Jeong, Young Eui;Han, Myung Guk
    • Pediatric Infection and Vaccine
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    • v.20 no.3
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    • pp.131-138
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    • 2013
  • Purpose: This study aimed to study the antibody response of Japanese encephalitis vaccination in children using different kinds of vaccines (inactivated vaccine, live attenuated vaccine or interchanged) and evaluate the effectiveness of the vaccines to provide the basis of efficient immunization schedule of Japanese encephalitis. Methods: Measurement of the neutralization antibody (NTAb) titers following Japanese encephalitis vaccination using different vaccines for 170 children, 2-6 year of age, who visited six university hospitals and are confirmed by immunization records. Results: Among 170 children who were given primary immunization on Japanese encephalitis, 103 children were given inactivated vaccine, 64 children were given live attenuated vaccine and 3 children were given interchangeably. NTAb titers were more than 1:10 in all children of three groups. The geographic mean antibody titer was 322 in inactivated vaccine group and 266 in live attenuated vaccine group. However, there was no significant difference between two groups. In both groups, the NTAb titer showed the peak at 1-4 months after the third immunization and declined. The NTAb titers of three children who were given two kinds of vaccines alternately were 1:135, 1:632, and 1:2511, respectively. Conclusion: According to the results of this study in children younger than 6 years old, there is no significant difference in effectiveness between inactivated and live attenuated vaccines. However, further studies for the changes of antibody titers for a longer period of time on larger population are required.

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Comparison of the Serum Cholesterol, Insulin Resistance and Markers of Metabolic Syndrome Based on Hepatitis C Virus RNA (C형 간염 바이러스 RNA 유무에 따른 지질, 인슐린저항성 및 대사증후군 지표 수준의 차이)

  • Cho, Sung-Hwan;Kim, Yun-Jin;Lee, Sang-Yeoup;Cho, Byung-Mann;Hwang, Hye-Lim;Yi, Yu-Hyeon;Cho, Young-Hye;Tak, Young-Jin;Jeong, Dong-Wook;Lee, Seung-Hun;Lee, Jeong-Gyu
    • Journal of agricultural medicine and community health
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    • v.41 no.4
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    • pp.205-216
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    • 2016
  • Objectives: We compared the difference of lipid, insulin resistance and metabolic markers based on HCV RNA in Korean adults.Methods: This was a cross-sectional study of 222 subjects visited the health promotion center of Pusan nationaluniversity hospital from 2004 to 2007. Subjects were anti-HCV antibody positive and were performed RT-PCR for HCV RNA. The HCV RNA (+) group were 85 subjects, HCV RNA (-) control group were 115 subjects, and the HCV RNA (-) but past positive group were 22 subjects. We performed anthropometry, anti-HCV, RT-PCR, plasma concentrations of insulin, total cholesterol, LDL-cholesterol, HDL-cholesterol, and triglyceride.Results: BMI, waist circumference, blood pressure, fasting plasma glucose, triglyceride, HDL cholesterol, insulin resistance such as HOMA-IR and QUICKI were not significantly different between HCV RNA positive and negative groups. The serum total cholesterol and LDL cholesterol level were significantly lower in the HCV RNA positive group than in the negative group ($186.24{\pm}37.63$ vs $197.22{\pm}37.23$ mg/dl, p=0.041, $111.66{\pm}34.06$ vs $121.38{\pm}35.50$ mg/dl, p=0.042). After adjusting age and sex, high total cholesterol (${\geq}200mg/dl$) (adjusted OR=0.51, 95%CI 0.28-0.94, p=0.03) and high LDL cholesterol (${\geq}130mg/dl$) (adjusted OR=0.46, 95%CI 0.24~0.87, p=0.02) were inversely associated with being HCV RNA positive (p<0.05). Conclusion: The serum total cholesterol and LDL-cholesterol level were significantly lower in HCV RNA (+) group than in HCV RNA (-) group, but not in HCV RNA (-) but past positive group. Prospective cohort studies are needed to clarify the relationship between HCV RNA and metabolic markers.

Relevance of Serum Vitamin D and Indices Related To Cardiovascular Disease Among Korean Adults (한국 성인의 혈청 비타민 D 수준과 심혈관 질환 관련 지표와의 관련성)

