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Effect of the Number of Projected Images on the Noise Characteristics in Tomosynthesis Imaging

Fukui R, Matsuura R, Kida K, Goto S

Purpose: In this study, we investigated the relationship between the noise characteristics and the number of projected images in tomosynthesis using a digital phantom. Methods: The digital phantom consisted of a...
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Association between Sleep Duration and Hand Grip Strength in Korean Elderly

Lee HN, Shim KW, Lee SW, Lee HS, Cho YK, Byun AR

Background: In an aged society, studies on sleep duration and hand grip strength are limited. This study aimed to evaluate the associations of sleep duration and hand grip strength among...
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Inter-eye Difference of the Intraocular Lens Power Calculation in a Case with Bilateral Posterior Keratoconus

Lee WJ, Kim M, Chun YS, Kim KW

Purpose: To report a case with bilateral circumscribed posterior keratoconus with different results of refractive error between eyes after cataract surgery. Case summary: A 57-year-old man was referred for decreased...
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Comparison of the Accuracies of Intraocular Lens Power Formulae by the Type of Implanted Lens

Choi JJ, Kim HK, Yi K

Purpose: We compared the accuracies of formulae used to calculate intraocular lens (IOL) powers when predicting postoperative refraction, by the type of lens. Methods: We retrospectively reviewed the medical records of...
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Prediction of Effective Lens Position by Reference to the Preoperative Axial Length

Kim GH, Whang WJ, Kim HS

Purpose: We derived optimal formulae permitting effective lens position (ELP) for patients differing in terms of their preoperative axial lengths as revealed by partial coherence interferometry. Methods: We included 736 eyes...
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Intraocular Lens Power Calculation Using Shammas-PL Formula after Laser In-situ Keratomileusis

Park SY, Kwag JY, Choi JS, Pak KH, Chung SK

Purpose: To calculate the intraocular lens (IOL) power using the Shammas-PL formula after laser in-situ keratomileusis (LASIK). Methods: Forty-one eyes of 29 patients that had undergone cataract surgery from September 2018...
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General considerations for sample size estimation in animal study

Ko MJ, Lim CY

The aim of this paper is to introduce basic concepts and methods for calculating sample size in animal studies. At the planning stage of clinical studies, the determination of the...
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The Effects of Social Participation Attitude, Social Support, and Empowerment on Ageism Experience in the Elderly Using Welfare Centers

Kim DR, Ryu JH, Moon HW, Min SH, Jeong IY, Park SS, Lee GR

Purpose: This study was conducted to investigate the factors affecting the discrimination of the elderly using welfare centers. Methods: A cross-sectional study was conducted with 217 elderly people from a...
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Clinical Reliability of the Topolyzer Vario Instrument for Measurement of Corneal Refractive Power

Surl D, Jun I, Lee HK, Kim EK, Seo KY, Kim TI

Purpose: To evaluate the clinical reliability of the Topolyzer Vario (Wavelight-Alcon, Erlangen, Germany), we compared threedifferent corneal topographers in terms of corneal refractive power. Methods: The medical records of patients who...
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Debris removal efficiency depend on different ultrasonic irrigation protocols

Heo G, Kim JW, Cho KM, Enkhbileg N, Lee EH, Park SH

Purpose: The purpose of this study is comparing the efficiency of debris removal of passive ultrasonic irrigation depend on different protocols. Materials and Methods: Forty-eight mandibular premolars were randomly divided...
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Efficacy of Portable Low Power Laser Therapy on Pain and Functions in Chronic Low Back Pain

Cho YW, Kim TH, Lim OK, Lee JK, Park KD

Objective: A prospective, assessor-blinded, randomized controlled trial was conducted in patients with chronic low back pain to evaluate the efficacy of portable low power laser therapy (LPLT) and the effect...
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Tips for troublesome sample-size calculation

In J, Kang H, Kim JH, Kim TK, Ahn EJ, Lee DK, Lee S, Park JH

Properly set sample size is one of the important factors for scientific and persuasive research. The sample size that can guarantee both clinically significant differences and adequate power in the...
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Data transformation: a focus on the interpretation

Lee DK

Several assumptions such as normality, linear relationship, and homoscedasticity are frequently required in parametric statistical analysis methods. Data collected from the clinical situation or experiments often violate these assumptions. Variable...
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Factors Affecting New Graduate Nurses' Intention on Retention in Hospitals: Focused on Nursing Organizational Culture, Empowering Leadership and Organizational Socialization

Kim EG, Jung MS, Kim JK, You SJ

PURPOSE: The purpose of this study was to investigate relationships among intention of retention, nursing organizational culture, empowering leadership and organizational socialization of new graduate nurses, and identify factors affecting...
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Comparison of Three Formulas for Intraocular Lens Power Formula Accuracy

Lee KW, Kim J, Kim DH

PURPOSE: To compare the accuracy of three intraocular lens (IOL) power calculation formulas (SRK/T, Barrett Universal II, and T2) in cataract surgery patients. METHODS: In total, 73 eyes of 73 patients...
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More about the basic assumptions of t-test: normality and sample size

Kim TK, Park JH

Most parametric tests start with the basic assumption on the distribution of populations. The conditions required to conduct the t-test include the measured values in ratio scale or interval scale,...
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Investigating the Impact of Establishing Integrated Management Systems on Accidents and Safety Performance Indices: A Case Study

Laal F, Pouyakian , Madvari RF, Khoshakhlagh AH, Halvani GH

BACKGROUND: Increasing the establishment of integrated management systems (IMSs) is done with the purpose of leaving traditional management methods and replacing them with modern management methods. Thus, the present study...
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Effects of the Empowering Leadership by Nurse Managers on Organizational Citizenship Behavior of Nurses: Mediating Effects of Followership

Kim KH, Kim EK

PURPOSE: The objective of this study was to verify a mediating effect of followership in the relationship of organizational citizenship behavior and nurse managers' empowering leadership as perceived by nurses. METHODS:...
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The Effects of a Support Program for Family Caregivers of Elderly with Dementia on Empowerment and Attitudes toward Dementia

Kim SY, Jeong S

PURPOSE: This research was conducted to identify the effects of providing support programs to families of elderly with dementia on family empowerment and attitudes toward dementia. METHODS: A nonequivalent control group...
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Effect of Head Nurses' Authentic Leadership on Nurses' Job Satisfaction and Nursing Performance: Focusing on the Mediating Effects of Empowerment

Kim MJ, Han JY

PURPOSE: The purpose of this study was to explore the effects of head nurses' authentic leadership and empowerment on job satisfaction, and nursing performance of nurses and to identify the...
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