Current status of physical activity in Korea and exercise prescriptions

Physical activity is vital for health promotion and maintenance. The proportion meeting the guidelines for basic physical activity recommended by the World Health Organization is not high. Insufficient physical activity combined with aging can lead to development of various chronic diseases, increasing risks of complications. To prevent cardiovascular disease, cancer, and musculoskeletal diseases, and to promote mental health, it is necessary to increase physical activity.Current Concepts: The global insufficient aerobic physical activity rate was 27.5% in 2016. In Korea, the rate of aerobic insufficient physical activity in adults over the age of 19 was 54.4% in 2020 (51.7% for men and 57% for women). The rate in adults aged 19 to 64 was 53.9% (male 51.8% and female 56.1%), can reach 66.8% (male 59.2% and female 73%) in those 65 years and older, and can be as high as 94.1% (male 91.3% and female 97.1%) in adolescents.Discussion and Conclusion: To promote physical activity, national and local governments, civic organizations, public health centers, workplaces, schools, and medical institutions must all work together. Medical personnel are in a good position to encourage physical activity in patients following occurrence of a disease. Physical activity of patients should be constantly encouraged by identifying the levels of physical activity for all patients, encouraging physical activity, providing motivation through information, and re-monitoring the progress of physical activity.

Successful Aging Transition and Its Impact on Self-Rated Health and Life Satisfaction: Findings from the Korean Longitudinal Study of Aging (2006-2018)

Background@#The concept of successful aging (SA) is becoming more emphasized. Since this status can change over time, it is necessary to evaluate the pattern of change and its effect on subjective well-being. @*Methods@#In this study, the participants aged 65 or older in the Korean longitudinal study of aging (KLoSA) were divided into four groups based on the change in SA (2006-2018), and its relationships with self-rated health and life satisfaction were evaluated. @*Results@#Compared to the non-SA (NSA)→NSA group, the odds ratio for positive self-rated health was 4.30 (95% confidence interval [CI], 1.64-11.31) in the SA→SA group, 3.92 (95% CI, 1.94-7.95) in the NSA→SA group, and 1.79 (95% CI, 1.28-2.50) in the SA→NSA group. High life satisfaction was 2.42 (95% CI, 1.19-4.94) in the SA→SA group and 2.50 (95% CI, 1.36-4.59) in the NSA→SA group. @*Conclusions@#Maintenance or improvements of a SA state has a significant association with positive self-rated health and high life satisfaction.

Current Status of Physical Activity in South Korea / 가정의학회지

The health benefits of physical activity have been well established. However, more than a quarter of the adult population in the world is insufficiently active (not performing at least 150 minutes of moderate-intensity physical activity per week, 75 minutes of vigorous-intensity physical activity per week, or any equivalent combination of the two), and there has been little improvement since 2001. In South Korea, the prevalence of insufficient physical activity was 54.4% in adults and 94.1% in adolescents in 2020. There was continuous decrease in the prevalence of sufficient aerobic physical activity, from 58.3% in 2014 to 45.6% in 2020. However, daily duration of sedentary behavior increased from 7.5 to 8.6 hours in the same period. Interventions to promote physical activity are necessary in various fields including clinical and policy approaches. As physical activity has decreased during the coronavirus disease 2019 pandemic, safer and more effective strategies to promote physical activity are required.

Analysis of Continuity of Care and Its Related Factors in Diabetic Patients: A Cross-Sectional Study / 가정의학회지

Background@#Continuity of care in primary care settings is crucial for managing diabetes. We aimed to statistically define and analyze continuity factors associated with demographics, clinical workforce, and geographical relationships. @*Methods@#We used 2014–2015 National Health Insurance Service claims data from the Korean registry, with 39,096 eligible outpatient attendance. We applied multivariable logistic regression to analyze factors that may affect the continuity of care indices for each patient: the most frequent provider continuity index (MFPCI), modified-modified continuity index (MMCI), and continuity of care index (COCI). @*Results@#The mean continuity of care indices were 0.90, 0.96, and 0.85 for MFPCI, MMCI and COCI, respectively. Among patient factors, old age >80 years (MFPCI: odds ratio [OR], 0.81; 95% confidence interval [CI], 0.74–0.89; MMCI: OR, 0.84; 95% CI, 0.76–0.92; and COCI: OR, 0.81; 95% CI, 0.74–0.89) and mild disability were strongly associated with lower continuity of care. Another significant factor was the residential area: the farther the patients lived from their primary care clinic, the lower the continuity of diabetes care (MFPCI: OR, 0.74; 95% CI, 0.70–0.78; MMCI: OR, 0.70; 95% CI, 0.66–0.73; and COCI: OR, 0.74; 95% CI, 0.70–0.78). @*Conclusion@#The geographical proximity of patients’ residential areas and clinic locations showed the strongest correlation as a continuity factor. Further efforts are needed to improve continuity of care to address the geographical imbalance in diabetic care.

