• Journal of Ginseng Research
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• v.41 no.2
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• pp.222-226
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• 2017

Background: Long-term ginseng intake can increase longevity in healthy individuals. Here, we examined if long-term treatment with Panax ginseng Meyer (Korean Red Ginseng, KRG) can also enhance survival duration (SD) in patients with human immunodeficiency virus type 1 (HIV-1) infection. Methods: We retrospectively analyzed 252 HIV-1 patients diagnosed from 1986 to 2013 prior to the initiation of antiretroviral therapy. Overall, 162 patients were treated with KRG ($3,947{\pm}4,943g$) for $86{\pm}63$ mo. The effects of KRG on SD were analyzed according to the KRG intake level and the length of the follow-up period. Results: There were significant correlations between the total amount of KRG and SD in the KRG intake group (r = 0.64, p < 0.0001) as well as between total amount of KRG and mean annual decrease in $CD4^+$ T-cell count in all 252 patients (r = -0.17, p < 0.01). The annual decrease in $CD4^+$ T-cell count (change in $cells/{\mu}L$) was significantly slower in KRG-treated patients than in patients receiving no KRG ($48{\pm}40$ vs. $106{\pm}162$; p < 0.001). The SD (in months) was also significantly longer in the KRG group than in the no-KRG group ($101{\pm}64$ vs. $59{\pm}40$, p < 0.01). Conclusion: KRG prolongs survival in HIV-1 patients, possibly by slowing the decrease in $CD4^+$ T-cell count.

• Journal of Preventive Medicine and Public Health
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• v.55 no.5
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• pp.485-491
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• 2022

Objectives: Tuberculosis (TB) is a major public health concern worldwide. Social contact patterns can affect the epidemiology and risk of airborne diseases such as TB. This study was designed to investigate the social contact patterns associated with TB. Methods: In this case-control study, groups of participants with and without TB were matched by age and sex. Participants reported the nature, location, frequency, and average duration of social contacts over 1 month. The duration and number of social and spatial contacts were compared between groups using the chi-square test and the t-test. Odds ratios (ORs) with 95% confidence intervals (CIs) were used to quantify the relationship between social contact time and TB status. Data were analyzed using Stata version 11 statistical software. A p-value of <0.05 was considered to indicate statistical significance. Results: In this study, 80 patients with TB and 172 control participants were included, and a total of 3545 social contacts were registered. Social contact with family members (OR, 1.72; 95% CI, 1.10 to 2.40), contact with a person with TB (OR, 1.53; 95% CI, 1.16 to 2.01), and contact at the participant's home (OR, 1.42; 95% CI, 1.19 to 1.82) were significantly associated with TB status. Conclusions: The duration of long-term social contact, rather than the number of contacts, may be the main contact-related factor associated with TB transmission in this population. The focus of contact-tracing efforts should be on finding and treating both family members and long-term contacts in non-household settings.

• The Transactions of the Korea Information Processing Society
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• v.4 no.9
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• pp.2366-2377
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• 1997

An Adaptive Usage Parameter Control(UPC) mechanism using a Variable Token Pool(VTP) which is kind of preventive traffic control in the Asynchronous Transfer Mode(ATM) networks is described. The VTP mechanism can monitor violations of the average bit rate and burst duration as well as peak bit rate for the ON-OFF type traffic. The VTP can vary the token pool size by monitoring burst duration and silence duration for a long term. It also improves the sensitivity against the violation of burst duration and average bit rate and enables to response for the violating traffic situation quickly. The variable token pool size is varied in step size by every burst duration and silence duration. Two important parameters for controlling token pool size are Down_size and Up_size. We compare the performance of LB and JW mechanism with the proposed VTP mechanism by computer simulations. We have known that the proposed method is more effective than the previous mechanisms. It is shown that the cell loss rate of the VTP quite depends on the value of Down_size and Up_size. The two parameters should be decided as a propr value according to traffic situations.

• Journal of Labour Economics
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• v.27 no.3
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• pp.75-111
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• 2004

On the basis of data from the National Longitudinal Survey of Youth (NLSY), this paper investigates wage consequences of cumulative experience of job displacement. Unlike previous studies, we consider two measures of cumulative unemployment experience simultaneously: the total frequency and the cumulative duration of unemployment induced by job displacement. When frequency and cumulative duration compete in a wage equation, only cumulative duration remains significant for men, while only frequency matters for women. For men, a one-month increase in the cumulative duration of displacement-initiated unemployment leads to a fall in wages by 0.4 percent. This finding is quite robust with respect to various sample restrictions and/or estimation methods. For women, approximately a 2.5 percent wage reduction is associated with an additional event of displacement.

