• The Korean Journal of Nuclear Medicine Technology
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• v.16 no.2
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• pp.49-56
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• 2012

Purpose : Gated myocardial perfusion SPECT provides not only myocardial perfusion status, but various functional parameters of left ventricle (LV). The purpose of this study was to analyze ejection fraction (EF) for correlation and difference between $^{201}Tl$ gated myocardial perfusion SPECT and echocardiography depending on extent of perfusion defect, gender and LV volumes. Materials and Methods : From April 2011 to May 2012, we analyzed 291 patients (male:female =165:126; mean: $64.6{\pm}10.8$ years) who were examined both $^{201}Tl$ gated myocardial perfusion SPECT and echocardiography at less than 7 days apart in our hospital. 101 patients showed perfusion defect and the rest of the people without any defect. We applied automatic analysis (Quantitative gated SPECT, QGS), and calculated EF, End-diastolic volume (EDV) and End-systolic volume (ESV) from Stress (G-Stress) and Rest (G-Rest) studies. And we analyzed the correlation and difference for EF between $^{201}Tl$ gated SPECT and echocardiography. Results : The correlation of LVEF among G-Stress, G-Rest and echocardiography was quite a good (G-Stress vs. G-Rest: r=0.909, G-Stress vs. echocardiography: r=0.833, G-Rest vs. echocardiography: r=0.825). And there were significant differences in EDV, ESV and EF in total patients (p<0.01). The normal group showed significant difference in EF (p<0.01) and the group with perfusion defect also demonstrated significant difference (a group with reversible defect: p<0.01, fixed defect: p<0.01) depending on extent of perfusion defect. We analyzed difference in normal group by gender. In normal group, there was no significant difference (p>0.05) in EF from men. However, there was a significant difference (p<0.01) from women. When we classified two groups by average size of EDV in Korean women, there was no significant difference in a group of above average size of EDV (p>0.05). Conclusion : When compared among Stress and Rest of $^{201}Tl$ gated SPECT and echocardiography, we confirmed that there was a good correlation for LVEF. But there were significant differences among three studies. And extent of perfusion defect, gender and LV volumes are independent determinants of the accuracy of LVEF. So, it is hard to compare and interchange quantitative indices among modalities. We should take additional researches to prove results of our study.

• The Korean Journal of Nuclear Medicine Technology
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• v.13 no.3
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• pp.67-75
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• 2009

Purpose: As to the analytical method of data, the various programs in which it is used for the quantitative rating of the Tl-201 myocardial perfusion SPECT are reported that there is a difference. Therefore, the measured value error of the mutual program is expected to be generated even if the quantitative analysis is made against data of the same patient. Using quantitative index that able to represent myocardial perfusion defect level, we aimed to determine correlation among three myocardial perfusion analysis programs 4DM (4DMSPECT), QPS (Quantitative Perfusion SPECT), ECT (Emory Cardiac Toolbox) that be used generally in most departments of Nuclear Medicine. Materials and Methods: We analyzed the 145 patients who were examined by Tl-201 gated myocardial perfusion SPECT in department of nuclear medicine at Asan Mediacal Center from December 1th 2008 to February 14th 2008. We sorted as normal group and abnormal group. Normal group consist of 80 patients (Male/Female=38/42, age:$65.1{\pm}9.9$) who have low possibility of cardiovascular disease. And abnormal group consist of 65 patients (Male/Female=45/20, age:$63.0{\pm}8.7$) who were diagnosed cardiovascular disease with reversible perfusion defect or fixed perfusion defect through myocardial perfusion SPECT results. Using the 4DM, QPS, and ECT programs, the total defect extent (TDE) such as LAD, LCX, RCA and the summed stress score (SSS) have been analysed for their correlations and statistical comparison with the paried t-test for the quantitative indices analysed from each group. Results: The correlation of 4DM:QPS, QPS:ECT, ECT:4DM each group result from 145 patients is 0.84, 0.86, 0.82 at SSS, 0.87, 0.84, 0.87 at TDE, and both index showed good correlation. In paired t-test and Bland-Altman analysis results showed no statistically significant difference in the comparison of QPS:ECT at the mean SSS and TDE, 4DM:QPS, ECT:4DM comparative analysis results showed statistically significant difference at SSS and TDE index. The correlation of 4DM:QPS, QPS:ECT, ECT:4DM program results from abnormal group (65 patients) is 0.72, 0.72, 0.70 at SSS and 0.77, 0.70, 0.77 at TDE and TDE and SSS has a good correlation. In abnormal group, paired t-test and Bland-Altman analysis results showed no statistically significant difference at QPS:ECT SSS (p=0.89) and TDE (p=0.23) comparison, 4DM:QPS, ECT:4DM comparative analysis results showed statistically significant difference at SSS and TDE index (p<0.01). In normal group (80 patients), paired t-test and Bland-Altman analysis results showed no statistically significant difference at QPS:ECT SSS (p=0.95) and TDE (p=0.73) comparison. And 4DM:QPS, ECT:4DM comparative analysis results showed statistically significant difference at SSS and TDE index (p<0.01). Conclusions: The perfusion defect of the Tl-201 myocardial perfusion SPECT was analyzed in not only the patient in whom it has the cardiovascular disease but also the patient in whom the possibility of the cardiovascular disease is few. In the comparison of the all group research, the mean of the TDE and SSS, 4DM was lower than QPS and ECT progrms. Each program showed good correlation and the results showed statistically significant difference. However, in this way, it is determined to be compatible about the analysis value in which the large-scale side between the programs uses each program a difference in a clinical in the Bland-Altman analyzed result in spite of the good correlation and cannot use. but, this analyzed result will be able to be usefully used as the reference material for the clinical read and is expected.