Analysis of the Comprehensiveness of Primary Care Clinics in Korea / 가정의학회지

Background@#In the Republic of Korea, which medical specialties should take the responsibility for primary care and what the role of primary care should be are still unclear. In this study, we focused on the comprehensiveness of primary care to identify related factors. @*Methods@#The National Health Insurance Service (NHIS)-National Sample Cohort is a population-based cohort, sampled in the 2002 NHIS database and followed up until 2015. We used data collected from January 2014 to December 2015, including 20,423,832 outpatient visits in 19,557 office-based clinics. The Korean government has designated 52 simple or minor disease groups (SMDGs) to enhance the experience of patients who attend primary care for managing those diseases. We assessed comprehensiveness for each clinic as the number of SMDGs treated in each clinic for 2 years. We also identified the factors related to higher comprehensiveness, using logistic regression for analysis. @*Results@#The clinics included in the study had provided treatment for an average of 14 SMDGs during a 2-year period. Compared to general practitioners, internal medicine physicians presented higher comprehensiveness with an odds ratio (OR) of 2.29 (95% confidence interval [CI], 2.03–2.59), and family medicine physicians illustrated higher comprehensiveness (OR, 4.96; 95% CI, 3.59–6.83). Other specialties showed lower comprehensiveness than general practitioners. Clinics located in the capital city and metropolitan area tended to have lower comprehensiveness. Clinics hiring more doctors and having hospitalization facility showed higher comprehensiveness. @*Conclusion@#General physician, internal medicine, and family medicine are the fields providing comprehensive medical care in Korea. Clinics located in metropolitan area and capital city show lower comprehensiveness. The number of physicians is related to higher comprehensiveness of clinics.

Analysis of the Comprehensiveness of Primary Care Clinics in Korea / 가정의학회지

Background@#In the Republic of Korea, which medical specialties should take the responsibility for primary care and what the role of primary care should be are still unclear. In this study, we focused on the comprehensiveness of primary care to identify related factors. @*Methods@#The National Health Insurance Service (NHIS)-National Sample Cohort is a population-based cohort, sampled in the 2002 NHIS database and followed up until 2015. We used data collected from January 2014 to December 2015, including 20,423,832 outpatient visits in 19,557 office-based clinics. The Korean government has designated 52 simple or minor disease groups (SMDGs) to enhance the experience of patients who attend primary care for managing those diseases. We assessed comprehensiveness for each clinic as the number of SMDGs treated in each clinic for 2 years. We also identified the factors related to higher comprehensiveness, using logistic regression for analysis. @*Results@#The clinics included in the study had provided treatment for an average of 14 SMDGs during a 2-year period. Compared to general practitioners, internal medicine physicians presented higher comprehensiveness with an odds ratio (OR) of 2.29 (95% confidence interval [CI], 2.03–2.59), and family medicine physicians illustrated higher comprehensiveness (OR, 4.96; 95% CI, 3.59–6.83). Other specialties showed lower comprehensiveness than general practitioners. Clinics located in the capital city and metropolitan area tended to have lower comprehensiveness. Clinics hiring more doctors and having hospitalization facility showed higher comprehensiveness. @*Conclusion@#General physician, internal medicine, and family medicine are the fields providing comprehensive medical care in Korea. Clinics located in metropolitan area and capital city show lower comprehensiveness. The number of physicians is related to higher comprehensiveness of clinics.