• The Journal of Pediatrics of Korean Medicine
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• v.18 no.2
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• pp.1-9
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• 2004

Objectives: The objective of this study is to assess the clinical effect of Gagamjeonsibaekchul-san on child diarrhea. Methods: This clinical study was carried out with 42 cases(31male, 11female) of children aged 0 to 14 years old who visited the Department of Pediatrics, Dongguk University Bundang Oriental Hospital and were diagnosed as the diarrhea. Assessments were made with reference to sex, age, the duration of symptoms and physical history. To assess the impact of Gagamjeonsibaekchul-san, the complicated signs, the duration of treatment, the correlation between the use of Gagamjeonsibaekchul- san, san and the duration of symptom were examined before and after the treatment. Results: There were 31 males and 11 females in the incidence by sex. It showed that males were more than females. The most numerous age group was 0-2(19) followed by 3-7 (11) and 9-12 (12). According to the duration of symptom, 12 children have symptom for 0-7 days, 10 for 8-14 days, 11 for 15-20 days, 4 for 22-28 days and 5 over 28 days. With regard to the physical history of the sample, 5 children had atopic dermatitis, 3 children had enteritis, 3 children had rhinitis, 2 children had tonsillitis, 1 child had otitis media, 1 child had asthma and 1 child had pneumonia. The children also had the complicated signs: 22 children had anorexia, 17 children had abdominal pain, 13 children had vomiting and 8 children had nausea in digestive organ. In addition 11 children had dizziness, 7 children had general weakness, 1 child had enuresis and 1 child had sweat in general symptoms. For the duration of the treatment, 14 children were treated for 7 days, 13 for 8-10 days, 8 for 11-14 days, 3 for 15-21 days, 2 for 22-28 days and 2 for 29-40 days. No distinct relationship between the use of Gagamjeonsibaekchul-san and the duration of the symptom was found. Conclusion: Gagamjeonsibaekchul-san is effective in the treatment of intestine mucous membrane and improves the function of digestive system. It is also an effective short-term treatment for child diarrhea.

• The Journal of Pediatrics of Korean Medicine
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• v.18 no.2
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• pp.11-11
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• 2004

Objectives: The objective of this study is to assess the clinical effect of Gagamjeonsibaekchulsan on child diarrhea. Methods: This clinical study was carried out with 42 cases(31male, 11female) of children aged 0 to 14 years old who visited the Department of Pediatrics, Dongguk University Bundang Oriental Hospital and were diagnosed as the diarrhea. Assessments were made with reference to sex, age, the duration of symptoms and physical history. To assess the impact of Gagamjeonsibaekchulsan, the complicated signs, the duration of treatment, the correlation between the use of Gagamjeonsibaekchul- san and the duration of symptom were examined before and after the treatment. Results: There were 31 males and 11 females in the incidence by sex. It showed that males were more than females. The most numerous age group was 0-2(19) followed by 3-7 (11) and 9-12 (12). According to the duration of symptom, 12 children have symptom for 0-7 days, 10 for 8-14 days, 11 for 15-20 days, 4 for 22-28 days and 5 over 28 days. With regard to the physical history of the sample, 5 children had atopic dermatitis, 3 children had enteritis, 3 children had rhinitis, 2 children had tonsillitis, 1 child had otitis media, 1 child had asthma and 1 child had pneumonia. The children also had the complicated signs: 22 children had anorexia, 17 children had abdominal pain, 13 children had vomiting and 8 children had nausea in digestive organ. In addition 11 children had dizziness, 7 children had general weakness, 1 child had enuresis and 1 child had sweat in general symptoms. For the duration of the treatment, 14 children were treated for 7 days, 13 for 8-10 days, 8 for 11-14 days, 3 for 15-21 days, 2 for 22-28 days and 2 for 29-40 days. No distinct relationship between the use of Gagamjeonsibaekchul-san and the duration of the symptom was found. Conclusion: Gagamjeonsibaeichul-san is effective in the treatment of intestine mucous membrane and improves the function of digestive system. It is also an effective short-term treatment for child diarrhea.

