• Korean Journal of Exercise Nutrition
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• v.23 no.1
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• pp.36-47
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• 2019

[Purpose] We conducted a meta-analysis to evaluate the effects of Taekwondo training on the physical fitness factors in Korean elementary students comprehensively and quantitatively. [Methods] We classified research studies published until November 2018 according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines and selected a total of 17 research items; a meta-analysis of these items was then conducted. We used the Comprehensive Meta-Analysis 3.0 and Review Manager 5.3 to analyze the mean effect size, study quality, and publication bias. [Results] Taekwondo training improved the cardiopulmonary endurance, muscle endurance, and power of the elementary students, but was not practical or less useful on other physical fitness factors. The meta-regression analysis of the cardiopulmonary endurance and power items showed that the effect size was large when the sample size was small. Therefore, it is necessary to consider the sample size in interpreting the effect size for these two items. Further, during correction of the publication bias for the power items, the improvement effect by Taekwondo training was eliminated. [Conclusion] Taekwondo training is helpful for improving the cardiopulmonary endurance and muscle endurance of Korean elementary students but is not useful for other physical fitness factors.

• Clinical Nutrition Research
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• v.13 no.1
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• pp.74-87
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• 2024

Since the effects of cinnamon supplementation on lipid profiles are still controversial, this study conducted a meta-analysis of randomized controlled trials to assess the effect of cinnamon supplementation on lipid profiles. The study was designed and conducted according to the guidelines of the 2020 preferred reporting items for systematic reviews and meta-analysis (PRISMA) statements. A systematic and comprehensive search was performed in several databases from inception up to 11 November 2023. The meta-analysis on the impact of Cinnamon on lipid profiles indicates a non-significant overall effect on low-density lipoprotein (weighted mean differences [WMD], -2.48; 95% confidence interval [CI], -9.70, 4.72). However, significant reductions are seen with doses < 500 mg/day (-10.26), and non-significant increases with doses ≥ 500 mg/day (1.18). The overall effect on high-density lipoprotein is non-significant (WMD, 3.97; 95% CI, -7.877, 15.831), showing varying responses at different doses. Triglycerides exhibit a significant overall reduction (WMD, -6.88; 95% CI, -12.62, -1.15), particularly in the < 500 mg/day group. The overall effect on cholesterol is non-significant (WMD, -4.314; 95% CI, -15.011, 6.384), with diverse responses at different doses. High heterogeneity underlines the importance of standardized study designs and further exploration of dosage-specific effects. Findings from this study suggest that cinnamon supplements might be beneficial to modulate the blood lipid profile.

• Journal of the Korea Society of Computer and Information
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• v.22 no.4
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• pp.115-122
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• 2017

The purpose of this study was to evaluate the effect of job satisfaction on turnover intention and organizational commitment in nurses through a systematic literature review and meta-analysis. For the study purpose, 26 studies were selected through a systematic process of using several databases and used to estimate the effect size of correlation between 3 variables. Meta-analysis was applied by usingcrandom effects model, and effect sizes on three types were calculated. Results are as follows. First, the effect size of correlation between job satisfaction and turnover intention is -.58. Second, the effect size of correlation between job satisfaction and organizational commitment is .77. Third, for the organizational commitment and turnover intention relationship, the effect of correlation is -0.68. Furthermore, publication bias analysis were assessed the results by using the funnel plot, Egger's regression test, fail-safe N, and trim-and-fill test. Based on these results, implications for the study were discussed.

• Knowledge Management Research
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• v.19 no.4
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• pp.1-17
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• 2018

Hotel consumers tend to rely on online reviews to reduce the risk to hotel products when they book hotel rooms because hotel products are high-risk products due to their intangibility. However, the development of ICT has caused information load, and it is an important issue to be perceived as useful information to consumer because a large amount of information complicates the decision making process of consumers. Drawn from Heuristic-Systematic Model(HSM), the present study explored the role of heuristic and systematic cues composing an online review influencing consumers' perception of hotel online reviews. More specifically, this study identified reviewers' identity, level of the reviewer, review star ratings, and attached hotel photo as heuristic cue, while review length, cognitive level of review and negativity in review as systematic cues. The binary logistic regression was adopted for analysis. This study found that only systematic cues of online review were found to affect the usefulness of it. Moreover, we preceded further study examining the moderating effect of seasonality in the relationships between systematic cues and usefulness.