Influence of Fine Particulate Dust Particulate Matter 10 on Respiratory Virus Infection in the Republic of Korea

BACKGROUND: This study investigated the effect of fine dust concentrations in the air on the incidence of viral respiratory infections in the Republic of Korea.METHODS: A time series analysis using R statistics was performed to determine the relationship between weekly concentrations of fine dust in the air and the incidences of acute respiratory tract infections caused by the respiratory syncytial virus (RSV), adenovirus (HAdV), rhinovirus (HRV), human metapneumovirus (HMPV), human coronavirus (HCoV), human bocavirus (HBoV), human parainfluenza virus (HPIV), and influenza virus (IFV), from the beginning of 2016 to the end of 2017. Correlations between various meteorological factors and the amount of fine dust were analyzed using the Spearman's rank correlation coefficient. To analyze the relationship between viral infections and fine dust, a quasi-poisson analysis was performed.RESULTS: The incidence of the HAdV was proportional to fine dust and air temperature. The IFV was proportional to fine dust and relative humidity and was inversely proportional to temperature. The HMPV was proportional to fine dust, wind speed, and inversely proportional to relative humidity. The HCoV was proportional to micro dust, relative humidity, and inversely proportional to temperature. Both the HBoV and HPIV were directly proportional to fine dust, temperature, wind speed, and inversely proportional to relative humidity. The RSV was inversely proportional to fine dust, temperature, wind speed. A lag effect was observed for the influenza virus, in that its incidence increased 2–3 weeks later on the cumulative lag model.CONCLUSION: As the weekly average concentration of fine dust increases, the incidence of HAdV, HMPV, HCoV, HBoV, HPIV, and influenza increase.

Associated Factors for Target Blood Pressure Achievement after Triple Combination Therapy in Hypertensive Patients

BACKGROUND: The prevalence of hypertension reaches 29% in adults over 30 years of age in the Korean population; however, the control rate is merely 44%. The aim of this study was to investigate the associated factors for target blood pressure achievement after triple combination therapy in hypertensive patients. METHODS: From February 2016 to May 2018, 10 family physicians recruited 348 patients, who newly started a triple combination antihypertensive medication. Target blood pressure was defined as a systolic blood pressure (SBP) <140 mmHg and diastolic blood pressure (DBP) <90 mmHg after 6 months of triple combination therapy. Multivariate logistic regression analyses were performed to analyze the associated factors for target blood pressure achievement. RESULTS: Among the 348 study participants, 317 completed 6 months of treatment. The target achievement rate was 76.3% (242/317). The mean absolute difference and 95% confidence interval (CI) for the SBP and DBP were 10.8 mmHg (8.8 to 12.7) and 6.4 mmHg (5.1 to 7.8), respectively (P<0.05). The odds ratio (OR) for the target blood pressure achievement increased in those with college education or higher (OR, 2.69; 95% CI, 1.22–5.92), those with dyslipidemia (OR, 1.74; 95% CI, 1.01–2.99), and those who were satisfied with the medication (OR, 29.91; 95% CI, 3.70–241.92). CONCLUSIONS: The presence of dyslipidemia and patient's satisfaction with the medication were associated with target blood pressure achievement in our analyses. Our findings suggest the importance of patient's factor in the control of blood pressure.

Associated Factors for Target Blood Pressure Achievement after Triple Combination Therapy in Hypertensive Patients

BACKGROUND@#The prevalence of hypertension reaches 29% in adults over 30 years of age in the Korean population; however, the control rate is merely 44%. The aim of this study was to investigate the associated factors for target blood pressure achievement after triple combination therapy in hypertensive patients.@*METHODS@#From February 2016 to May 2018, 10 family physicians recruited 348 patients, who newly started a triple combination antihypertensive medication. Target blood pressure was defined as a systolic blood pressure (SBP) <140 mmHg and diastolic blood pressure (DBP) <90 mmHg after 6 months of triple combination therapy. Multivariate logistic regression analyses were performed to analyze the associated factors for target blood pressure achievement.@*RESULTS@#Among the 348 study participants, 317 completed 6 months of treatment. The target achievement rate was 76.3% (242/317). The mean absolute difference and 95% confidence interval (CI) for the SBP and DBP were 10.8 mmHg (8.8 to 12.7) and 6.4 mmHg (5.1 to 7.8), respectively (P<0.05). The odds ratio (OR) for the target blood pressure achievement increased in those with college education or higher (OR, 2.69; 95% CI, 1.22–5.92), those with dyslipidemia (OR, 1.74; 95% CI, 1.01–2.99), and those who were satisfied with the medication (OR, 29.91; 95% CI, 3.70–241.92).@*CONCLUSIONS@#The presence of dyslipidemia and patient's satisfaction with the medication were associated with target blood pressure achievement in our analyses. Our findings suggest the importance of patient's factor in the control of blood pressure.