• Korean Journal of Veterinary Research
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• v.12 no.1
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• pp.21-24
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• 1972

In native and Saanen goats, the thyroidal iodine uptake rate and its correlation between thyroidal activity and body gain were studied. The results were as follows: 1. The thyroidal iodine-131 uptake rate in native and Saanen goats were 10.46% and 21.26%, respectively, and the difference was statistically significant (P<0.01). 2. The correlation coefficients between monthly body gain and thyroidal iodine-131 uptake rate were -0.32 and -0.46 in native and Saanen goats, respectively. The correlations were negative and not significant between the rates.

• Journal of the Korean Home Economics Association
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• v.17 no.4
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• pp.15-22
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• 1979

This paper was studied changes of physical properties of Lining fabrics by washing and difference between dry method. I experimented four kinds of Lining fabrics for the sample . The analysis was performed by correlation coefficient analysis and significance tested between correlation coefficients. The results are summarized as follows : 1) Increasing rate of shrinkage tends to call high density and weight. 2) Rayon fabrics is shown the most high rate of shrinkage and decreasing strength by increasing washing times. 3) Drip dry makes little change of physical properties. 4) Polyester fabrics is little by washing times and dry method.

• Proceedings of the Korea Electromagnetic Engineering Society Conference
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• 2000.11a
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• pp.16-19
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• 2000

We propose a deterministic vector channel simulation model satisfying not only rigorous temporal correlation but also arbitrary spatial correlation using the method of Doppler phase difference sampling. The model is more efficient than the conventional PN filtered Gaussian model with coloring process in evaluating the laboratory performance of mobile communication systems employing adaptive way antennas or space diversity.

• Proceedings of the Korean Statistical Society Conference
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• 2005.05a
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• pp.53-57
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• 2005

In this paper, we develp the group ordering referecne priors for the differecne of the intraclass correlation coefficient in familial data. Using marginal posterior distributions under those priors, we compare frequentist coverage probabilities.

• Journal of Korean society of Dental Hygiene
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• v.11 no.2
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• pp.213-222
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• 2011