• International Journal of Advanced Culture Technology
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• v.10 no.4
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• pp.67-76
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• 2022

This study aimed to guide the practice of group art therapy among Korean college students through a systematic review. Therefore, 164 studies relevant to group art therapy for Korean undergraduate students published in Korea from January 2001 to June 2021 were selected. This systematic review included 46 publications based on the PICO standards. The author systematically reviewed the included studies, summarized the characteristics and therapy effectiveness, and analyzed the overall research trends. The primary findings were as follows: First, the number of publications on group art therapy among Korean college students has significantly increased. According to a review of group art therapy characteristics, the majority of studies enrolled 6-10 participants (32 studies, 66.7%), applied 6-10 sessions (23 studies, 47.9%), and had an intervention time for each session of 90 minutes (25 studies, 53.2%). Second, research outcomes of group art therapy among Korean college students were grouped into self-related, society-related, emotion-related, and career-related outcomes. Regarding career-related outcomes, all studies found that group art therapy had a statistically significant impact on career-related outcomes, particularly on the levels of career decision-making and maturity. Most studies suggested that group art therapy had a positive effect on self-related, society-related, and emotion-related outcomes, with 6 studies finding no statistically significant effect of group art therapy on college students. Third, the most effective intervention for college students was the media-based group art therapy. In particular, college students had the most effective performance in career-related outcomes. This study is significant in that it uses a systematic review to integrate and summarize research results on group art therapy among college students over the last 20 years. This study revealed that group art therapy could positively and effectively affect Korean college students. Based on this systematic review, we expect to practice and develop group art therapy in Chinese college students with comprehensive guidance and convincing data.

• Women's Health Nursing
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• v.19 no.3
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• pp.129-141
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• 2013

Purpose: The purpose of this study was to determine the current state of nursing intervention for maternal adaptation and its' effectiveness in Korea by utilizing a systematic review. Methods: The PICO(Population-Intervention-Compar ator-Outcome) strategy was established, and 1,720 pieces of literature published during the last ten-year period from four electronic databases were reviewed. Eighteen references that met inclusion and exclusion criteria were finally selected for systematic review. The quality of references using critical appraisal checklist for experimental studies were evaluated, and then systematic review and meta-analysis were conducted. Results: All 18 references were quasi-experimental research design. Most interventions were provided at the hospital and postpartum care center. Maternal adaptation interventions appeared to be of many types, and particularly maternal role education programs were the most common. Confidence in maternal role was used as the most common variable for the maternal adaptati on. Various interventions for helping maternal adaptation in the postnatal period improved maternal confidence, moth er-infant attachment, maternal satisfaction and mother-infant interaction effectively. Conclusion: A diversity of nursin g interventions in postnatal period improved various aspects of maternal adaptation. Randomized controlled trials and longitudinal studies are needed in order to verify the effect of interventions for maternal adaptation more clearly.

• Journal of Korean society of Dental Hygiene
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• v.20 no.3
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• pp.257-268
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• 2020

Objectives: This purpose of this study was to examine the trends in interventional research and analyze the contents and results of intervention through a systematic literature review of the domestic research literature, suggesting the effect of an oral care program on elementary school students. Methods: A total of 262 articles were retrieved initially, and the duplicate articles were then removed, excluded after screening titles, abstracts, and full-text articles. Finally, a total of 16 papers were used in the review. Results: The study included 9 articles with the nonequivalent control group pretest-posttest design and 7 with the one-group pretest-posttest design. All articles were of non-randomized studies. The most common index of the interventional effect was dental plaque. Further, oral health behaviors and knowledge, perception, self-efficacy, and DMFT index were common indices. In the quality assessment, in the "blinding of outcome assessment" among six items of ROBANS, 12 studies showed a high risk of bias. Conclusions: In order to develop an interventional oral health care program for elementary school students and evaluate the effectiveness, a strict research design and qualitative improvement of research reports are required, and continuous research should be conducted to develop a systematic protocol.

