• Journal of Preventive Medicine and Public Health
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• 제21권1호
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• pp.152-162
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• 1988

Benzene and toluene, which are widely used aromatic hydrocarbons in workplace, are recently proved to cause health hazards due to their toxic effects. This study investigated the influence of toluene on the urinary excretion of benzene metabolite by administering short term exposure limit(STEL) of these compounds(i.e., 13.8mg/kg of benzene and 108.8 mg/kg of toluene) intraperitoneally into Sprague-Dawley rats. After administration, urinary phenol concentration of rat was measured by gas chromatography for every three hours. Data were analyzed by non-parametric statistical methods using Kruskal-Wallis multi-sample test and Mann-Whitney U test. The following results were obtained : 1. Administration of STEL-benzene increased urinary phenol concentration in lats. 2. Urinary phenol concentration was increased logarithmically according to the dosage of benzene. 3. Excretion of phenol in urine was decreased when benzene and toluene were administered simultaneously compared with administering benzene alone. In summary, these results reveal that administration of STEL of toluene has antagonistic effect of urinary excretion of benzene metabolite in rats.

• 간호행정학회지
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• 제16권3호
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• pp.348-359
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• 2010

Purpose: This study aimed to evaluate the performance of Clinical Research Nurses (CRNs) and the importance of their roles at the Regional Clinical Trial Centers (RCTCs). Method: A questionnaire focused on the role of CRNs was crafted by a researcher and the content validity was verified by a panel of experts on clinical research. The subjects of this study were 91 CRNs and Clinical Research Coordinators (CRCs), who were Korean registered nurses working at nine RCTCs. 77 subjects yielded valid data were analyzed using descriptive analysis, the Mann-Whitney U test, Spearman's rank order correlation coefficient, and Kruskal-Wallis test. Results: The performance of CRNs and the recognition in the importance of their roles were statistically significant different in age, education, CRN careers, positions, employment status and the phase of clinical trial. The role of direct caregiver was performed most often by CRNs. The role of coordinator of care and research (pre-study) was considered the most important role but performed the least frequent. Conclusions: The role of CRNs can easily be differentiated from CRCs who are not registered nurses. The domains of CRNs should be clearly identified and established. Moreover, research should be carried out on CRN training programs to cultivate competence in CRNs.

• 종양간호연구
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• 제12권2호
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• pp.156-165
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• 2012

Purpose: This study was to identify predictors of sexual function in gynecologic cancer patients. Methods: The participants were 154 patients treated at a university medical center in A city, Korea. The data collection was performed through a structured questionnaire from July to December, 2010. The instruments used in this study were Female Sexual Function Index (FSFI) perceived health status scale, Eastern Cooperative Oncology Group (ECOG) performance status, body image, and depression. Data were analyzed using descriptive statistics, Mann-Whitney test, Kruskal-Wallis test and stepwise multiple regression with the SPSS 18.0. Results: The mean score of perceived health status was 8.42 and sexual function was 8.42. The lowest score among sexual function was lubrication. The scores of sexual function was significantly different by age, job, marital status, period after diagnosis of cancer and diagnosis. There were significant correlations between sexual function, perceived health status, ECOG performance, body image and depression. In multiple regression analysis, predictors were identified as ECOG performance, age, diagnosis and period after diagnosis of cancer (Adj.$R^2$=.28). The most powerful predictor of female sexual function was ECOG performance (19.0%). Conclusion: The above findings indicate that it is necessary to develop a more effective and personalized sexual function improvement program for gynecologic cancer patient.

• 한국학교보건학회지
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• 제27권2호
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• pp.90-99
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• 2014

Purpose: This study examined the levels of and the associations between middle school students' attachments to parents, peers, and teachers, truancy, and school bullying. Methods: Data on middle school student were obtained from the Korea National Children and Youth Survey 2010 (N=2,968). The independent t-test and Kruskal-Wallis test were conducted to examine the differences in truancy and school bullying according to the characteristics of students. Multiple stepwise regression analysis was conducted to identify the factors influencing school bullying. Results: The magnitude of the correlation between truancy and bullying was r=.34 (p<.001). Two types of attachment(to parents and to teachers) were associated with school bullying, with the magnitude of r=-.06 (p=.003) and r=-.09 (p<.001), respectively. Truancy and all three types of attachment (to parents, peers, and teachers) predicted school bullying significantly (F=27.84, p<.001). Conclusion: In this study, truancy had more influence on bullying behavior than attachments to parents, teachers and peers among middle school students. These results suggest there is need to develop and provide programs to prevent or early intervene in truancy, an important predictor of school bullying, to reduce school bullying among middle school students.

• 대한치과교정학회지
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• 제44권1호
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• pp.44-49
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• 2014

Objective: To evaluate the effects of ultrasonic instrumentation with different scaler-tip angulations on the shear bond strength (SBS) and bond failure mode of metallic orthodontic brackets. Methods: Adhesive pre-coated metallic brackets were bonded to 72 extracted human premolars embedded in autopolymerizing acrylic resin. The teeth were randomly divided into 3 groups (n = 24 each) to undergo no treatment (control group) or ultrasonic instrumentation with a scaler-tip angulation of $45^{\circ}$ ($45^{\circ}$-angulation group) or $0^{\circ}$ ($0^{\circ}$-angulation group). SBS was tested in a universal testing machine, and adhesive remnant index (ARI) scores were recorded. The Kruskal-Wallis test and Mann-Whitney U-test were used for statistical analysis. Results: The control group had a significantly higher mean SBS value than the treated groups, which showed no significant differences in their mean SBS values. The ARI scores were not significantly different among the groups. Conclusions: Ultrasonic instrumentation around the bracket base reduces the SBS of metallic orthodontic brackets, emphasizing the need for caution during professional oral hygiene procedures in orthodontic patients. The scaler-tip angulation does not influence the SBS reduction and bond failure mode of such brackets.

