• The Journal of Korean Academy of Prosthodontics
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• v.38 no.1
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• pp.38-49
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• 2000

The purpose of this study was to evaluate the effects of thermocycling on the shear bond strength of Co-Cr alloy to denture base resin. PMMA denture base resin such as heat-cured $Vertex-RS^{(R)}$, self-cured $Vertex-SC^{(R)}$ and 4-META denture base resin such as heat-cured $Meta-Dent^{(R)}$, self-cured $Meta-Fast^{(R)}$ was bonded to Co-Cr alloy. Samples were divided into 3 groups : no thermocycling group as control, thermocycling between $5^{\circ}C\;and\;55^{\circ}C$ with 15 second dwell time as group 1, thermocycling with 1 minute dwell time as group 2. The shear bond strength was measured and the interface between metal and resin was observed by SEM. The results were as follows. 1. The shear bond strength decreased significantly according to thermocycling and dwell time(P<0.001). 2. The bond strength of Co-Cr alloy and 4-META denture base resin was significantly higher than that of Co-Cr alloy and PMMA denture base resin(P<0.001) 3. In SEM, there was no gap in control group, but there was much and large gap in group 1, 2. The longer dwell times, the lower bond strength. PMMA denture base resin had more gap than 4-META denture base resin in the interface. These results revealed that thermocycling decreased the bond strength between Co-Cr alloy and denture base resin and dwell time of thermocycling changed the effect of thermocycling. The results suggested that oral temperature change affect the bond strength of prosthesis.

• The Journal of the Korea Contents Association
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• v.15 no.10
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• pp.205-213
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• 2015

This study was to examine the effectiveness of Positive Psychology Group Program in Korea by using method of meta-analysis. For the purpose of the study, master's theses, doctoral dissertations, and journal articles published in Korea up to June, 2015 were systematically reviewed. As a result, a total of 26 studies were eligible for the inclusion criteria. The mean effect sizes and test for homogeneity of effect size(Q-statistic) were analyzed by using Comprehensive Meta-Analysis software 2.0. The main findings of the study were as follows. First, the average effect sizes for Positive Psychology Group Program were ES=2.078 of happiness, ES= 1.847 of psychological well-being, ES= 1.645 of positive affect, ES=1.407 of life satisfaction ES=1.289 of self-esteem and ES=-1.208 of depressive symptoms. Second, the moderate variables of the effect size for Positive Psychology Group Program was 'age' of 'psychological well-being' and 'depressive symptoms'. Based on the study results, the research and practice implications were discussed.

• Asian Pacific Journal of Cancer Prevention
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• v.14 no.8
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• pp.4785-4790
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• 2013

Background and Objectives: Evidence for associations between alcohol consumption with breast cancer survival are conflicting, so we conducted the present meta-analysis. Methods: Comprehensive searches were conducted to find cohort studies that evaluated the relationship between alcohol consumption with breast cancer survival. Data were analyzed with meta-analysis software. Results: We included 25 cohort studies. The meta-analysis results showed that alcohol consumption was not associated with increased breast cancer mortality and recurrence after pooling all data from highest versus lowest comparisons. Subgroup analyses showed that pre-diagnostic or post-diagnostic consumpotion, and ER status did not affect the relationship with breast cancer mortality and recurrence. Although the relationships of different alcohol consumption with breast cancer mortality and recurrence were not significant, there seemed to be a dose-response relationship of alcohol consumption with breast cancer mortality and recurrence. Only alcohol consumption of >20 g/d was associated with increased breast cancer mortality, but not with increased breast cancer recurrence. Conclusion: Although our meta-analysis showed alcohol drinking was not associated with increased breast cancer mortality and recurrence, there seemed to be a dose-response relationship of alcohol consumption with breast cancer mortality and recurrence and alcohol consumption of >20 g/d was associated with increased breast cancer mortality.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.05a
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• pp.134-137
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• 2016

