• Title/Summary/Keyword: recurrent

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Assessing the Prevalence of Recurrent Neck and Shoulder Pain in Korean High School Male Students: A Cross-sectional Observational Study

  • Koh, Min-Jung;Park, Sun-Young;Woo, Young-Sun;Kang, Sung-Hyun;Park, Sang-Hoon;Chun, Hye-Jung;Park, Eun-Jung
    • The Korean Journal of Pain
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    • v.25 no.3
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    • pp.161-167
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    • 2012
  • Background: Neck and shoulder pain (NSP) is fairly common in adolescents, which is associated with a high prevalence of NSP found during adulthood as well; therefore, its significance during adolescence should not be underestimated. We surveyed the prevalence of recurrent NSP, lifestyle, and risk factors in Korean high school students, and examined the influence of recurrent NSP on the quality of life. Methods: Nine hundred thirty one male students (16-19 years old) from two academic high schools in Seoul were included in this study. The survey consisted of a questionnaire to assess the prevalence of recurrent NSP, with questions regarding having an occurrence more than once a week, characteristics of NSP, activity and lifestyle of the students, and the risk factors for recurrent NSP. A 36-item Short Form questionnaire was also examined. Results: We found that 44.3% of the high school students surveyed had recurrent NSP (more than once a week) and the overall prevalence of NSP was 79.1%. The average sitting time was $10.2{\pm}2.7$ h/day. 59.0% did not sit straight, 14.7% used assisting devices during reading, and 11.9% answered that they stretched regularly. Found from their self assessed health, frequent fatigue and frequent depressed mood presented significant associations with the higher prevalence of recurrent NSP. Conclusions: Korean high school students had a high prevalence of recurrent NSP. Clinical attention is needed for the prevention and resolution of recurrent NSP found in high school students.

Clinical Study on Recurrent Peripheral Facial Nerve Palsy (말초성 안면마비 환자의 재발에 대한 임상적 고찰)

  • Shin, Ye-Ji;Kown, Na-Hyoun;Park, Hyun-Ae;Woo, Hyun-Su;Beak, Yong-Hyeon;Park, Dong-Suk;Koh, Hyung-Kyun
    • Journal of Acupuncture Research
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    • v.26 no.1
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    • pp.29-37
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    • 2009
  • Objectives : This study was performed to categorize and define causes of recurrent peripheral facial nerve palsy. Methods : 54 patients was identified with recurrent peripheral facial nerve palsy among 726 patients who visited the Facial Palsy Center in East-West Neo Medical Center between May 2006 and August 2008. We reviewed the medical records including gender, age, laterality, number of recurrence, primary onset age, interval between recurrences, accompanied disease(e.g. DM, HTN), and axonal loss. Results : Patients whose primary palsy onset was before their second decade had a higher possibility of recurrence and tended to recur more than twice. Double-episode ipsilaterally recurrent group showed definitely worse result of axonal loss compared with non-recurrent group and single-episode ipsilaterally recurrent group. But There was no statistically significant difference between mean axonal loss of the non-recurrent group and single-episode ipsilaterally recurrent group. Conclusions : This study was designed for 54 patients and further studies are necessary.

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A Study on Relation between the Quality of Life and Factors for recurrent Stress of Alcohol Dependents (일부 알코올 의존자의 삶의 질 및 재발 스트레스 요인과의 관련성 연구)

  • Ryu, Hodal;Chong, Myong Soo
    • Journal of Korean Medical Ki-Gong Academy
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    • v.13 no.1
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    • pp.105-144
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    • 2013
  • This study intended to provide fundamental data to take countermeasures against recurrent stress by analyzing the health-related quality of life and factors for recurrent stress of alcohol dependents. Structured questionnaire was prepared for patients who quitted drinking after they had been hospitalized for alcohol dependence to take medical treatment but suffered recurrence, and analysis on health-related quality of life and environmental factors with drinking risk was conducted. The quality of life was at a relatively satisfactory level, where pain was found at the highest level and general health condition was found at the lowest level. Environmental factors with drinking risk were found to be a moderate level, drinking for the reason of family and friends in terms of complications with other persons was found to be highest, and then job, self control, bad emotions, and social pressure on drinking were found in order. For health-related quality of life, the quality of life was found to be high in case of the only son, professional job, well-educated persons, and no history of hospitalization. Regarding factors for recurrent stress, stress was found to be high in case of the eldest son and being without religion, and the lower was the quality of life, the higher were recurrent stress and environmental factors with drinking risk. It was found that demographic factors including age, marriage, and job influenced the recurrence of alcohol dependence, and factors for recurrent stress, etc. also influenced recurrent alcohol dependence with drinking risks. Specially, the lower was the quality of life, the higher were factors for recurrent stress, and drinking risks, therefore measures to improve the quality of life are required to be taken to prevent alcohol dependence from recurrence.

