- An introduction to propensity score matching methods
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Lee DK
- KMID: 2358475
- Anesth Pain Med.
- 2016 Apr;11(2):130-148.
- doi: 10.17085/apm.2016.11.2.130
Propensity score matching method (PSM) is widely used in observational study to reduce selection bias. Observational study lacks randomization, hence, statistical inferences without bias adjustments usually include observed or unobserved... -
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- Randomization, What is the Proper Method?
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Hong JH, Yoo JC
- KMID: 2049400
- Clin Should Elbow.
- 2013 Jun;16(1):58-62.
PURPOSE: Among the numerous clinical researches and following articles, there are few cases that apply proper methodology, which guarantees high reliability. By understanding the right concept and randomization of proper... -
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- Cohort Study
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Yum YT, Kim SD
- KMID: 2304113
- Korean J Epidemiol.
- 1994 Jun;16(1):116-135.
The cohort study is an observational epidemiological study which selects the specific study population attempting to study the relatiqnship between an exposure to the purported cause and the subsequent risk... -
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- Equivalence Margin of the Biosimilar Product
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Lee H
- KMID: 2334513
- J Korean Soc Clin Pharmacol Ther.
- 2012 Jun;20(1):17-33.
The equivalence margin is the largest difference that is clinically acceptable between the test (or experimental) drug and the active control (or reference) drug. This paper discusses the scientific principles,... -
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- The Use of Propensity Score Matching for Evaluation of the Effects of Nursing Interventions
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Lee SJ, Yoo JS, Shin M, Park CG, Lee HC, Choi EJ
- KMID: 814182
- J Korean Acad Nurs.
- 2007 Apr;37(3):414-421.
BACKGROUND: Nursing intervention studies often suffer from a selection bias introduced by failure of random assignment. Evaluation with selection bias could under or over-estimate any intervention's effects. PS matching... -
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- Randomization in clinical studies
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Lim CY, In J
- KMID: 2454880
- Korean J Anesthesiol.
- 2019 Jun;72(3):221-232.
- doi: 10.4097/kja.19049
Randomized controlled trial is widely accepted as the best design for evaluating the efficacy of a new treatment because of the advantages of randomization (random allocation). Randomization eliminates accidental bias,... -
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- Cancer Screening in Korea I
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Seo HG
- KMID: 2064952
- J Korean Med Assoc.
- 2006 May;49(5):439-448.
- doi: 10.5124/jkma.2006.49.5.439
The proportion of cancer related mortality is 26.3% in 2004 and it is still increasing. The most common cancers are stomach cancer, lung cancer, liver cancer, colon cancer, breast cancer,... -
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- A method to evaluate scientific evidence in clinical preventive medicine
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Lee J, Park BJ
- KMID: 2342041
- J Korean Med Assoc.
- 2011 Oct;54(10):1006-1012.
Evaluation of scientific evidence in the medical literature is based on the research methodology, which can be the fundamental tool for medical professionals to improve their practice. Since analytic studies... -
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- A Review of Methods for Minimizing Selection Biases and Confounders in Observational Studies
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- KMID: 2299474
- Korean J Asthma Allergy Clin Immunol.
- 2012 Mar;32(1):8-13.
Although well-designed randomized controlled trials (RCTs) are the most scientifically rigorous method for testing a hypothesis and have held the uppermost position in the hierarchy of evidence- based medicine as... -
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- HCG therapy for extracanalicularly located testis
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Lee SH, Cho SR
- KMID: 2139529
- Korean J Urol.
- 1992 Jun;33(3):468-471.
Reported results of HCG treatment for cryptorchism are quite variable because many factors may influence the success of the therapy. It is possible that the anatomic stratification introduces an element... -
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- An introduction to systematic review
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Ahn HS, Kim HJ
- KMID: 2194834
- J Korean Med Assoc.
- 2014 Jan;57(1):49-59.
- doi: 10.5124/jkma.2014.57.1.49
Systematic review had become one of the important research area in medicine. Systematic review can be demonstrating benefit or harm of an intervention when results of individual studies are inconclusive.... -
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- Random allocation and dynamic allocation randomization
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Kang H
- KMID: 2388833
- Anesth Pain Med.