An Overview of Current Physical Activity Recommendations in Primary Care / 가정의학회지

Primary care physicians should encourage their patients to engage in adequate physical activity. Current recommendations for physical activity in adults are as follows: at least 150–300 minutes per week of moderate-intensity, 75–150 minutes per week of vigorous-intensity aerobic physical activity, or an equivalent combination of moderate- and vigorous-intensity aerobic activity. Adults should also perform muscle-strengthening activities of moderate intensity or higher that involve all major muscle groups for 2 or more days per week. The elderly should perform additional balance training and fall prevention exercises more than 3 times a week. Children and adolescents should perform at least 1 hour of moderate-to-vigorous physical activity daily, which includes vigorous aerobic activity at least 3 days per week. As part of their 60 minutes or more of daily physical activity, resistance training and bone strengthening exercise should be done at least 3 days per week. According to new evidence, one bout of any exercises can be shorter than 10 minutes. Previously, physical activities were recommended for more than 10 minutes. For patients with diabetes, it is advisable to perform resistance exercise or short-distance running before aerobic exercise to prevent hypoglycemia. New evidence shows that dynamic resistance training is safe and effective in patients with hypertension provided the load is not too heavy. Exercise reduces pain and improves quality of life and physical function in patients with osteoarthritis,. Therefore, the treatment guidelines for osteoarthritis have been changed recently from not recommending exercise to highly recommending it.

Development of the Perceived Stress Inventory: A New Questionnaire for Korean Population Surveys / 가정의학회지

BACKGROUND: Given emerging evidence of the association between stress and disease, practitioners need a tool for measuring stress. Several instruments exist to measure perceived stress; however, none of them are applicable for population surveys because stress conceptualization can differ by population. The aim of this study was to develop and validate the Perceived Stress Inventory (PSI) and its short version for use in population surveys and clinical practice in Korea. METHODS: From a pool of perceived stress items collected from three widely used instruments, 20 items were selected for the new measurement tool. Nine of these items were selected for the short version. We evaluated the validity of the items using exploratory factor analysis of the preliminary data. To evaluate the convergent validity of the PSI, 387 healthy people were recruited and stratified on the basis of age and sex. Confirmatory analyses and examination of structural stability were also carried out. To evaluate discriminatory validity, the PSI score of a group with depressive symptoms was compared with that of a healthy group. A similar comparison was also done for persons with anxious mood. RESULTS: Exploratory factor analysis supported a three-factor construct (tension, depression, and anger) for the PSI. Reliability values were satisfactory, ranging from 0.67 to 0.87. Convergent validity was confirmed through correlation with the Perceived Stress Scale, Center for Epidemiologic Studies Depression Scale, and State-Trait Anxiety Inventory. People with depressive or anxious mood had higher scores than the healthy group on the total PSI, all three dimensions, and the short version. CONCLUSION: The long and short versions of the PSI are valid and reliable tools for measuring perceived stress. These instruments offer benefits for stress research using population-based surveys.

Effects of Home-Based Pulmonary Rehabilitation with a Metronome-Guided Walking Pace in Chronic Obstructive Pulmonary Disease

