• The Korean Journal of Applied Statistics
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• v.28 no.6
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• pp.1113-1120
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• 2015

We propose a multi-proportions randomized response model by stratified simple random sampling for surveys of sensitive issues of a polychotomous population composed of several stratum. We also systemize a theoretical validity to apply multi-proportions randomized response model (Abul-Ela et al.' model, Eriksson's model) to stratified simple random sampling and derive the estimate and its dispersion matrix of the proportion of sensitive characteristic of population using the suggested model. Two types of sample allocations (proportional allocation and optimum allocation) are considered under the fixed cost. In efficiency, the Eriksson's model by stratified sampling are compared to the Abul-Ela et al.' model.

• The Journal of Korean Obstetrics and Gynecology
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• v.33 no.2
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• pp.90-111
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• 2020

Objectives: The purpose of this study was to analyze randomized controlled trials (RCTs) related to the effect and safety of Korean Traditional Medicine treatment for postpartum pain, and to suggest desirable future clinical research trend. Methods: Randomized controlled trials (RCTs) on postpartum pain were searched using domestic and foreign search engines to investigate the effect and safety of Korean Traditional Medicine on postpartum pain, and 12 studies were selected as a result. Results: There were 4 studies using Acupoint Therapy, 3 studies using Herbal Medicine, 3 studies using Using Acupoint Therapy and Herbal Medicine together, and 2 studies using Manipulative Therapy for postpartum pain. As control interventions, non-treatment, other Korean Traditional Medicine treatment, or Western medicine were used. All the studies reported a significant effect in experimental group compared to the control group, with no or minor side effects. Conclusions: Korean Traditional Medicine treatment showed effectiveness and safety for postpartum pain. In the future, it is necessary to eliminate the ambiguity of recruiting subjects and to study the most effective application method of Korean Traditional Medicine treatment for postpartum pain.

• The Korean Journal of Applied Statistics
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• v.30 no.2
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• pp.291-299
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• 2017

Mack and Skillings (1980) proposed nonparametric procedures in a randomized block design with replications as general alternatives. This method is used to find the difference in the treatment effect; however, it can cause a loss of inter block information using the ranking in each block. In this paper, we proposed new nonparametric procedures in a randomized block design with replications using an aligned method proposed by Hodges and Lehmann (1962) that used information of blocks and based on the joint placement suggest by Chung and Kim (2008). We also compared the power of the test of the proposed procedures and established a method through Monte Carlo simulation.

• Asian Pacific Journal of Cancer Prevention
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• v.14 no.2
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• pp.947-950
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• 2013

Background: We performed this meta-analysis to assess the effectiveness and safety of axillary dissection in old women. Methods: The Cochrane Library, PubMed, EMBASE and Chinese Biomedical Literature Database were searched and all randomized controlled trials of axillary dissection in old women (at least 60 years old) were considered. Meta-analyses were completed using RevMan5.1. Results: Three eligible randomized controlled trials (RCTs) including 5,337 patients were considered. There was weak evidence in favour of axillary dissection (AD) in old women. The meta-analysis showed that the overall survival (OS) after 1, 3, 5 and 7 years and the disease free survival (DFS) after 1, 3 and 5 year were not statistically significantly different between AD and no AD groups. However, there was a difference in the 7 year DFS. Conclusions: Axillary dissection did not provide survival benefit to the old women with breast cancer analysed. Therefore, axillary dissection is not well-indicated in old women with breast cancer.

• The Korean Journal of Applied Statistics
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• v.30 no.6
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• pp.931-941
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• 2017

Typical Nonparametric methods for randomized block design with replications are two methods proposed by Mack (1981) and Mack and Skillings (1980). This method is likely to cause information loss because it uses the average of repeated observations instead of each repeated observation in the processing of each block. In order to compensate for this, we proposed a test method using linear placement statistics, which is a score function applied to the joint placement method proposed by Chung and Kim (2007). Monte Carlo simulation study is adapted to compare the power with previous methods.

• The Journal of Korean Obstetrics and Gynecology
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• v.33 no.4
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• pp.113-126
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• 2020

Objectives: This study aimed to review randomized controlled trials on the effectiveness of korean medicine for chronic urinary tract infections. Methods: We analyzed the randomized controlled trials that intervented korean medicine treatment on chronic urinary tract infections retrieved using seven databases. Literature search was conducted on August 10, 2020. Results: Of the 188 studies searched, 8 studies were finally selected. In all studies, the treatment group was treated with korean medicine and the control group was treated with western medicine. Although the evaluation index was different for each study, all the indexes in the treatment group were significantly improved compared to the control group. Conclusions: Korean medicine treatment for chronic urinary tract infections had a significant effect compared to the western medicine treatment. Further high quality randomized controlled trials should be carried out to verify the strong evidence and safety of herbal medicine treatment.

• Journal of the Korean Data and Information Science Society
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• v.24 no.1
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• pp.95-103
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• 2013

Nonparametric procedure in randomized block design (RBD) was proposed by Friedman (1937) for general alternatives. Also Page (1963) suggested the test for ordered alternatives in RBD. In this paper, we proposed the new nonparametric method in randomized block design using aligned method suggested by Hodges and Lehmann (1962) and the joint placement described in Chung and Kim (2007). Also, Monte Carlo simulation study was adapted to compare the power of the proposed procedure with those of previous procedure.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.22 no.12
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• pp.64-70
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• 2008

In case that conventional PRC(Pseudo-Randomized Frequency Carrier) modulation scheme is applied to a three-phase HBML(H-Bridge Multi-Level Inverter), the dominant harmonics spectra appear at twice switching frequency. In this paper, the dominant harmonics spectra spreading effect of the conventional PRC scheme was improved by using three stage MUXs(Multiplexers) and two triangular carriers with fixed frequency which has mutual relation of the twice frequency. To confirm the validity of the improved PRC scheme, the experiment were performed on a 1.5[kw] three-phase HBML based induction motor drives. And, the harmonics spectra of the conventional and improved PRC schemes are compared and discussed.

• The Korean Journal of Applied Statistics
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• v.29 no.4
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• pp.707-717
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• 2016

Nonparametric procedures in a randomized block design was proposed by Friedman (1937) as a general alternative as well as suggested as a test for ordered alternatives by Page (1963). These methods are used for the rank of treatments in each block. In this paper, we proposed nonparametric procedures using aligned method proposed by Hodges and Lehmann (1962) to reduce among block information and based on placement suggested by Kim (1999) in a randomized block design. We also perform a Monte Carlo study to compare the empirical powers of the proposed procedures and established method.

• Journal of Oriental Neuropsychiatry
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• v.22 no.4
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• pp.31-39
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• 2011

Objectives : This study aimed to investigate frequently used herbal materials among herbal prescription for depression focusing on randomized controlled trial. Methods : Every article relevant to depression was initially obtained from China National Infrastructure(CNKI), Korean database and book hand-searching. Searching keywords were 'depression', 'herbal medicine' and 'randomized controllled trial(RCT)'. Results : Among comorbidity with depression, the most accompanied disease was that of circulatory system. Among sixty-five articles, depression with cerebral vascular disease was twenty-eight. Article about mood disorder was twenty-four. High frequently used herbal materials were Bupleuri Radix(41times), Curcumae Radix(34 times), Acori Graminei Rhizoma and Cnidii Rhizoma(24 times). Conclusions : According to this study, we could know select frequent-used herbal medicine. In a clinical treatment, herbal materials can be added herbal prescription related to depression. As these results, it can be helpful to develop new drugs.