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Relationship between Periodontal Disease and Chronic Kidney Disease: A Systematic Review of Cohort Studies (치주질환과 만성신장질환의 연관성: 코호트 연구에 대한 체계적 고찰)

  • Lee, Eun-Sun;Do, Kyung-Yi
    • Journal of dental hygiene science
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    • v.17 no.2
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    • pp.160-167
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    • 2017
  • The purpose of this systematic review was to investigate the association between periodontal disease and chronic kidney disease. A search of Embase, PubMed and The Cochrane Library databases was performed up to April 17, 2016. Article selection was based on cohort study design and the study subjects were patients with periodontal disease or severe periodontal disease. The final result was development of chronic kidney disease and kidney function decrease based on the estimated glomerular filtration rate values. The quantitative synthesis of the final selected articles was assessed using Review Manager statistical analysis software. A fixed-effects model meta-analysis was performed to estimate the degree of association between periodontal disease and chronic kidney disease. The search strategy identified 3,018 potentially eligible articles, of these, four studies were finally selected for meta-analysis, revealing that periodontal disease was significantly associated with the risk of developing chronic kidney disease (odds ratio, 1.65; 95% confidence interval, 1.44~1.90; p<0.001). In order to prevent the development of chronic kidney disease and kidney function decrease it is important to prevent periodontal disease, as well as minimizing the traditional risk factors known to reduce the quality of life of patients and increase disease burden.

The Effects of Coordinated Upper-limb Postures of Back, Shoulder, and Elbow Flexion Angles on the Subjective Discomfort Rating, Heart Rate, and Muscle Activities

  • Kong, Yong-Ku;Lee, Soo-Jin;Lee, Kyung-Suk;Seo, Min-Tae
    • Journal of the Ergonomics Society of Korea
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    • v.30 no.6
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    • pp.695-703
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    • 2011
  • Objective: This study was to investigate the effects of coordinated upper-limb body postures on the subjective discomfort rating, heart rate, and muscle activities. Background: Although generally many checklists such as OWAS, RULA, and REBA were applied to evaluate various body postures, the body postures were might be overestimated or underestimated because each body part(i.e., back, shoulder, and elbow etc.) was evaluated separately, and then added all rates of individual body parts to assess an overall risk level for the body posture in these methodologies. Methods: A total of 20 participants maintained 14 postures which were combinations of back, shoulder, and elbow flexion angles and then muscle activities, subjective discomfort, and heart rates were collected every three minute during a sustained 15 minute and 0.5kg weight holding task. Four muscle groups were investigated: erector spine, anterior deltoid, upper trapezius, triceps brachii. Results: Results showed that subjective discomfort was the lowest when the angle of back and shoulder were both $0^{\circ}s$, while the body posture with $45^{\circ}$ of back angle and $45^{\circ}$ shoulder angle was rated as the most subjective discomfort posture. In general, the subjective discomfort ratings increased as back and shoulder flexion angles increased. It was noted that, however, the subjective discomfort of body posture with a $45^{\circ}$ back angle and $45^{\circ}$ shoulder flexion angle was lower than that of body posture with a $0^{\circ}$ back and $45^{\circ}$ shoulder flexion angle. The research findings of heart rates and muscle activities showed similar results for the analyses of subjective discomfort ratings. Conclusions: The possible limitations of the current ergonomics evaluation techniques which assessing a body posture with summing all body part score after individually analyzed in this study. Based on the analyses of subjective discomfort, heart rate, and muscle activities, it was recommended that a use of effects of coordinated upper-limb body postures would be considered when one evaluates work-load for various working postures. Application: These findings can be used for developing a more accurate assessment checklist for working posture as well as preventing musculoskeletal disorders of workers in workplaces.

No Associations between Schizophrenia and D22S280 Marker on Synapsin III Gene in Korean Males (한국인 남자에서 Synapsin III 유전자의 D22S280 표지자와 정신분열병의 연합연구)