Despite documented efficacy and recommendations, pulmonary rehabilitation (PR) in chronic obstructive pulmonary disease (COPD) has been underutilized. Home-based PR was proposed as an alternative, but there were limited data. The adequate exercise intensity was also a crucial issue. The aim of this study was to investigate the effects of home-based PR with a metronome-guided walking pace on functional exercise capacity and health-related quality of life (HRQOL) in COPD. The subjects participated in a 12-week home-based PR program. Exercise intensity was initially determined by cardiopulmonary exercise test, and was readjusted (the interval of metronome beeps was reset) according to submaximal endurance test. Six-minute walk test, pulmonary function test, cardiopulmonary exercise test, and St. George's Respiratory Questionnaire (SGRQ) were done before and after the 12-week program, and at 6 months after completion of rehabilitation. Thirty-three patients participated in the program. Six-minute walking distance was significantly increased (48.8 m; P = 0.017) and the SGRQ score was also improved (-15; P < 0.001) over the six-month follow-up period after rehabilitation. There were no significant differences in pulmonary function and peak exercise parameters. We developed an effective home-based PR program with a metronome-guided walking pace for COPD patients. This rehabilitation program may improve functional exercise capacity and HRQOL.

Factors Associated with Compliance Using Diamicron in Patients with Type 2 Diabetes

BACKGROUND: Diabetes mellitus (DM) is one of the most important chronic diseases in public health, thus optimal management of this condition is crucial. For this purpose, oral hypoglycemic agents (OHA) are commonly prescribed with their consistent use being mandatory to maintain adequate blood glucose levels. We aimed to evaluate the compliance with OHA in patients with DM, and to determine the factors associated with compliance. METHODS: From March 2006 to December 2007, we enrolled patients with type 2 DM who were newly diagnosed or had discontinued OHAs for more than four weeks. For OHA, diamicron was prescribed to the participants and response to medication was evaluated by physicians after 12 weeks. Compliance was defined as patients taking diamicron continuously or stopping the medication due to well-controlled blood sugar levels. Demographic characteristics, anthropometric measurements, fasting glucose, and lipid profiles were collected and analyzed. RESULTS: The mean age of our 326 subjects was 56.0+/-9.9 years and 74.5% was defined to be compliant. Logistic regression analysis adjusting for age and sex revealed that combined medication use (odd ratio [OR], 2.03; 95% confidence interval [CI], 1.04-3.97) and diabetes-related nutritional education (OR, 2.08; 95% CI, 1.08-4.03) (P<0.05) were factors associated with compliance with OHA. CONCLUSIONS: About three quarters of the DM patients in our study, using diamicron for the first time, showed compliance after 12 weeks of treatment. Concomitant medications and diabetes-related nutrition education were associated with compliance.

The Efficacy and Safety of a Combined Alendronate and Calcitriol Agent (Maxmarvil): A Postmarketing Surveillance Study in Korean Postmenopausal Women with Osteoporosis / 가정의학회지

BACKGROUND: Combined therapy with alendronate and calcitriol may have additive effects on bone density. An observational study was performed to evaluate the efficacy and safety of Maxmarvil, a combinative agent of alendronate (5 mg) and calcitriol (0.5 microg), and to identify factors associated with efficacy. METHODS: A total of 568 postmenopausal women with osteoporosis were enrolled by family physicians in 12 hospitals. The study subjects took Maxmarvil daily for 12 months. Questionnaires about baseline characteristics, socioeconomic status, and daily calcium intake were completed at the first visit. Adverse events were recorded every 3 months and bone mineral density (BMD) in the lumbar spine was measured using dual-energy X-ray absorptiometry at baseline and after 12 months. We evaluated the efficacy and safety of Maxmarvil, and the factors related to BMD improvement. RESULTS: A total of 370 patients were included in final analysis. The median BMD was 0.81 +/- 0.12 g/cm2 at pre-treatment and 0.84 +/- 0.13 g/cm2 after one year. The average BMD improvement was 3.4% +/- 6.4% (P < 0.05), and 167 (45.1%) patients showed improvement. Factors associated with improved BMD were continuation of treatment (odds ratio [OR], 2.41; 95% confidence interval [CI], 1.15 to 5.07) and good compliance (OR, 2.54; 95% CI, 1.29 to 5.00). Adverse events were reported by 35 of the 568 patients, with the most common being abdominal pain and dyspepsia. CONCLUSION: Maxmarvil was found to be safe, well tolerated and effective in osteoporosis treatment. Continuation of treatment and good compliance were the factors associated with efficacy.