Big data analysis refers the ability to store, manage and analyze collected data from an existing database management tool. In addition, extract value from large amounts of structured or unstructured data set and means the technology to analyze the results. Meta-analysis is a statistical integration method that delivers an opportunity to overview the entire result of integrating and analyzing many quantitative research results. Meta-analysis is sometimes expressed as an analysis of another analysis. Commonly, factors of metabolic syndrome can be defined as abdominal obesity, high triglycerides, low high density lipoprotein cholesterol, elevated blood pressure, and elevated fasting glucose. This study will find meaningful mediator variables for criterion variables that affect before and after the metabolic syndrome studies, on the basis of the results of a meta-analysis. We reviewed a total of 5 studies related to metabolic syndrome published in Korea between 2000 and 2016, where a cause and effect relationship is established between variables that are specified in the conceptual model of this study.

• Annals of Hepato-Biliary-Pancreatic Surgery
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• v.27 no.1
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• pp.20-27
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• 2023

There are many variations and unclear definitions of the appropriate timing of laparoscopic cholecystectomy (LC) after endoscopic retrograde cholangiopancreatography (ERCP), and there is still a lack of consistency about the appropriate timing. Inappropriate timing can be associated with serious comorbidity and can affect the patients. This meta-analysis was conducted to assess the operative outcomes and morbidity to provide a benefit to the patients based on the best timing of LC after ERCP. Randomized controlled trials (RCTs) and retrospective studies were identified from the PubMed and Scopus databases from inception to July 2021. A meta-analysis was performed to estimate the treatment effects on operative outcomes and morbidity. Four RCTs and four retrospective studies met our inclusion criteria. A meta-analysis indicated that patients who received LC after ERCP on the same day or within 72 hours had about 0.354 days shorter length of hospital stay with a shorter operative time of about 0.111-1.835 minutes and a lower risk of complications around 37%-73%. Our evidence suggests that the appropriate timing of LC after ERCP is either the same day or within 72 hours for treating cholelithiasis patients based on the severity of disease.

• Women's Health Nursing
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• v.21 no.4
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• pp.342-354
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• 2015

Purpose: The purpose of this study was to test the effect size of intervention programs for married immigrant women as well as to suggest the basic data for health care practices for married migrant women. Methods: Meta-analysis was conducted with 27 articles from domestic Korea master's and doctorate degree dissertations and Korea academic journals from 2007 to 2014. Results: Overall average effect size was 1.17 and 'parental education' of Intervention Variables was the biggest effect size. Intervention Variables were also identified to be the most desirable in cases when total sessions were applied with 10-18 sessions, 1 session per week, 90-120 minutes per session activity time and with less than 10 subjects in group size. Regarding effect variables, psychological variable group was identified to show the biggest effect size and in sub-variables, self-efficacy was identified to show the biggest effect size. Conclusion: If intervention programs for married immigrant women is expanded and conducted based on the results of this study, the program would have significant affect psychological, social and physical health of the married migrant women who currently occupy the important status in our society.

• Physical Therapy Rehabilitation Science
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• v.12 no.2
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• pp.115-122
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• 2023

Objective: A previous study reported that cardiovascular training (CT) decreased interleukin-6 (IL-6), a pro-inflammatory cytokine with bidirectional effects. However, because of conflicting results of increasing and decreasing IL-6 levels in stroke patients, it is essential to clarify the effects of CT on IL-6 levels in this population. Therefore, this review aimed to investigate the effects of CT on IL-6 levels in stroke patients through a meta-analysis of randomized controlled trials (RCTs), synthesizing and analyzing the effects qualitatively and quantitatively. Design: A systematic review and meta-analysis of randomized controlled trials. Methods: In this review, conducted in April 2023, electronic databases (Web of Science, CINAHL, Embase, MEDLINE, Google Scholar) were searched to ascertain the effects of CT on IL-6 levels in stroke patients. For qualitative evaluation, ReVMan, provided by the Cochrane Group, was used, and for quantitative evaluation, a random-effects model and SMD (Standardized Mean Difference) were used. Results: Three RCTs measured IL-6 in 117 patients with stroke. The experimental group to which CT was applied showed no significant change compared to the control group.The result of analysis using the random effect model is SMD=-0.23; 95% confidence interval, -0.66 to 0.20. Conclusions: CT does not affect IL-6 levels in stroke patients. These results suggest that CT can be applied regardless of its positive or negative effect on IL-6 levels in stroke patients.

