• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.05a
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• pp.194-196
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• 2014

A Meta-analysis refers to a statistical literature synthesis method from the quantitative results of many known empirical studies. Recently, the convergence of knowledge-based society and e-commerce, information telecommunication technologies has a rapid impact on politics, economics and various fields. We conducted a meta-analysis and review of between satisfaction, trust and loyalty on e-commerce researches. This study focused a total of 57 research papers that established causal relationships in between satisfaction, trust and loyalty on e-commerce published in Korean academic journals during 2002 and 2013. The result of the meta-analysis might be summarized that the highest effect size in the path from the satisfaction to the trust with the effect size(0.591). Based on these findings, several theoretical and practical implications were suggested and discussed with the difference from previous researches.

• The korean journal of orthodontics
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• v.53 no.6
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• pp.374-392
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• 2023

Objective: Assess and evaluate the different indicators of oral health-related quality of life (OHRQoL) among patients treated with clear aligners (CAs) versus those treated with conventional fixed orthodontics (FAs). Methods: An electronic search was performed on the database is Web of Science, Scopus, and Embase databases. Randomized and non-randomized control trials, cross-sectional, prospective cohort and retrospective trials were included. Quality was assessed with risk of bias tool and risk of bias in non-randomised studies. Meta-analyses were performed with random effects models, estimating the standardized and non-standardized mean differences, odds ratio and risk ratio as the measure of effect. The effect on time was determined using a meta-regression model. Results: Thirty one articles were included in the qualitative synthesis and 17 in the meta-analysis. CAs had a significantly lower negative impact on QoL, with an "important" effect size, while the influence of time was not significant. Periodontal indicators plaque index (PI), gingival index (GI), probing depth (PD), and bleeding on probing show significantly better values in patients treated with CAs, with moderate to large effect sizes. PI and GI have a significant tendency to improve over time. In microbiological indicators, CAs present a lower biofilm mass without differences in the percentage of patients with high counts of Streptococcus mutans and Lactobacilli bacteria. The risk of white spot lesion onset is ten times lower in carriers of CAs. Conclusions: Patients wearing CAs show better periodontal indicators, less risk of white spot development, less biofilm mass and a better QoL than patients with FAs.

• Journal of Preventive Medicine and Public Health
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• v.56 no.2
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• pp.128-144
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• 2023

Objectives: The health system reform process is highly political and controversial, and in most cases, it fails to realize its intended goals. This study was conducted to synthesize factors underlying the failure of health system reforms. Methods: In this systematic review and meta-synthesis, we searched 9 international and regional databases to identify qualitative and mixed-methods studies published up to December 2019. Using thematic synthesis, we analyzed the data. We utilized the Standards for Reporting Qualitative Research checklist for quality assessment. Results: After application of the inclusion and exclusion criteria, 40 of 1837 articles were included in the content analysis. The identified factors were organized into 7 main themes and 32 sub-themes. The main themes included: (1) reforms initiators' attitudes and knowledge; (2) weakness of political support; (3) lack of interest group support; (4) insufficient comprehensiveness of the reform; (5) problems related to the implementation of the reform; (6) harmful consequences of reform implementation; and (7) the political, economic, cultural, and social conditions of the society in which the reform takes place. Conclusions: Health system reform is a deep and extensive process, and shortcomings and weaknesses in each step have overcome health reform attempts in many countries. Awareness of these failure factors and appropriate responses to these issues can help policymakers properly plan and implement future reform programs and achieve the ultimate goals of reform: to improve the quantity and quality of health services and the health of society.

• The Journal of Korean Medicine
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• v.41 no.1
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• pp.93-106
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• 2020

Objectives: The aim of this review is to ascertain whether Bojungikgi-tang and its modifications is more effective than non-specific management in chronic fatigue syndrome (CFS). Methods: We collected clinical trials to investigate the effects of Bojungikgi-tang and non-specific management on general symptoms, fatigue, and sleep quality in CFS patients. The databases used for data retrieval were Pubmed, Central Cochrane, CNKI, VIP, CiNii, OASIS, RISS, and Koreamed. We performed selection/exclusion process from the found records according to prespecified criteria, and assessed the final included trials according to the Cochrane risk of bias tool. The included studies were classified on the basis of interventions in experimental group. Results: Seven randomized controlled trials (476 participants) were eligible and their results were synthesized in the meta-analysis. The synthesis showed a substantial effect of Bojungikgi-tang (relative risk 0.20 [95% CI 0.13 to 0.31], Z=7.44, P<0.00001; I²=0%) and combination of Bojungikgi-tang and Sosiho-tang (relative risk 0.15 [95% CI 0.08 to 0.28], Z=5.85, P<0.00001; I²=0%) compared with non-specific management on improvement of general symptoms. However, we could not find sufficient clinical research records to determine their effects of improvement on fatigue and sleep quality. Conclusions: Bojungikgi-tang and its modifications are more effective than non-specific management for improvement of general symptoms in CFS post-treatment.