The metabolic syndrome and sports medicine

The metabolic syndrome may lead to cardiovascular disease. A greater number of physical activities and better fitness decrease the prevalence and incidence of metabolic syndrome. Exercise increases insulin sensitivity and longer activities make the effect greater. Studies have shown that physical activity is also helpful in treating the metabolic syndrome. Moderate aerobic physical activity for more than 30 minutes almost every day (at least 5 or more days a week) is recommended to prevent and treat the metabolic syndrome. Moderate aerobic physical activity for more than 150 minutes total per week with intermittent resting days may be effective in managing the metabolic syndrome. Intermittent activity for periods of at least 10 minutes has been shown to be as effective as continuous activity. Examples of moderate activities are walking, brisk walking, table tennis, vacuuming, and playing drums. For a more accurate exercise prescription, a target heart rate can be used, calculated by the formula: 'target heart rate = intensity x (maximal heart rate - resting heart rate) + resting heart rate'. The intensity for moderate physical activities is 40% to 50%. Maximal heart rate is assumed to be '220-age'. Resistance exercise two or three times a week per muscle group is also recommended. Reducing sedentary life habits such as watching TV, playing video games, and working on a computer is recommended, too. The more physical activities in everyday life, the better the results for the metabolic syndrome. However, the exact amount of physical activity for the metabolic syndrome should be determined by further studies in Korea. Physical activity is an essential tool in the prevention and treatment of the metabolic syndrome.

In vivo tracing of superparamagnetic iron oxide-labeled bone marrow mesenchymal stem cells transplanted for traumatic brain injury by susceptibility weighted imaging in a rat model / 中华创伤杂志(英文版)

<p><b>OBJECTIVE</b>To label rat bone marrow mesenchymal stem cells (BMSCs) with superparamagnetic iron oxide (SPIO) in vitro, and to monitor the survival and location of these labeled BMSCs in a rat model of traumatic brain injury (TBI) by susceptibility weighted imaging (SWI) sequence.</p><p><b>METHODS</b>BMSCs were cultured in vitro and then labeled with SPIO. Totally 24 male Sprague Dawley (SD) rats weighing 200-250 g were randomly divided into 4 groups: Groups A-D (n equal to 6 for each group). Moderate TBI models of all the rats were developed in the left hemisphere following Feeney's method. Group A was the experimental group and stereotaxic transplantation of BMSCs labeled with SPIO into the region nearby the contusion was conducted in this group 24 hours after TBI modeling. The other three groups were control groups with transplantation of SPIO, unlabeled BMSCs and injection of nutrient solution respectively conducted in Groups B, C and D at the same time. Monitoring of these SPIO-labeled BMSCs by SWI was performed one day, one week and three weeks after implantation.</p><p><b>RESULTS</b>Numerous BMSCs were successfully labeled with SPIO. They were positive for Prussian blue staining and intracytoplasm positive blue stained particles were found under a microscope (200). Scattered little iron particles were observed in the vesicles by electron microscopy (5000). MRI of the transplantation sites of the left hemisphere demonstrated a low signal intensity on magnitude images, phase images and SWI images for all the test rats in Group A, and the lesion in the left parietal cortex demonstrated a semicircular low intensity on SWI images, which clearly showed the distribution and migration of BMSCs in the first and third weeks. For Group B, a low signal intensity by MRI was only observed on the first day but undetected during the following examination. No signals were observed in Groups C and D at any time points.</p><p><b>CONCLUSION</b>SWI sequence in vivo can consecutively and noninvasively trace and demonstrate the status and distribution of BMSCs labeled with SPIO in the brain of TBI model rats.</p>

Characteristic analysis on susceptibility weighted imaging of intravitreous foreign body of autologous eyelashes in rabbits / 中华创伤杂志(英文版)