  • Lee, Yu-Sang;Park, Chong-Won;Lee, Seung-Yeoun;Lee, Suk-Jin;Park, Yong-Bum;Shin, Yoon-Sik;Yoo, Jang-Keun;Hong, Kyung Sue;Yang, Byung-Hwan
    • Korean Journal of Biological Psychiatry
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    • v.13 no.4
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    • pp.260-266
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    • 2006
  • Objectives : Synapsin III near VCFS region on chromosome 22q affects. It could be an interesting candidate gene for schizophrenia. D22S280 is a highly polymorphic genetic marker residing in synapsin III. We examined association of D22S280 marker on synapsin III with Korean patients with schizophrenia. Methods : The subjects were 46 male Korean patients with schizophrenia and 60 male normal controls. Using polymerase chain reaction, gel electrophoresis, ABI 310 genetic analyzer, and GeneScan Collection 3.1 software, we confirmed genotypes of D22S280 marker. We examined Hardy-Weinberg equilibrium and case-control association using SAS/Genetic 9.1.3. Results : Genotypes of both schizophrenia and control groups were in Hardy-Weinberg equilibrium. We could not find any significant statistical differences in allele-wise(${\chi}^2$=10.4, df=6, p=0.098) and genotype-wise (${\chi}^2$=22.1 df=19, p=0.258) analyses of D22S280 marker between schizophrenia and normal controls. Individual allele analyses with df=1 showed significant differences in A1(p=0.025) and A7(p=0.034) allele, which were not significant following Bonferroni corrections(A1:p=0.177, A7:p=0.235). Conclusion : We couldn't find any association between schizophrenia and the synapsin III gene. Given the small number of subjects studied, further investigations are needed.

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An Ethnographic Research Study on Childbearing Process of Mother with Children in Korea (자녀를 둔 어머니의 출산과정 경험)

  • Kim, Young-Hee
    • Women's Health Nursing
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    • v.7 no.3
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    • pp.271-283
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    • 2001
  • The childbearing process is a sociocultural phenomenon of a woman who gives birth to a child as well as a biological phenomenon. The purpose of this ethnographic research study was to explore the experience of childbearing process of mothers with children from pregnancy to the 3 months postpartum in Korea and to understand deeply the perspectives of childbearing women reflected on Korean sociocultural values. A convenient sample of 10 childbearing women were observed from January to October 2000 through field work in Seoul, Korea. Data analysis was accomplished under ongoing process. The results of this study were as follows : The mothers with children experienced self-reflection, family relation, and physical adaptation during pregnancy. In self-reflection, all mothers experienced universality and diversity in their self-discovering process. The universal experiences were maturation, life with family and priority on maternal value between being a mother and a woman. The diverse experiences were taking a dual role of working mother, emotional drift of a resigned mother, and disheartened life of a mother who has two daughters. In family relation, the foundation of the new marital relationship were attained during childbearing process and sexual life were changed for the benefit of a healthy mother and a healthy baby. All mothers established friendly relations with their mothers, but established friendly or conflicting or constraining relations with their mother-in-laws due to husband based family culture. In physical adaptation, the informants endured well the physical discomfort and recognized general appearance change. Also maternal-fetal interaction occurred and mothers realistically felt motherhood and accepted themselves as mother-to-be. The mothers prepared for the best delivery, look for a safe childbirth center, newborn goods, endorsed family coping during hospitalization and responded labor pain to make it more endurable, less painful, fast passed owing to labor recognition of the natural process to be a mother. After childbirth, they felt emancipation, satisfaction, accomplishment, more easiness, actually feeling as mother-to-be, emptiness, and showed response to the sex of newborn. Their Sanhujori practice was different according to the Sanhujori environment including provider, place, time in postpartum and reflected on Sanhubyung. The mothers felt actually mother-to-be and happiness during lactation regardless of feeding pattern. These mothers had a different maternal image about rearing subjecthood through their child-rearing experience. But all mothers felt need for family support and social support. The universal rearing response were actual feeling of mother-to-be, a strenuous experience, a pride on child-rearing, confusion, reflecting marital relationship, and wondering rivalry among children. In conclusion, mother of all with children went through self-discovery, self-reflection and made connections with the family as a mother and as a woman simultaneously during the childbearing process. Therefore it is suggested when harmony and balance between a mother and a woman is accomplished, the woman will lead a healthy and high quality of life. Also, this study sought to confirm the sociocultural factors affecting the childbearing process from the perspectives of the women with children. Therefore health care providers must understand deeply the childbearing women with children based on this finding of and try a integrative approach with new ideology of maternity with biocultural perspectives in a clinical setting.

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A Study on Women's Level of Educational Need & Knowledge about Routine Episiotomy and the Degree of Discomforts and Pain after Episiotomy (일상화된 회음절개술에 대한 여성의 지식, 교육요구, 불편감 및 통증정도에 관한 일 연구)