• Journal of Korean Dental Science
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• 제13권1호
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• pp.28-34
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• 2020

Purpose: The purpose of this study was to investigate the influence of different implant computer software on the accuracy of image registration between radiographic and optical scan data. Materials and Methods: Cone-beam computed tomography and optical scan data of a partially edentulous jaw were collected and transferred to three different computer softwares: Blue Sky Plan (Blue Sky Bio), Implant Studio (3M Shape), and Geomagic DesignX (3D systems). In each software, the two image sets were aligned using a point-based automatic image registration algorithm. Image matching error was evaluated by measuring the linear discrepancies between the two images at the anterior and posterior area in the direction of the x-, y-, and z-axes. Kruskal-Wallis test and a post hoc Mann-Whitney U-test with Bonferroni correction were used for statistical analyses. The significance level was set at 0.05. Result: Overall discrepancy values ranged from 0.08 to 0.30 ㎛. The image registration accuracy among the software was significantly different in the x- and z-axes (P=0.009 and <0.001, respectively), but not different in the y-axis (P=0.064). Conclusion: The image registration accuracy performed by a point-based automatic image matching could be different depending on the computer software used.

• The Journal of Advanced Prosthodontics
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• 제10권2호
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• pp.128-131
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• 2018

PURPOSE. This study aimed to evaluate the marginal discrepancy of full-arch frameworks in implant-supported prostheses fabricated using pre-sintered soft alloy (PSA). MATERIALS AND METHODS. Full-arch metal frameworks were fabricated on the edentulous implant model using casting alloy (CA), fully-sintered hard alloy (FHA), and PSA (n = 4 in each group). To evaluate the misfit of the framework to the abutments, the absolute marginal discrepancy (AMD) values of the frameworks were measured in cross-sectional images that had been drawn as part of the triple-scan protocol. The AMD values were compared among the tested alloy groups using the Kruskal-Wallis test, with a post hoc Mann-Whitney U test (${\alpha}=.05$). RESULTS. The FHA and PSA groups showed lower marginal discrepancies than the CA group (P<.001). However, the FHA group did not differ significantly from the PSA group. CONCLUSION. Soft alloy milling is comparable to hard alloy milling, and it is more precise than casting in terms of the marginal fit of implant-supported, full-arch prostheses.

• 한국전문물리치료학회지
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• 제10권2호
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• pp.1-10
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• 2003

This study was carried out to help the comprehensive rehabilitation of spinal cord injuries by measuring propulsion force and endurance exerted on wheelchair handrims, and predicting the differences among three different rear axle positions. The BTE (Baltimore Therapeutic Exerciser) work simulator was used on 9 paraplegia to test the force and endurance during wheelchair propulsion. The 141 large wheel of the BTE work simulator and a standard wheelchair with removed handrims were used for simulating wheelchair propulsion. The neurological and demographical characteristics of the patients were collected by personal interviews and direct examinations. The Kruskal-Wallis test was used to compare force and endurance among the groups. The strongest maximum isometric strength was produced when the rear axle of the wheelchair and the acromion process were on the same coronal plane. Although there were no significant differences statistically, moving the rear axle forward did result in greater isotonic strength. The research suggests that better functional activity of persons with paraplegia is possible when the rear axle of the wheelchair is appropriately adjusted.

• 성인간호학회지
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• 제29권2호
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• pp.166-176
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• 2017

Purpose: The study aimed to assess differences between nurses' and patients' perception of the communication skills to promote patients' health literacy in a hospital. Methods: The convenience sample consisted of 150 patients and 169 nurses in a university hospital. The data were collected from January to February 2014 using the Communication Skills Scale for Hospital nurses and patients. Descriptive statistics, independent t-test, ANOVA, Kruskal-Wallis test, and Lin's concordance were used to analyze the data. Results: There were significant differences (t=9.44, p<.001) between the perception of nurses ($8.18{\pm}2.00$) and patients ($5.49{\pm}2.95$) on the communication skills used by nurses. Most nurses ($3.87{\pm}0.39$) perceived that the communication skills were effective, but more patients ($4.13{\pm}0.62$) reported significantly higher scores (t=-4.34, p<.001). Conclusion: The results implied that nurses need to make sure that their communication skills are effective when they communicate with patients, and education programs for nurses to develop the advanced communication skills would be necessary.

• 한국치위생학회지
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• 제15권5호
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• pp.933-939
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• 2015

Objectives: This study aims to investigate the effect of job performance satisfaction and self-efficacy according to gender role identity in the dental hygienist. Methods: Data collection was performed from June 21 to July 31, 2015. The survey was composed of questions on the subject's general demographical profile, gender role identity, job satisfaction, job performace satisfaction, and self-efficacy as a dental hygienist. The job performance satisfaction and self-efficacy were done by Kruskal-Wallis test and Bonferroni post hoc test. Results: 1. The highest job performance satisfaction was shown as unclassified (36.6%), bisexuality (27.8%0, feminity (19.8%), and masculinity (15.9%). 2. There was a significant difference between the satisfaction as a dental hygienist and self-efficacy among the group (p<0.001). 3. Both female and male dental hygienists had the highest satisfaction and self-efficacy with the job performance. Conclusions: The satisfaction and self-efficacy with the job performance were influenced by gender role identity. Therefore, in order to enhance the satisfaction and self-efficacy as a dental hygienist, the education for the dental hygienist must include the gender role identity in the future.