<p><b>OBJECTIVE</b>To explore the characteristics of susceptibility weighted imaging (SWI) of the intravitreous foreign body of autologous eyelashes in rabbits.</p><p><b>METHODS</b>A total of 12 New Zealand white rabbits, either sex, weighing 2.5-3.5 kg, and provided by the Experimental Animal Center of Henan Province were employed in this study. For each rabbit, 5 autologous eyelashes (1 cm in length and 0.2-0.3 mm in diameter) were implanted into the right ocular vitreum, while the left control ocular vitreum received sham operation but nothing was implanted. SWI sequential test was made 2 hours postoperatively. Then the rabbits were killed and the specimens of the vitreous bodies of the rabbits were obtained. Hematoxylin and eosin staining and histological examinations were performed.</p><p><b>RESULTS</b>The autologous eyelashes in 8 ocular vitreums of rabbits showed linear low signal intensity on the magnitude images and susceptibility weighted images, but linear high signal intensity on the phase images. Among the 12 experimental rabbits, 5 eyelashes in the right vitreum were completely shown in 3 rabbits, partly shown in 5 rabbits (2 eyelashes shown in 3 rabbits and 3 eyelashes shown in 2 rabbits), and not shown in 4 rabbits.</p><p><b>CONCLUSIONS</b>SWI of the foreign body of intravitreous autologous eyelashes in rabbits has its own characteristics. The combined application of SWI sequential magnitude images, susceptibility weighted images and phase images is helpful to the detection and diagnosis of intravitreous autologous eyelashes in rabbits.</p>

A Randomized Controlled Trial of SMS Text Messaging versus Postal Reminder to Improve Attendance after Lipid Lowering Therapy in Primary Care / 가정의학회지

BACKGROUND: In the primary care setting, compliance with lipid lowering therapy was relatively low. In order to compare the efficacy of a short messaging service (SMS) text messaging and postal reminder as means of improving attendance rates during the first 24 weeks of lipid-lowering therapy, a randomized controlled trial of 918 patients from 19 family practice clinics was conducted between February 2003 and June 2006. METHODS: Patients were randomly assigned into 3 groups: SMS (327), postal (294),and control (297) group. To ascertain attendance rates, patients were followed up at 24 weeks after their treatment. Reminders were sent at 16 weeks from the coordinating center. RESULTS: Overall attendance rate was 74.1%. This differed between groups, with 76.1% attendance for the SMS group, 73.5% for the postal group, and 72.4% for the control group. According to a multivariate analysis, the SMS group had a significantly higher attendance rate (Odds ratios [OR] 1.48; 95% confidence interval [CI], 1.01 to 2.16) than the control group, but the postal group (OR, 1.15; 95% CI, 0.79 to 1.69) did not. Moreover, the cost per attendance for the SMS reminder (155 Korean Won [KRW]) was much lower than that for the postal reminder (722 KRW). CONCLUSION: SMS reminder may be more cost saving method to improve the attendance rate compared with the postal reminder.

Exercise Testing and Prescription / 한양의대학술지

The benefits of exercises and physical activities have been proven for all-cause mortality, cardiovascular morbidity and many illnesses. To workout safely, medical examination and exercise testing should be done prior to exercise. Cardiac disease and musculoskeletal problems should be ruled out by medical examination and test. The result of exercise testing is the basic data for exercise prescription because of wide range of fitness on the same age and sex. Cardiopulmonary endurance, muscle strength and endurance, flexibility and balance ability are the basic components of fitness measurement. Appropriate method to assess fitness among various methods can be used. Moderate aerobic exercise is recommended to be done more than 30minutes a day, 5 times a week. Recently 150 minutes of moderate exercise a week is being recommended. Vigorous aerobic exercise more than 20 minutes a day 3 times a week or 75 minutes a week is recommended. Muscle strengthening and endurance exercise is recommended to be done 2~3 times a week

Exercise Testing and Prescription / 한양의대학술지

The benefits of exercises and physical activities have been proven for all-cause mortality, cardiovascular morbidity and many illnesses. To workout safely, medical examination and exercise testing should be done prior to exercise. Cardiac disease and musculoskeletal problems should be ruled out by medical examination and test. The result of exercise testing is the basic data for exercise prescription because of wide range of fitness on the same age and sex. Cardiopulmonary endurance, muscle strength and endurance, flexibility and balance ability are the basic components of fitness measurement. Appropriate method to assess fitness among various methods can be used. Moderate aerobic exercise is recommended to be done more than 30minutes a day, 5 times a week. Recently 150 minutes of moderate exercise a week is being recommended. Vigorous aerobic exercise more than 20 minutes a day 3 times a week or 75 minutes a week is recommended. Muscle strengthening and endurance exercise is recommended to be done 2~3 times a week