• Journal of The Korean Society of Integrative Medicine
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• v.9 no.1
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• pp.203-217
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• 2021

Purpose: The purpose of this meta-analysis was to examine the high-level evidence of the effects of manual therapy on musculoskeletal diseases. Methods: Domestic databases were searched for studies that conducted clinical trials associated with manual therapy on chronic musculoskeletal diseases. A total of 591 studies published between 2005 and 2018 were identified, with 18 studies satisfying the inclusion data. The studies were classified according to patient, intervention, comparison, and outcome (PICO). The search outcomes were items associated with pain and physical function. The 18 studies included in the study were evaluated by using the R meta-analysis (version 4.0). The quality of 18 randomized control trials was evaluated by using the Cochrane risk of bias (ROB). The effect sizes were computed as the corrected standardized mean difference (SMD). Subgroup and meta-regression analyses were also used. Egger's regression test was carried out in order to analyze the publication bias. Cumulative meta-analysis and sensitivity analysis were also conducted in order to analyze the data error. Results: The following factors showed the large effect size of manual therapy on chronic musculoskeletal diseases: pain (Hedges's g = 2.66; 95% CI = 1.47 ~ 3.85), and physical function (Hedges's g = 2.15; 95% CI: 1.22 ~ 3.08). The subgroup analysis only showed a statistical difference in the type of manual therapy (pain) and outcome (physical function). No statistically significant difference was found in the meta-regression analysis. Publication bias was found in the data, but the results of the trim-and-fill method showed that such bias did not largely affect the obtained data. Furthermore, there were no data errors in the cumulative meta-analysis and sensitivity analysis. Conclusion: This study provides evidence for the effectiveness of manual therapy on chronic musculoskeletal diseases in pain and physical function. Subgroup analysis suggests that only the type of manual therapy for pain and the type of outcome for physical function differed in effect size.

• Journal of Korean Elementary Science Education
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• v.20 no.1
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• pp.1-7
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• 2001

The purpose of this study is to examine the learner's variables affecting on scientific thinking and scientific process skills. To study this purpose, through the procedure study, the learner's variables were divided into cognitive variable, ego variable, and affective variable, then the questionaire survey through the reconstruction of standardization instrument was made over 120 elementary school fifth grade student in Seoul, Anyang, and Pajoo. The results of this study were as follows: 1) The learner's variables affecting on scientific thinking were cognitive variable and for female students, also affect affective variable. The subordinated catagories of statistically significant degree of explanation were achievement motivation, cognitive level, and cognitive style and another statistically significant correlation were meta-cognition, self regulated learning, self efficacy, and muliple intelligence. 2) The learner's variables affecting on science process skills were cognitive variable and affective variable. And the subordinated catagories of statistically significant degree of explanation were achievement motivation, and cognitive level. And another statistically significant correlation were meta-cognition, self regulated loaming, self efficacy, multiple intelligence, and attribution.

• The Journal of Society for e-Business Studies
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• v.5 no.1
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• pp.159-192
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• 2000

In spite of seemingly conflicting findings, a meta-analysis of studies published between 1971 and 1998 demonstrates an unambiguous relationship between attitude and IS use. The apparent contradictions arise principally because of methodological inconsistencies in the way that attitude was measured (belief or affect) and the timing of the measurement of attitude vis-5-vis the use of the technology. We found that the affective dimension of attitude is more powerful than the cognitive dimension for explaining IS use. However, neither is particularly strong in predicting future use.