  • Kim, Han-Soo;Ryu, So-Yeon
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.19 no.6
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    • pp.365-374
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    • 2018
  • This study investigated the relationship between Vitamin D levels and indices related to cardiovascular disease in Korean adults aged ${\geq}19years$. The data for analysis were obtained from the sixth Korea National Health Nutrition Examination Survey in 2013 and 2014. The results showed that the incidence of Vitamin D deficiency was 73.1% among Korean adults and that indices related to cardiovascular disease showed an increasing trend (55.6% of Korean adults). The relationship between Vitamin D levels and indices related to cardiovascular disease with controlled physical activity status was also studied. The odds ratios (ORs) for age were 1.72 for the 4-62 years age group (95% CI, 1.53-1.93) and 2.05 for the ${\geq}65years$ age group (95% CI, 1.71-2.45). For blood pressure, the OR for pre-hypertension was 1.30 (95% CI, 1.15-1.47) and that for hypertension was 1.31 (95% CI, 1.11-1.54). For body mass index (BMI), the OR was 1.36 (95% CI, 1.11-1.66) and that for waist circumference (WC) was 1.36 (95% CI, 1.11-1.66). For fasting blood sugar (FBS), the OR for impaired fasting glucose (IFG) was 1.37 (95% CI, 1.21-1.55) and that for diabetes mellitus (DM) was 1.31 (95% CI, 1.05-1.65). The OR for total cholesterol (TC) was 1.30 (95% CI, 1.11-1.52) and that for triglycerides (TG) was 1.20 (95% CI, 1.04-1.37) in Korean adults. There was a significant relationship between Vitamin D and indices related to cardiovascular disease in Korean adults with respect to age, blood pressure, FBS, BMI, TC and TG. Confirmation of a causal relationship between Vitamin D and indices related to cardiovascular disease may require further research consisting of more systematic cohort studies.

The Clinical and Histopathologic Features according to Loss of LKB1 Protein Expression on Primary Lung Cancer (원발성 폐암에서 LKB1 단백질 발현 소실에 따른 임상 양상 및 조직병리학적 특성)

  • Hwang, Ki Eun;Jo, Hyang-Jeong;Lee, Kang Kyoo;Sim, Hyeok;Song, Jung Sup;Shin, Jeong Hyun;Shin, Seong Nam;Park, Seong-Hoon;Hong, Kyeong-Man;Park, Jung-Hyun;Jeong, Jong-Hoon;Kim, Hui Jung;Kim, Hak-Ryul;Yang, Sei-Hoon;Jeong, Eun-Taik
    • Tuberculosis and Respiratory Diseases
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    • v.64 no.5
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    • pp.362-368
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    • 2008
  • Background: LKB1(STK11) is a serine/threonine kinase that functions as a tumor growth suppressor. The functions of LKB1 in lung cancer are not completely understood. This study evaluated the relationship between LKB1 protein expression and the clinicopathological features in lung cancer tissues. Methods: The expression of LKB1 was studied in paraffin-embedded tumor blocks, which were obtained from 77 patients who had undergone surgery at Wonkwang University Hospital. The expression of the LKB1 protein was considered positive if the staining intensity in the tumor tissue adjacent to the normal airway epithelium was >30%. Results: The LKB1 expression was positive in 31 (40%) of samples. Loss of LKB1 expression was significantly associated with being male, smoking history, and squamous cell carcinoma. In the peripheral sites, the loss of LKB1 expression was strongly associated with a smoking history. A loss of LKB1 expression was more frequently associated with progression according to TNM staging, particularly more than T2, N progression. Conclusion: There was a significant relationship between the loss of the LKB1 protein and gender, smoking history, and histological type in primary lung cancer. Although LKB1 expression was not found to be a significant prognostic factor, further studies with a larger cohort of patient's lung cancer tissue samples will be needed to confirm this.

Main Causes of Delayed Marriage among Korean Men and Women; Contingent Joints of Status Homogamy, Gender Role Divisions, and Economic Restructuring (남녀 결혼시기 연장의 주요 원인: 계층혼, 성역할분리규범, 경제조정의 우발적 결합)

  • Park, Keong-Suk;Kim, Young-Hye;Kim, Hyun-Suk
    • Korea journal of population studies
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    • v.28 no.2
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    • pp.33-62
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    • 2005
  • This study aims to explain the current upheaval in marriage that many young Korean men and women postpone or deny their marriage. In order to explain the delayed marriage, we need to understand the taste by which men and women choose their partners, the opportunity by which they find their ideational half in reality, and the context in which these values and opportunities of marriages intersect. This study examines the way in which the value and opportunities of marriage among Korean men and women have intersected differently in the changing economic conditions. Using KLIPS(Korea Labor Income Panel Survey, 1998-2002), differential effects of education and occupational status on marital time according to marriage cohort and gender are analyzed. Results find that the opportunity of marriage among men turns out to have been stratified significantly according to their educational achievement and labor status since the 1990s. For women, education and economic activities are likely to influence marriage decision in a discordant way; during the period of 1990-997, highly educated women are more likely than their counterparts to be married earlier while there is no significant difference according to economic activities. This implies that status homogamy has been intensified since the 1990s and many women with high motivation for social status are able to achieve a vicarious social status through marriage in a prosperous economy. For women married after 1998, however, the educational effect is insignificant but economic activity contributes to delaying marriage. This suggests that under the economic restructuring since the late 1990s, the constraint of opportunities finding decent jobs particularly for men results in the contingent change in women's perception about family roles and economic activities by reducing their expectation to achieve a vicarious status through marriage, but increasing their motive for their own economic activities.