• International Journal of Highway Engineering
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• v.14 no.1
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• pp.85-94
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• 2012

The term "incident duration time" is defined as the time from the occurrence of incident to the completion of the handling process. Reductions in incident durations minimize damages by traffic accidents. This study aims to develop models to identify factors that influence incident duration by investigating traffic accidents on highways. For this purpose, four models were established including an integrated model (Model 1) incorporating all accident data and detailed models (Model 2, 3 and 4) analyzing accidents by location such as basic section, bridges and tunnels. The result suggested that the location of incident influences incident duration and the time of arrival of accident treatment vehicles is the most sensitive factor. Also, significant implications were identified with regard to vehicle to vehicle accidents and accidents by trucks, in night or in weekends. It is expected that the result of this study can be used as important information to develop future policies to manage traffic accidents.

• Korean Journal of Schizophrenia Research
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• v.24 no.2
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• pp.60-67
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• 2021

Objectives: The optimal duration of maintenance treatment for patients with first-episode schizophrenia (FES) remains unclear. We examined the first antipsychotic treatment duration and its association with re-initiation of treatment using a nationwide claim database. Methods: Data from the Health Insurance Review and Assessment Service database in South Korea for 2007-2016 were used. Linear regression analysis and Cox proportional hazard models were used to evaluate the associations between the duration of the first antipsychotic treatment, time to re-initiation of treatment, and occurrence of treatment re-initiation. Results: Of 30,143 patients with FES, 80.4% (n=24,231) received <2 years of the first antipsychotic treatment. In patients who discontinued treatment (n=23,030), the rate of treatment re-initiation was 74.2% (n=17,086). As the duration of the first antipsychotic treatment increased, the time to re-initiation of treatment decreased (β=-0.146, p<0.001); however, the rate of treatment reinitiation was relatively constant (hazard ratio=1.001, p<0.001). Conclusion: Long-term antipsychotic treatment was not significantly associated with the rate of treatment re-initiation but showed a negative association with the time to re-initiation of treatment. Further research is needed to better understand the optimal treatment duration for FES.

• Clinical and Experimental Pediatrics
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• v.53 no.7
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• pp.741-744
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• 2010

Purpose: To evaluate the long-term safety of polyethylene glycol (PEG) 4000 in children with constipation, particularly the biochemical aspects of safety. Methods: Medical records were evaluated, and 100 children, who had been taking PEG 4000 for more than 6 months, and who had been under clinical and biochemical monitoring, were enrolled. Ages; $6.11{\pm}3.12$ years, Duration of therapy; $16.93{\pm}7.02$ months, dose of PEG 4000; $0.72{\pm}0.21g/kg/d$. Results: None of the children complained of clinical adverse effect. The first biochemical test was performed at 8.05 months after beginning of PEG 4000. Serum phosphate (SP) value was high in 10 children, and leucopenia was noted in one child. The second test was performed in 44 children at 7.57 months after the first test. The SP value was high in four children, including the three children whose initial SP value was high and one new child. Six out of 10 children with high initial SP value became normal and one was lost. Hypernatremia was noted in one child. The third test was done in 15 children at 7.5 months after the second test. The SP value of the new child from the second test was high, but became normal after finishing treatment. Two out of 3 children with high SP value at the second test became normal and one was lost. The fourth test was done in 2 children few months after the third test. All of the results were normal. There were no relation between duration of therapy and hyperphosphatemia, or between dose of PEG 4000 and hyperphosphatemia. Conclusions: PEG 4000 is safe for long-term therapy in children with constipation with respect to biochemical parameters.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• v.3 no.1
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• pp.75-83
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• 2000

Cyclic vomiting syndrome(CVS) is a disorder of unknown etiology that is characterized by its clinical pattern of intermittent episodes of severe vomiting, similar in time of onset and duration, with no symptoms during the intervening period. By definition, CVS is an idiopathic disorder that requires exclusionary laboratory testing. Not only can it be mimicked by many specific disorders, eg, surgical, neurologic, endocrine, metabolic, renal, but within idiopathic CVS there may be specific subgroups that have different mechanisms. It has been reported that CVS usually begins in toddlers and resolves during adolescence. Migraine is also self-limiting episodic condition of children and the clinical features of migraine and CVS show considerable similarity. It is proposed that CVS is a condition related to migraine. This paper reports clinical courses of long term follow-up and reversible EEG changes in three patients whose history included CVS. Clinical situations of attack interval, duration and associated symptoms had changed variablely in each patients through long term follow-up period. Cyclic vomiting subsided in two cases. Abnormal delta activity was seen during episodes and resolved at follow-up, when the patient asymptomatic. The brain wave changes support the interpretation of CVS as a migraine variant.