  • Yoo, Eun-Kwang;Kim, Jin-Hee
    • Women's Health Nursing
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    • v.7 no.3
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    • pp.393-406
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    • 2001
  • The purpose of this study was to find out women's need and level of knowledge about episiotomy, pain and discomfort related to episiotomy on a cross-sectional survey design. The subjects were 102 postpartal women agreed on oral consent. 34 postpartal women admitted at obstetric ward of H university hospital, 34 postpartal women admitted at 2 Sanhujoriwons, and 34 women within one year afterbirth. They were selected in Seoul, Korea. Data were collected from July, 1 to September 30, 2000, by a structured questionnaire. The instrument used for this study was a questionaire consisted of 5 items of general characteristics, 12 items of obstetric characteristics, 10 items of level of knowledge (Chronbach $\alpha$ .8176), 8 items of need of education(Chronbach $\alpha$ .8836), 3 items of pain (Chronbach $\alpha$ .9252), and 3 items of discomfort (Chronbach $\alpha$ .8092). The data were analyzed by the SPSS/PC+ program using t-test, ANOVA and Scheffe test as a post hoc and Pearson Correlation Coefficient. The results of the study were as follows; 1. 63.2% of respondents had right answer on 6-8 items among 10 items. Only 4.4% of women got right answer on 10 items all. 2. The need of education was high(4.45%) on all items and the range of score was $4.25{\sim}4.64$. 3. The strength of pain was the highest within one week afterbirth(5.93/10) and became lower in 8-14 days afterbirth(2.55). And after 15days of postpartum, the pain level became to the lowest level(1.08). However, pain was delayed until more than one month afterbirth. 4. The level of discomfort was the highest one week afterbirth(6.88/10) and became lower in 8-14 days afterbirth(4.20). And after 15days of postpartum, the discomfort level became to the lowest level(2.47). Universally, the degree of discomfort was higher than pain. 5. There was a strong positive correlation between discomforts and pain ($r=.752^{**}$) and weak positive correlation between discomforts and the level of educational need($r=.308^*$). In conclusion, women have a right to choose whether she will have episiotomy or not according to her decision making based on the comprehensive knowledge of episiotomy before they get episiotomy with consent process and explanation in detail. Women health care providers like nurses have a responsibility to do conscious raising and empowerment for women so that they could lead themselves to choose given medical treatments for women's health and wellbeing and the quality of life in her life cycle.

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A Study on Primiparous Husband's State Anxiety, Perceived Support and the Perception of Childbirth Experience (초산모 남편의 상태불안, 지지정도와 출산경험 지각에 관한 연구 -산전 라마즈 분만교육 참여군과 비참여군 간의 비교-)

  • Jeon, Myung-Hwa;Yoo, Eun-Kwang
    • Women's Health Nursing
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    • v.10 no.1
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    • pp.51-58
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    • 2004
  • Purpose: To compare the difference of state anxiety, perceived support, and childbirth experience perception, between the primiparous's husband who participated in actual labor and delivery process with her wife after finishing Lamaze childbirth class education and the husband who did not finished Lamaze childbirth class, for providing the basic data for effective nursing intervention and pre-childbirth educational program development for husbands. Method: At one general hospital located in Kyunggi-do and one clinic in Seoul, from April 6th to May 12th, 2003, the subjects were 146 including 67 primipara's husbands who participated in the 5-week Lamaze educational program and 79 primipara's husbands who didn't, using structuralized questionnaire. Analysis: Mean, frequency, percentage, 2-test, and t-test were used by SPSS 10.0 program. Result: The sub-hypothesis 1, 'there are significant differences between anxiety of the group who participated in Lamaze and who didn't' was not accepted(t=-1.043, p=.299). The sub-hypothesis 2, 'there are significant differences between anxiety by cervical dilatation the group who participated in Lamaze program and who didn't' was not accepted(t=-1.123, P=.263, t=-.356, P=.722, t=-1.879, P=.062). The hypothesis 3, 'there are significant differences between perceived support of the group who participated in Lamaze program and who didn't' was accepted(t=4.860, P=.000). Especially, the obstetrical support of the group who participated in Lamaze program, which could reduce delivering pain, was higher. The hypothesis 4, 'there are significant differences between the perception of childbirth-labor experience of the group who participated in Lamaze program and who didn't' was accepted(t=2.816, P=.006). Conclusion: The Lamaze program was a effective nursing intervention for husband's affirmative perception of childbirth-labor experience as well as husband's role as active supporters during labor process. The change of present woman-centered pre-childbirth education into both partner-centered education stressing on husband's needs, viewpoint and role as a supporter should be considered. Therefore, hospital administrators should pay more attention on enhancing the opportunities of husband for pre-birth education and participating in the process of labor as a family-centered nursing intervention.