Comparative Study on Fall Related Characteristics between Single and Recurrent Falls in Community-Dwelling Older Women (재가 여성노인에서 1회 낙상군과 반복낙상군의 낙상관련 특성 비교연구)

  • Park, Hyoung-Sook;Chang, Rang;Park, Kyung-Yeon
    • Korean Journal of Adult Nursing
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    • v.20 no.6
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    • pp.905-916
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    • 2008
  • Purpose: The purpose of this study was to identify the influencing factors on the single and recurrent falls in community-dwelling older women. Methods: Seventy eight volunteers aged over 65 were included in the study. The participants experienced at least one fall within the past one year. Data were measured on each participant from May 2007 to September 2007, collected using structured researcher-administered sheets and measuring their physical strengths and analyzed by descriptive statistics, t-test, chi-square test, Mann-Whitney U test and logistic regression analysis. Results: The prevalence of recurrent falls were 53.8%. The level of education(Z = -2.455, p = .014) and the presence of spouse($x^2$ = 4.843, p = .044) showed significant differences between the single-fall group and the recurrent-fall group in the study. Significantly predicting factor on the recurrent falls was the level of education and the variable explained 20.1% of variants in the occurrence of recurrent falls. Conclusion: Although a variety of factors affected the single fall in the elderly women, the level of education and the presence of spouse proved to be the significant factors in their recurrent falls. These factors proven to be significant as the result of this should be reflected in the development of effective programs for preventing the elderly from recurrent falls.

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On Generalized 𝜙-recurrent Kenmotsu Manifolds with respect to Quarter-symmetric Metric Connection

  • Hui, Shyamal Kumar;Lemence, Richard Santiago
    • Kyungpook Mathematical Journal
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    • v.58 no.2
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    • pp.347-359
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    • 2018
  • A Kenmotsu manifold $M^n({\phi},\;{\xi},\;{\eta},\;g)$, (n = 2m + 1 > 3) is called a generalized ${\phi}-recurrent$ if its curvature tensor R satisfies $${\phi}^2(({\nabla}_wR)(X,Y)Z)=A(W)R(X,Y)Z+B(W)G(X,Y)Z$$ for all $X,\;Y,\;Z,\;W{\in}{\chi}(M)$, where ${\nabla}$ denotes the operator of covariant differentiation with respect to the metric g, i.e. ${\nabla}$ is the Riemannian connection, A, B are non-vanishing 1-forms and G is given by G(X, Y)Z = g(Y, Z)X - g(X, Z)Y. In particular, if A = 0 = B then the manifold is called a ${\phi}-symmetric$. Now, a Kenmotsu manifold $M^n({\phi},\;{\xi},\;{\eta},\;g)$, (n = 2m + 1 > 3) is said to be generalized ${\phi}-Ricci$ recurrent if it satisfies $${\phi}^2(({\nabla}_wQ)(Y))=A(X)QY+B(X)Y$$ for any vector field $X,\;Y{\in}{\chi}(M)$, where Q is the Ricci operator, i.e., g(QX, Y) = S(X, Y) for all X, Y. In this paper, we study generalized ${\phi}-recurrent$ and generalized ${\phi}-Ricci$ recurrent Kenmotsu manifolds with respect to quarter-symmetric metric connection and obtain a necessary and sufficient condition of a generalized ${\phi}-recurrent$ Kenmotsu manifold with respect to quarter symmetric metric connection to be generalized Ricci recurrent Kenmotsu manifold with respect to quarter symmetric metric connection.

Different Expression of Extracellular Matrix Genes: Primary vs. Recurrent Disc Herniation

  • Kuh, Sung-Uk;Kwon, Young-Min;Chin, Dong-Kyu;Kim, Keun-Su;Jin, Byung-Ho;Cho, Yong-Eun
    • Journal of Korean Neurosurgical Society
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    • v.47 no.1
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    • pp.26-29
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    • 2010
  • Objective: Recurrent lumbar disc herniation has been reported to occur in 5% to 15% of surgically treated primary lumbar disc herniation cases. We investigated the molecular biologic characteristics of primary herniated discs and recurrent discs to see whether the recurrent discs has the similar biological features with primary herniated discs. Methods: Primary hemiated disc and recurrent disc cells were obtained by discectomy of lumbar disc patients and cells were isolated and then taken through monolayer cultures. We compared chondrogenic and osteogenic mRNA gene expression, and western blot between the two groups. Results: The mRNA gene expression of recurrent disc cells were increased 1.47* times for aggrecan, 1.38 times for type I collagen, 2.04 times for type II collagen, 1.22 times for both Sox-9 and osteocalcin, and 1.31 times for alkaline phosphatase, respectively, compared with the primary herniated lumbar disc cells (*indicates p < 0.05). Westem blot results for each aggrecan, type I collagen, type II collagen, Sox-9, osteocalcin, and alkaline phosphatase were similar between the primary herniated disc cells and recurrent disc cells. Conclusion: These results indicate that the recurrent disc cells have similar chondrogenic and osteogenic gene expression compared to primary herniated disc cells. Therefore, we assumed that the regeneration of remaining discs could fill the previous discectomy space and also it could be one of the factors for disc recurrence especially in the molecular biologic field.