Objectives : The purpose of this study is to arrange basic data necessary for education of AIDS and to prevent AIDS on undergraduates' knowledge or attitude toward AIDS. Methods : A self-administered questionnaire survey was used among 350 undergraduates in some of Jeonbuk and Gyeongnam area from September 9, 2009 to December 10, 2009 and then obtained the following results. Results : 1. Information route on AIDS was indicated to be higher in order of school education with 37.1% and TV & newspaper with 31.5% as for the health-related department. The health-unrelated department was indicated to be the highest in TV & newspaper with 67 people(43.8%), and had statistically significant difference(p<0.01). 2. The whole knowledge score on AIDS was indicated to be $12.72{\pm}2.67$ for the health-related department, resulting having been higher than the health-unrelated department with $11.84{\pm}3.30$. There was significant difference(p<0.01). The attitude score on AIDS was indicated to be $4.85{\pm}1.67$ for the health-related department, resulting having been higher than the health-unrelated department with $4.38{\pm}1.58$. There was significant difference(p<0.01). 3. Knowledge and attitude toward general AIDS stood at r=.112(p<0.05), thereby having had positive correlation. Knowledge and attitude toward AIDS infection stood at r=-.220(p<0.01), thereby having had negative correlation. Relationship between the whole knowledge and attitude toward AIDS stood at r=-.105(p<0.05), thereby having had negative correlation. Conclusions : AIDS is exponentially increasing in the whole world and is getting more serious. Even in our country, it is the tendency that the infected are gradually increasing. Health care of AIDS, which is impossible to be fully recovered and has no vaccine, is preferential to prevent infection. A continuous and efficient preventive education program is thought to be necessary for straightening wrong knowledge and prejudice on this by grasping right knowledge and attitude toward AIDS.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.2
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• pp.554-561
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• 2012

The purpose of this study was to identify the relationship between anxiety, anger and fatigue among stress factor in clinical practice of nursing students. The subjects were 197 nursing students who have practiced at the hospital in T city. Data was analyzed by using descriptive statistics, ANOVA, t-test and pearson's correlation coefficient. The mean score for stress was 3.82. The mean score for anxiety was 48.82. The mean score for anger was 1.17. The mean score for fatigue was 30.96. The factor of stress was a significant difference of anxiety according to conference, theory and practice, satisfaction of clinical practice. The factor of stress was a significant difference of anger according to report, theory and practice, orientation, nurse, environment. The factor of stress was a significant difference of fatigue according to conference, orientation, environment, patient relationship. In results, This study revealed that there was a significant correlation among stress, anxiety, anger and fatigue of nursing students in clinical practice.

• The Journal of Korean Society for School & Community Health Education
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• v.13 no.3
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• pp.113-125
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• 2012

Objectives: This study was aimed to inspect what relation there exists between the elderly's social support, self-esteem and the suicidal thinking, and examined factors influencing their suicidal ideation. Methods: For 207 old persons above 65 residing at Seoul, questionnaire survey was performed for 4 weeks. For response data, t-test and ANOVA, Pearson's Correlation Coefficient and Multiple Regression Analysis were performed using spss 18.0 program. Results: The results of analysis are like followings. 1. As for the social support according to the general characteristics, there was statistically significant difference in sex distinction, religion, living arrangement, educational level, monthly allowance and mode to use spare time. As for self-esteem according to the general characteristics, there was statistically significant difference in sex distinction, religion, living arrangement and monthly allowance. And as for the suicidal ideation, there was statistically significant difference in the marital status. 2. As for the relation between the social support, self-esteem and the suicidal ideation, it showed statistically very significant positive correlation in the social support and self-esteem. And there existed relatively higher positive correlation in family support among sub-factors of the social support and the positive self-recognition among sub-factors of self-esteem. 3. It showed that positive and negative self-recognition as sub-factors of self-esteem, others' support as sub-factor of the social support influence on the suicidal ideation. In other words, as positive self-recognition was lower, as negative self-recognition was higher, as social support of others was lower, they had much more effect on the suicidal ideation of the elderly. And it showed about 36.1% of the explanatory capability. Conclusions: Health care providers should develop school health education for the elderly.

• Korean Journal of Occupational Health Nursing
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• v.21 no.2
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• pp.77-86
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• 2012

Purpose: The purpose of this study is to identify nursing professional values and job satisfaction depending on the types of personality in visiting nurses. Methods: Two hundred twenty six visiting nurses participated in this study. Data collection was conducted in 26 Public Health Centers in Korea. The Korean version of the Enneagram nursing professional values and job satisfaction was used to measure the nursing professional values and job satisfaction. Results: The most common personality is type 9, a center of the Instinctive Center where energy tends to stress outwards. There was a significant difference in nursing professional values depending on the type of personality. The type 1, 2 and type 9 had a significant difference by depending on the type of personality. There was but no difference in job satisfaction. There was a negative correlation between nursing professional values and job satisfaction by depending on the type of personality. The nurses with the type 9 and type 1 of personality showed a significant differences with the negative correlation between professional values and job satisfaction. Conclusion: The findings of this study showed the necessity of a self-understanding program to improve the working efficiency by increasing the professional values and job satisfaction of visiting nurses.