Simple renal cyst is the most common space- occupying lesion of kidney in adults. However, there were a few systematic Korean reports for the prevalence of simple renal cysts. Our purpose was to estimate the prevalence of simple renal cysts using ultrasonography, and to determine the relations to age and hypertension. The subjects were 504 volunteers (aged over 29 years) of the persons who were enrolled a health check-up program of Naju Hospital, Naju, Korea. Number of male in 504 persons was 334 (66.3%) and female 170 (33.7%). Mean age was 55 years (range; 30-86). The results were as follows: 1) One or more renal cysts were found in 50 individuals of 504 persons aged over 29 years (9.9%). In 331 persons aged over 49 years, the prevalence of simple renal cysts was 12.1%. The prevalence was significantly increased with age (P<0.001), but the difference between male (9.6%) and female (10.6%) was insignificant. 2) Mean value of cyst diameter was 23mm (5-69 mm) and was not correlated with age. However, the cyst diameter was significantly higher in female than in male, 32.4mm vs 18.0mm (P<0.001). Total number of cysts per person tended to increase with age (P<0.001). 3) The correlation between prevalence of simple renal cysts and blood pressure was statistically insignificant. However, the prevalence of hypertension in persons with cysts was higher than in persons with no cyst (27.9% vs 15.3%, P<0.05). Cyst diameter was not correlated with blood pressure. 4)Urinalysis in persons with cysts, showed microscopic hematuria in 47.4% and proteinuria in 26.3 %, however, grade of microscopic hematuria and proteinuria were not correlated with cyst diameter. The concentrations of blood urea nitrogen, serum creatinine, hemoglobin and hematocrit were not affected by presence or absence of simple renal cysts. By comparison with the recent foreign reports, the prevalence of simple renal cysts in Korean was similar to those in foreigners. Our study ascertained that simple renal cysts are age-dependent and total number of cysts per person also increases with age. In most of persons with simple renal cysts, the renal function is not affected and the related symptoms are trivial. However, we suggested that simple renal cysts may cause hypertension. To elucidate the correlation between simple renal cyst and hypertension, further studies are needed.
Adult ; Blood Pressure ; Blood Urea Nitrogen ; Creatinine ; Emigrants and Immigrants ; Female ; Hematocrit ; Hematuria ; Humans ; Hypertension* ; Jeollanam-do ; Kidney ; Korea ; Male ; Prevalence* ; Proteinuria ; Ultrasonography* ; Volunteers

Objectives: ：Loneliness and poor sleep quality are common phenomena in old age and are associated with negative physical and mental health. However, little is known regarding the relation between loneliness and sleep quality. The aim of this study was to examine the association of loneliness and sleep quality among the elderly living alone. Methods: ：This is a cross-sectional study that enrolled 1,090 subjects who are the community-residing elderly living alone. Sociodemographic status, medical condition, cognition, mood disorder, sleep quality and levels of loneliness were collected using a self-administered questionnaire and a specific semi-structured interview con-ducted by trained nurses. Descriptive statistics were used to analyze data regarding sociodemographic variable and loneliness. Univariate and Multivariate regression analyses were applied to examine the association between loneliness and sleep quality after adjustment for multiple confounding variables. Results: ：The Pittsburgh Sleep Quality Index (PSQI) mean score of “lonely group” (9.2±4.2) was signifi-cantly higher than that of “not lonely group” (7.3±3.7) (student-t test, p<0.001). Loneliness was significantly as-sociated with PSQI (standardized β= 0.065, p=0.025), sleep disturbance (standardized β=0.086, p=0.005), use of sleep medication (standardized β= 0.065, p=0.034) after adjustment for possible confounding variables including sex and mood disorder. Conclusions ：Loneliness was associated with sleep disturbance and this finding implied negative impact of loneliness on sleep quality of older adults. Public health promotion efforts to reduce loneliness may improve sleep quality and mental health in the elderly living alone.