- 2017 Jul;12(3):201-212.
- doi: 10.17085/apm.2017.12.3.201
Random allocation is commonly used in medical researches, and has become an essential part of designing clinical trials. It produces comparable groups with regard to known or unknown prognostic factors,... -
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- Endoscopic submucosal dissection of gastric subepithelial tumors: a systematic review and meta-analysis
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Bang CS, Baik GH, Shin IS, Suk KT, Yoon JH, Kim DJ
- KMID: 2350975
- Korean J Intern Med.
- 2016 Sep;31(5):860-871.
- doi: 10.3904/kjim.2015.093
BACKGROUND/AIMS: To evaluate the therapeutic outcomes of the endoscopic submucosal dissection (ESD) technique for the treatment of gastric subepithelial tumors (SETs). METHODS: A systematic literature review was conducted using the core... -
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- Strengthening Causal Inference in Studies using Non-experimental Data: An Application of Propensity Score and Instrumental Variable Methods
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Kim MH, Do YK
- KMID: 792528
- J Prev Med Public Health.
- 2007 Nov;40(6):495-504.
- doi: 10.3961/jpmph.2007.40.6.495
OBJECTIVES: This study attempts to show how studies using non-experimental data can strengthen causal inferences by applying propensity score and instrumental variable methods based on the counterfactual framework. For... -
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- Development of disease-specific growth charts in Turner syndrome and Noonan syndrome
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Isojima T, Yokoya S
- KMID: 2400780
- Ann Pediatr Endocrinol Metab.
- 2017 Dec;22(4):240-246.
- doi: 10.6065/apem.2017.22.4.240
Many congenital diseases are associated with growth failure, and patients with these diseases have specific growth patterns. As the growth patterns of affected individuals differ from those of normal populations,... -
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- Methodological Assessment of Medical Records Reviews in Articles in the Journal of the Korean Society of Emergency Medicine
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Jeong H, Yu TY, Jin Y, Jeong TO, Lee JB
- KMID: 1583033
- J Korean Soc Emerg Med.
- 2005 Aug;16(4):481-485.
PURPOSE: The purpose of this study is to enhance the quality of data by performing a methodological assessment of medical records reviews. METHODS: We reviewed the articles published in the Journal... -
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- The Impact of Height, Weight and Body Mass Index(BMI) in Young Men with Varicoceles
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Liu C, Im JW, Seol SH, Jang YH, Park YW, Lee J, Min SK
- KMID: 2226614
- Korean J Androl.
- 2006 Dec;24(3):126-130.
PURPOSE: To assess the impact of physical characteristics on the incidence of varicoceles. Although previous reports have alluded to the fact that taller individuals may have a higher incidence of... -
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- Identifying Research Direction for Mental Health of North Korean Refugees Using Delphi Technique
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Noh JW, Kim HA, Kim Y, Park H, Woo JM
- KMID: 2351544
- J Korean Neuropsychiatr Assoc.
- 2016 Aug;55(3):185-193.
- doi: 10.4306/jknpa.2016.55.3.185
OBJECTIVES: Refugees from North Korea are at risk of a range of mental health problems, posing urgent problems to their care. A review of research on mental health prevalence and... -
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- How to Deal with the Latency of Unobtainable Responses in the Statistical Analysis
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Pyun SB, Kwon HK, Lee HJ
- KMID: 2323141
- J Korean Acad Rehabil Med.
- 1998 Oct;22(5):1056-1059.
OBJECTIVE: To evaluate the usability of near-nerve needle recording techniques in cases of unrecordable sensory nerve action potentials (SNAPs) with a surface electrode and to determine a proper alternative value... -
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- The Influence of Explaining Risk on Parents' Decision to Participate Their Child in Clinical Studies
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Lee MG, Kim KO, Kim CS, Kim SD
- KMID: 2299072
- Korean J Anesthesiol.
- 2004 Jun;46(6):670-674.
- doi: 10.4097/kjae.2004.46.6.670
BACKGROUND: The participation of children in clinical research requires parental permission. We designed this study to evaluate the extent to which the risk associated with a clinical study affects the... -
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