• Journal of Pharmacopuncture
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• v.25 no.3
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• pp.186-198
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• 2022

Objectives: This overview summarizes the evidence for the effectiveness and safety of complementary therapies for insomnia through systematic reviews (SRs) and meta-analyses (MAs). Methods: A comprehensive literature search on SRs and MAs for complementary therapies for insomnia was conducted using six databases. Results: This overview included 30 SRs/MAs. The Pittsburgh Sleep Quality Index (PSQI) analysis of insomnia included 383 randomized controlled trials and 31,748 participants. Twenty-four SRs/MAs (80%) out of 30 SRs/MAs reported a positive result, and six SRs/MAs reported a partially positive result. The most frequently used form of acupuncture reported a positive effect in 89.5% (17/19) of SRs/MAs and a superior effect to western medicine, sham/placebo, and no treatment. The lack of protocol registration and the excluded studies list resulted in generally poor methodological and reporting quality in SRs/MAs with AMSTAR 2. Conclusion: This overview confirmed that complementary therapies positively affected the PSQI scores in patients with insomnia. However, better-designed primary studies are needed to strengthen the relevant evidence in the future. A more stringent assessment of multiple systematic reviews 2 must be followed when performing SR and MA.

• Restorative Dentistry and Endodontics
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• v.48 no.4
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• pp.34.1-34.12
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• 2023

This systematic review aimed to investigate whether minimally invasive root canal preparation ensures higher fracture resistance compared to conventional root canal preparation in endodontically treated teeth (ETT). A comprehensive search strategy was conducted on the "PubMed, Web of Science, and Scopus" databases, alongside reference and hand searches, with language restrictions applied. Two independent reviews selected pertinent laboratory studies that explored the effect of minimally invasive root canal preparation on fracture resistance, in comparison to larger preparation counterparts. The quality of the studies was assessed, and the risk of bias was categorized as low, moderate, or high. The electronic search yielded a total of 1,767 articles. After applying eligibility criteria, 8 studies were included. Given the low methodological quality of these studies and the large variability of fracture resistance values, the impact of reduced apical size and/or taper on the fracture resistance of the ETT can be considered uncertain. This systematic review could not reveal sufficient evidence regarding the effect of minimally invasive preparation on increasing fracture resistance of ETT, primarily due to the inherent limitations of the studies and the moderate risk of bias.

• Journal of Korean Medicine Rehabilitation
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• v.27 no.3
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• pp.47-60
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• 2017

Objectives The aim of this research is to assess the effects of bee venom acupuncture for knee osteoarthritis. Methods For a systematic review, we constructed a key question as the effect of bee venom acupuncture for knee osteoarthritis and selected RCTs and nRCTs. We searched the following 15 databases without a language restriction: Pubmed, EMBASE, Cochrane CENTRAL (CENTRAL), CINAHL, AMED, seven Korean medical databases (KoreaMed, Kmbase, KISS, NDSL, KISTI, Koreantk, OASIS) and three Chinese databases including CNKI, Wanfang and VIP database. Results A total of 300 potentially relevant studies were identified; only 13 studies were selected for systematic review. Almost studies showed that bee venom acupuncture has significant effect on knee osteoarthritis. 5 studies comparing bee venom acupuncture with acupuncture were included in the meta-analysis. The effect size of standardized mean difference (SMD) was analyzed as 'small effect' with 0.47 (95% CI: 0.10~0.83, Z=2.49, p=0.01). Conclusions The research showed that bee venom acupuncture can significantly reduce pain, stiffness and improve the quality of life of patients with knee osteoarthritis. However, most of the studies included in the analysis were evaluated as methodologically high risk of bias. This suggests that there is limitation applying this study. In the future, more Randomized Controlled trial should be actively conducted.