Objectives: ：Loneliness and poor sleep quality are common phenomena in old age and are associated with negative physical and mental health. However, little is known regarding the relation between loneliness and sleep quality. The aim of this study was to examine the association of loneliness and sleep quality among the elderly living alone. Methods: ：This is a cross-sectional study that enrolled 1,090 subjects who are the community-residing elderly living alone. Sociodemographic status, medical condition, cognition, mood disorder, sleep quality and levels of loneliness were collected using a self-administered questionnaire and a specific semi-structured interview con-ducted by trained nurses. Descriptive statistics were used to analyze data regarding sociodemographic variable and loneliness. Univariate and Multivariate regression analyses were applied to examine the association between loneliness and sleep quality after adjustment for multiple confounding variables. Results: ：The Pittsburgh Sleep Quality Index (PSQI) mean score of “lonely group” (9.2±4.2) was signifi-cantly higher than that of “not lonely group” (7.3±3.7) (student-t test, p<0.001). Loneliness was significantly as-sociated with PSQI (standardized β= 0.065, p=0.025), sleep disturbance (standardized β=0.086, p=0.005), use of sleep medication (standardized β= 0.065, p=0.034) after adjustment for possible confounding variables including sex and mood disorder. Conclusions ：Loneliness was associated with sleep disturbance and this finding implied negative impact of loneliness on sleep quality of older adults. Public health promotion efforts to reduce loneliness may improve sleep quality and mental health in the elderly living alone.

PURPOSE: Posterior tibialis tendon dysfunction (PTTD) is one of the most common causes of acquired flatfoot deformity in western countries. But it was known that they were very rare in eastern countries. So we want to report the clinical features and outcomes of 12 patients with PTTD. MATERIALS AND METHODS: We evaluated the results of 12 patients using clinical features and results from March 2000 to January 2007 and mean follow up periods is 32 months. RESULTS: Average age was 45 years, 8 of 12 patients were female, 2 patient with hypertension and 1 with rheumatoid arthritis. 5 patients were overweighted and 5 patients were obese. 4 patients has a history of last trauma. 4 patients experienced progression of flatfoot. On behalf of Johnson and Strom classifications 6 cases were grade I, 4 cases were grade II, grade III, and grade IV was 1 case, relatively. As a treatment we used tenosynovectomy for 3 cases of grade I, additional FDL transfer was done for 2 cases of grade I and 2 cases of grade II. For other 2 patients of grade II flexor digitorum longus transfer and Medial displacement calcaneal osteotomy was done. Pathologic findings of tendon showed degenerative tendinitis. Lastly conservative treatment group was 3 cases of grade I, III, IV each. Average preoperative and postoperative American Orthopedic Foot and Ankle Society's hindfoot/ankle scoreFAS score was 58 and 90. Initial and follow up AOFAS scores of the conservative group was 38 and 57, relatively. CONCLUSION: As a cause of acquired flatfoot in adult, PTTD is not a rare disease any more in Korea. To prevent the disability and progression of flatfoot, careful clinical evaluation and proper treatment is important.
Adult ; Animals ; Ankle ; Arthritis, Rheumatoid ; Congenital Abnormalities ; Displacement (Psychology) ; Female ; Flatfoot ; Follow-Up Studies ; Foot ; Humans ; Hypertension ; Korea ; Orthopedics ; Osteotomy ; Overweight ; Rare Diseases ; Tendinopathy ; Tendons

The general linear model (GLM) describes the dependent variable as a linear combination of independent variables and an error term. The GLM procedure of SAS® and the “car” package in R calculate the type I, II, or III ANOVA (analysis of variance) tables. In this study, we validated the newly-developed R package, “sasLM,” which is compatible with the GLM procedure of SAS®. The “sasLM” package was validated by comparing the output with SAS®, which is the current gold standard for statistical programming. Data from ten books and articles were used for validation. The results of the “sasLM” and “car” packages were compared with those in SAS® using 194 models. All of the results in “sasLM” were identical to those of SAS®, whereas more than 20 models in “car” showed different results from those of SAS®. As the results of the “sasLM” package were similar to those in SAS® PROC GLM, the “sasLM” package could be a viable alternative method for calculating the type II and III sum of squares. The newly-developed “sasLM” package is free and open-source, therefore it can be used to develop other useful packages as well. We hope that the “sasLM” package will enable researchers to conveniently analyze linear models.