• The Journal of the Korea Contents Association
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• v.18 no.10
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• pp.298-305
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• 2018

The objective of this present study was to investigate the overall effects of strategy instruction on Korean students' English language learning. In order to do so, 55 individual experimental results in 46 journal articles were collected, and a meta-analysis was carried out to them. This study also analyzed the results of studies on strategy instruction according to various variables such as school types, treatment periods, and types of dependent variable. The mean effect size of strategy instruction in English language teaching is .536, which means the medium effects in general. No statistically significant differences were found among various moderators and dependent variables. Based on these results, suggestions for further research are discussed.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.24 no.2
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• pp.95-105
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• 2017

Purpose: A systematic literature review and meta-analysis were conducted to synthesis research findings on relationships of quality of life with multi-dimensional correlates in Korean breast cancer patients. Methods: For the study purpose, 18 studies were selected through a systematic process of searching the literature. Results: Among the general characteristics, variables having a significant relationship with quality of life were age (ES=.19), marital status (ES=.15), education (ES=.19), economic status (ES=.16), job status (ES=.10), and religion (ES=.13). Among the disease characteristics, type of treatment (ES=.12), length of time since diagnosis (ES=.13), stage of disease (ES=.14), length of time since operation (ES=.10), frequency of treatment (ES=.19), wound site and pain (ES=.16) were shown to have a significant relationship with quality of life. Depression (ES=-.60), one of the psychological factor, was the variable most significantly related to quality of life. Conclusion: The findings indicate that the variables which strongly impact quality of life in breast cancer patients are depression and pain.

• Journal of the Korean Society of Clothing and Textiles
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• v.37 no.3
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• pp.386-398
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• 2013

This study analyzes the effect of clothing involvement using meta-analysis. Metal-analysis (the analysis of analyses) is widely used in various academic areas to integrate individual empirical studies and generalize the knowledge of a specific research field. Previous studies regarding clothing involvement published since 1990 were researched from the KISS database using clothing involvement and fashion involvement as a keyword; subsequently, 127 articles were identified. Studies that had insufficient statistics or included clothing involvement as a moderating (or intervening variable) were eliminated; subsequently, 36 articles provided a total of 75 data sets that were used for the final analysis. Dependent variables were grouped into 10 categories to compare the differences between high and low involvement groups. The effect size of clothing involvement was large in non-personal information source; however, it was small in utility, brand royalty and quality. In the 7 categories of relational studies that showed homogeneity, the relation size regarding conformity was smaller than the personal information source.

• Journal of Korean Academy of Nursing
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• v.46 no.1
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• pp.1-18
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• 2016

Purpose: This study was conducted to synthesis the results of research on relationships of cognitive impairment with multi-dimensional correlates of rheumatic disease through a systematic literature review and meta-analysis. Methods: For the study purpose, 23 studies were selected through a systematic process of searching the literature. Results: The study results showed that among general characteristics, age and education were the variables having a significant relationship with cognitive impairment. Among health risk factors, obesity appeared to have a significant positive relationship with cognitive impairment. For past history, diabetes and hypertension were shown to have a significant positive relationship with cognitive impairment. It was noted also that aPL, one of the physiological factor, had significant association with cognitive impairment. None of the medication related factors had a significant relationship with cognitive impairment. Results showed that among disease related factors, disease activity had the highest relationship with cognitive impairment. Depression, among psychological factors, was the only variable having a significant relationship with cognitive impairment. Conclusion: The findings indicate that the variables strongly impacting on cognitive impairment in rheumatic disease are depression and disease activity.

• The Journal of Churna Manual Medicine for Spine and Nerves
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• v.16 no.2
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• pp.29-38
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• 2021

Objectives This study was aimed to evaluate the effects of Chuna manual therapy (CMT) for the treatment of cerebral palsy. Methods The randomized controlled trials (RCTs) on the treatment of CMT for cerebral palsy in children were selected among the literature published until January 2021 in seven databases. The quality of the literature was evaluated using the Cochrane's risk of bias tool, and RevMan 5.3 was used for the synthesis of results. Results Total 801 pediatric patient with cerebral palsy incontinence were finally selected from twelve RCTs. The total effective rate of the combined treatment general rehabilitation and CMT is statistically significantly higher (P<0.0001) than that of general rehabilitation alone. Conclusions This study suggests that general rehabilitation combined with CMT for cerebral palsy in children might be more effective in improving symptoms than general rehabilitation alone. As the number and quality of the literature included in the meta-analysis was insufficient, high-quality clinical studies on CMT for cerebral palsy would be required.

• Restorative Dentistry and Endodontics
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• v.47 no.3
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• pp.30.1-30.15
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• 2022

Objectives: This study aimed to evaluate the effectiveness of final irrigation with cold saline solution after endodontic treatment compared with saline solution at room temperature against postoperative pain following endodontic treatment. Materials and Methods: A broad search was performed in the PubMed, Web of Science, Scopus, Cochrane Library, Virtual Health Library (LILACS), and Grey Literature databases. Two independent reviewers performed data extraction, risk of bias using the Cochrane methodology, and certainty of evidence using the Grading of Recommendations, Assessment, Development and Evaluations (GRADE) approach. Results: Eight studies were included in qualitative synthesis. Intracanal cryotherapy favored the reduction of postoperative pain in the systematic review. Four studies were included in meta-analyses. The meta-analysis showed that intracanal cryotherapy reduced postoperative pain in teeth with symptomatic apical periodontitis (SAP) at 24 hours. There was no association between intracanal cryotherapy and control (room temperature) groups in teeth with normal periapical tissue with respect to postoperative pain at 24 hours and 48 hours. Conclusions: Intracanal cryotherapy was effective in reducing postoperative pain after endodontic treatment in teeth with SAP.