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Evaluation of Thermoelectric Characteristics of Peltier Thermoelectric Module for Increasing Response Velocity in Shape Memory Alloy (SMA) Steering Catheter (형상기억합금(SMA) 스티어링 카테터의 반응속도 향상을 위한 펠티어 열전소자의 열전기적 특성 평가)

  • Oh, Dong-Joon;Kim, Cheol-Woong;Kim, Tae-Young;Lee, Ho-Sang;Kim, Jay-Jung
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.34 no.3
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    • pp.301-307
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    • 2010
  • Actuation using a shape memory alloy (SMA) is considered to be an important technology that will play a leading role in market for next-generation medical devices because an SMA actuator can accurately imitate skillful and delicate hand movements. However, SMA actuators have not been successfully used because of problems in control design caused by the nonlinear hysteresis effect of SMA, which leads to inaccuracies in control systems. In order to overcome the effect, the authors invented a SMA actuator, which could actively and rapidly cool down and heat up, by combining a SMA catheter and a TE module using the Peltier effect. In order to evaluate the TE characteristics of our TE module system, the changes in the temperature with 1) incremental increases in a continuous electric current and 2) the appearance of a discontinuous constant or reverse current are discussed in this paper.

Characteristics of Low-frequency Ambient Seismic Noise in South Korea (국내 저주파수 무작위 지진잡음의 특성 연구)

  • Park, Iseul;Kim, Ki Young;Byu, Joongmoo
    • Geophysics and Geophysical Exploration
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    • v.19 no.2
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    • pp.67-75
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    • 2016
  • To investigate spatial and temporal variations of low-frequency (${\leq}5Hz$) ambient seismic noise, we analyzed the noise data recorded for one whole year of 2014 at surface accelerometer stations in South Korea. After decomposed into low-frequency (LF; < 1 Hz) and high-frequency (HF; ${\geq}1Hz$) components, the root-mean-squared (RMS) amplitudes and power spectral densities (PSD) of the noise data were computed. The RMS amplitudes were larger on islands and near-shore stations, but also large RMS amplitudes were observed at inland stations in large cities only for HF components. The RMS amplitudes of HF components were larger in the daytime than at nighttime and during weekdays than on Sunday and holidays. This indicates the HF components are closely related to human activities. On the contrary, daily and weekly variations were not clear in the LF components while they showed seasonal variations with its maximum during the winter and a good correlation with significant wave height. Therefore, we interpret the mechanism of LF components is closely related to natural phenomena such as sea. The amplitude of LF components decreased as an exponential function of the distance to the center of typhoons. The exponential index of -0.76 suggested that ambient seismic noise included both surface and body waves. Peak frequencies of the PSD curves were near 0.34 Hz indicating the double frequency. No temporal variation in the peak frequency was clearly noticed.

Comparison among Wide-area Local Governments of Needs for Integrated Care for Older Adults (광역 지자체별 노인의 통합돌봄 요구 비교)

  • Oh, Hyun Jeong;Kim, Hyeongsu;Ko, Young;Shin, Eunyoung;Son, Miseon
    • Journal of Convergence for Information Technology
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    • v.10 no.8
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    • pp.194-202
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    • 2020
  • This study was conducted to identify and compare the needs of the integrated by local government, and to provide basic data for the provision of integrated care services. This is a secondary data analysis study using data from 10,299 elderly people living in 17 local governments who participated in the '2017 National Survey on the Aged People in Korea'. The difference in medical needs, daily living support needs, and social activity support needs were 2.4, 6.0, and 2.0 times higher in the highest regions than in the lowest regions. In addition, the size of the medical needs group, welfare needs group, and integrated care needs group varied by region. Through this study, it was confirmed that the level of integrated care needs varied by region. Therefore, in order to efficiently provide the services at the national level, it is necessary to accurately assess the needs of the aged in each local government, and accordingly, prioritize and identify available resources within the care service and appropriate allocation.

An Efficient Morphological Segmentation Using a Connected Operator Based on Size and Contrast (크기 및 대조 기반의 Connected Operator를 이용한 효과적인 수리형태학적 영상분할)

  • Kim, Tae-Hyeon;Moon, Young-Shik
    • Journal of the Institute of Electronics Engineers of Korea SP
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    • v.42 no.6
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    • pp.33-42
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    • 2005
  • In this paper, we propose an efficient segmentation algerian using morphological grayscale reconstruction for region-based coding. Each segmentation stage consists of simplification, marker extraction and decision. The simplification removes unnecessary components to make an easier segmentation. The marker extraction finds the flat zones which are the seed points from the simplified image. The decision is to locate the contours of regions detected by the marker extraction. For the simplification, we use a new connected operator based on the size and contrast. In the marker extraction stage, the regions reconstructed to original values we excluded from the candidate marker. For the other regions, the regions which are larger than structuring elements or have higher contrast than a threshold value are selected as markers. For the initial segmentation, the conventional hierarchical watershed algorithm and the extracted markers are used. Finally in the region merging stage, we propose an efficient region merging algorithm which preserves a high quality in terms of the number of regions. At the same time, the pairs which have higher contrast than a threshold are excluded from the region merging stage. Experimental results show that the proposed marker extraction method produces a small number of markers, while maintaining high quality and that the proposed region merging algorithm achieves a good performance in terms of the image quality and the number of regions.