OBJECTIVE: Middle-aged and geriatric diseases are becoming prevalent in developing countries and some industrialized nations. The present study was undertaken to determine the prevalence of middle-aged and geriatric diseases in Hwasun County, a rural area of Korea, and to examine the correlation between them and various clinical parameters. METHODS: Population-based cross-sectional study by random cluster sampling of registered residents over 39 years of age was performed. Out of the 3,138 subjects scheduled for the survey, 2,021 residents (male 812, female 1,209) underwent the actual examinations (response rate:64.4%). We examined their weight, height, blood pressure, diet pattern, past and family history, alcohol-drinking and smoking history, and various laboratory parameters. RESULTS: The mean body mass index (BMI) was 22.8+/-3.8. In BMI criteria, the crude prevalence of obesity was found to be 24.6% (grade I obesity; 22.9%, grade II obesity; 1.7%). We found the increasing hypertension, diabetes mellitus, hypercholesterolemia as BMI increased. Overall crude prevalence was 21.4% for hypertension defined as BP (blood pressure) > or =140/90 mmHg or subject on medication, and 16.1% for BP > or =160/100 mmHg or subject on medication. The crude prevalence of diabetes mellitus, hypercholesterolemia, alcoholic liver disease, ischemic heart disease diagnosed by electrocardiography were 6.2%, 6.0%, 4.4%, and 2.3%, respectively. These prevalence were found to be relatively lower than those of reported elsewhere in the world. CONCLUSION: These data indicate that middle-aged and geriatric diseases in the rural area of korea are becoming prevalent, although they are less prevalent than in the urban area or advanced countries. We hope that the present study contributes to understand the prevalence of middle-aged and geriatric diseases in the rural area of Korea, and to prevent and control them adequately.
Blood Pressure ; Body Mass Index ; Cross-Sectional Studies ; Developed Countries ; Developing Countries ; Diabetes Mellitus ; Diet ; Electrocardiography ; Female ; Hope ; Humans ; Hypercholesterolemia ; Hypertension ; Korea* ; Liver Diseases, Alcoholic ; Mass Screening* ; Myocardial Ischemia ; Obesity ; Prevalence ; Smoke ; Smoking

BACKGROUND: Over the last decade, the incidence of ultraviolet B (UVB)-related skin problems has increased. Oxidative stress caused by UVB induces the secretion of melanocyte growth and activating factors from keratinocytes, which results in the formation of cutaneous hyperpigmentation. Therefore, increasing the antioxidant abilities of skin cells is thought to be a beneficial strategy for the development of sunscreen agents. Superoxide dismutase 1 (SOD1) is an antioxidant enzyme that is known to exhibit antioxidant properties. OBJECTIVE: The purpose of this study was to investigate the effect of SOD1 on alpha-melanocyte stimulating hormone (alpha-MSH) and UVB-induced melanogenesis in B16F10 melanoma cells and HRM-2 melanin-possessing hairless mice. METHODS: The inhibitory effect of SOD1 on tyrosinase activity was evaluated in a cell-free system. Additional experiments were performed using B16F10 melanoma cells to demonstrate the effects of SOD1 in vitro, and HRM-2 melanin-possessing hairless mice were used to evaluate the antimelanogenic effects of SOD1 in vivo. RESULTS: We found that SOD1 inhibited melanin production in a dose-dependent manner without causing cytotoxicity in B16F10 melanoma cells. SOD1 did not inhibit tyrosinase activity under cell-free conditions. The results indicate that SOD1 may reduce pigmentation by an indirect, nonenzymatic mechanism. We also found that SOD1 decreased UVB-induced melanogenesis in HRM-2 melanin-possessing hairless mice, as visualized through hematoxylin and eosin staining and Fontana-Masson staining. CONCLUSION: Our results indicate that SOD1 has an inhibitory effect on alpha-MSH and UVB-induced melanogenesis, indicating that SOD1 may be a promising sunscreen agent.
alpha-MSH ; Animals ; Cell-Free System ; Eosine Yellowish-(YS) ; Hematoxylin ; Hyperpigmentation ; Incidence ; Keratinocytes ; Melanins ; Melanocytes ; Melanoma ; Mice ; Mice, Hairless ; Monophenol Monooxygenase ; Oxidative Stress ; Pigmentation ; Skin Pigmentation ; Skin* ; Superoxide Dismutase*

Background: The purpose of this study was to identify the prevalence of posttraumatic embitterment disorder (PTED) among soldiers, and examine its relation to stress, depression, self-esteem, impulsiveness, and suicidal ideation. Methods: The subjects of this study were 200 soldiers and 197 control subjects, a total of 397 persons. Measurement tools used included the PTED self-rating scale, Stress Response Inventory, Beck Depression Inventory, Rosenberg Self-Esteem Inventory, Barratt Impulsiveness Scale, and Beck Scale of Suicide Ideation.Result: The major findings of the analysis are as follows: first, 11.5% of the soldiers were in the risk group for PTED, and 4% of them had PTED. Second, PTED in the soldiers was significantly associated with a number of variables such as their educational background, stress, depression, self-esteem, impulsiveness, and suicidal ideation, while it was not significantly associated with age. Third, through the hierarchical multiple regression analysis, it was found that academic background, stress, and depression had a statistically significant positive effect on the incidence of PTED in the soldiers. Conclusion In order to prevent and effectively intervene in PTED in soldiers, there is a need for interventional efforts focused on depression and stress related to negative life events.