Empirical antibiotics for recurrent urinary tract infections in children

  • Choi, Hyun Gil;Lee, Ji Young;Oh, Chi Eun
    • Kosin Medical Journal
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    • v.33 no.2
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    • pp.159-170
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    • 2018
  • Objectives: The purpose of this study was to compare antibiotic resistance patterns between first urinary tract infection (UTI) and recurrent UTI groups and to obtain information regarding empirical antibiotic selection for treating recurrent UTI. Methods: We retrospectively reviewed 148 children treated for UTIs from January 2009 to June 2016. The patients were divided into two groups: first UTI (N = 148) and recurrent UTI (17 patients and 20 episodes). Results: In both groups, Escherichia coli was the most frequent causative organism, accounting for 89.9% and 75.0% in the first and recurrent UTI groups, respectively. When E. coli or Klebsiella pneumoniae was the causative organism, extended-spectrum ${\beta}-lactamase$ (ESBL)-producing organisms were more frequent in the recurrent UTI group (17.6%) than in the first UTI group (14.0%); however, this difference was not statistically significant (P = 0.684). Cefotaxime was the most frequently used first-line empirical antibiotic in both groups. In the first UTI and recurrent UTI groups, 7.4% and 15.0% of patients were treated with intravenous antibiotics as definitive therapy, respectively (P = 0.250). Fifteen out of 17 patients having a second UTI had different causative organisms or antibiotic susceptibility patterns compared to their previous episode. Conclusions: Escherichia coli was the most frequent causative organism in the recurrent UTI group. There were no differences in the proportion of ESBL-producing organisms between the first UTI and recurrent UTI groups. Therefore, when a UTI recurs in children, the antibiotics effective on the most common causative organism might be administered as empirical antibiotics.

Clinical Analysis of Recurrent Bell's Palsy in One University Hospital (한 대학병원에서 분석한 재발 벨마비 환자의 임상양상)

  • Kim, Chang Hyeong;Lee, Dong Kuck
    • Annals of Clinical Neurophysiology
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    • v.15 no.1
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    • pp.1-6
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    • 2013
  • Background: Bell's palsy (BP) is the most common cause of unilateral lower motor facial palsy. Recurrent paralysis of the facial nerve is unusual and reported in only 7-8%. Methods: A total of 394 consecutive patients with acute BP patients were enrolled at Daegu Catholic University Hospital from July 2005 to September 2012. We classified the patients into two groups-single BP and recurrent BP-and compared them by patient characteristics, clinical features, MRI findings, electrophysiologic findings and prognosis. The degree of BP was graded according to the House and Brackmann facial nerve grading system. Results: Recurrent BP was observed in 31 (7.9%) patients. The number of recurrence was varied from 2 to 5. The recurrent BP (9.7%) had more incidence of family history and MRI enhancement than those of single BP (2.2%, p=0.047). The single BP (63.4%) had better recovery than recurrent BP (45.2%, p=0.045). Conclusions: The recurrent BP had more incidence of family history, MRI enhancement and poor prognosis than the single BP.

A PMSM Driven Electric Scooter System with a V-Belt Continuously Variable Transmission Using a Novel Hybrid Modified Recurrent Legendre Neural Network Control

  • Lin, Chih-Hong
    • Journal of Power Electronics
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    • v.14 no.5
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    • pp.1008-1027
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    • 2014
  • An electric scooter with a V-belt continuously variable transmission (CVT) driven by a permanent magnet synchronous motor (PMSM) has a lot of nonlinear and time-varying characteristics, and accurate dynamic models are difficult to establish for linear controller designs. A PMSM servo-drive electric scooter controlled by a novel hybrid modified recurrent Legendre neural network (NN) control system is proposed to solve difficulties of linear controllers under the occurrence of nonlinear load disturbances and parameters variations. Firstly, the system structure of a V-belt CVT driven electric scooter using a PMSM servo drive is established. Secondly, the novel hybrid modified recurrent Legendre NN control system, which consists of an inspector control, a modified recurrent Legendre NN control with an adaptation law, and a recouped control with an estimation law, is proposed to improve its performance. Moreover, the on-line parameter tuning method of the modified recurrent Legendre NN is derived according to the Lyapunov stability theorem and the gradient descent method. Furthermore, two optimal learning rates for the modified recurrent Legendre NN are derived to speed up the parameter convergence. Finally, comparative studies are carried out to show the effectiveness of the proposed control scheme through experimental results.

LIGHTLIKE HYPERSURFACES OF AN INDEFINITE KAEHLER MANIFOLD WITH A SEMI-SYMMETRIC NON-METRIC CONNECTION

  • Jin, Dae Ho
    • Journal of the Korean Mathematical Society
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    • v.54 no.1
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    • pp.101-115
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    • 2017
  • In this paper, we study three types of lightlike hypersurfaces, which are called recurrent, Lie recurrent and Hopf lightlike hypersurfaces, of an indefinite Kaehler manifold with a semi-symmetric non-metric connection. We provide several new results on such three types of lightlike hypersurfaces of an indefinite Kaehler manifold or an indefinite complex space form, with a semi-symmetric non-metric connection.