• The Journal of Korean Physical Therapy
• /
• v.14 no.4
• /
• pp.398-411
• /
• 2002

Objectives: The purpose of present study was to investigate the experience and point prevalence rate and factors related with Low Back Pain (LBP) in train egineers. Methods: Questionnaires were completed by 324 train engineers in Daejeon railroad administration from May 2002. The information was used to estimate odds ratio (OR) and 95$\%$ confidence intervals (CI) for factors relation to LBP. A retrospective study design was used. Results: The experience rate for LBP was 67.9$\%$, 54$\%$ in one year interval prevalence, 53.4$\%$ in 6 months interval prevalence, and 47.8$\%$ in a point prevalence rate. Variables significantly associated with LBP experience were age (p=0.0327), train vibration(p=0.0015), labour hour(p=0.0034), and pay(p=0.0534). As subjects got older, the higher experience for LBP was (OR=1.1, 95$\%$ CI 1.0-1.2). LBP experience rate for people who had felt train vibration was a higher than those who did not (OR=2.5, 95$\%$ CI 1.4-4.4, OR=2.3 95$\%$ CI 1.3-4.0 in a point prevalence). The people who worked for long hour was a higher than those who did not (OR=2.8, 95$\%$ CI 1.4-5.6, OR=2.2, 95$\%$ CI 1.1-4.5 in a point prevalence). The people who were not satisfied with pay was a higher than those who were (OR=1.7, 95$\%$ CI 1.0-3.0). Factors related to a point prevalence rate were train vibration(p=0.0027), chair vibration (p=0.0444), and labour hour(p=0.0340). LBP a point prevalence rate for people who had felt the vibration of train chair was a higher than those who did not (OR=1.8 95$\%$ CI 0.7-2.0). Conclusions: Results from present study indicated that a statistically significant factors associated with LBP experience were age, train vibration, labour hour, and pay, Factors related to a point prevalence rate were also train vibration, the vibration of train chair, and labour hour.

• The Journal of Korean Physical Therapy
• /
• v.14 no.4
• /
• pp.385-397
• /
• 2002

Objectives: This study was to investigate the experience and a Point prevalence rate and factors related with Low Back Pain (LBP) in instructors of drive institute. Methods: Questionnaires were completed by 174 instructors who worked at 13 drive institutes in 4 small cities from June 2002. The information was used to estimate odds ratio (OR) and 95$\%$ confidence intervals (CI) for factors relation to LBP. A retrospective study design was used. Results: The experience rate for LBP was 57.2$\%$, 43.4$\%$ in one year interval prevalence, 42.2$\%$ in 6 months interval prevalence, and 35.8$\%$ in a point prevalence rate. Factor significantly associated with LBP experience by logistic regression was labour hour (p=0.0034), subjects who worked for long hours a day were higher than those who did not (OR=3.8, 95$\%$ CI 1.4-5.6). Conclusions: In conclusion, labour hour was significantly associated with LBP experience.

• The Journal of Korean Physical Therapy
• /
• v.12 no.3
• /
• pp.331-338
• /
• 2000

Objectives: The objective of this study was to investigate the experience and point prevalence rate and factors related with Low Back Pain (LBP) in bin drivers. Methods: Questionnaires were completed by 200 drivers at 2 bus companies in Andong city in October.2000. The information was used to estimate odds ratio (OR) and $99\%$ confidence intervals (CI) for factors relation to LBP. A cross-section study design was used. Results: The experience rate for LBP was $53.5\%$, point prevalence rate was $31.5\%$. Variables significantly associated with LBP experience were employ duration and stress related occupation. The higher subjects had experienced stress. the higher experience for LBP was (OR=2.9, $95\%$ Cl 1.2-7.2). The longer subjects had employ duration in bus company, the higher experience far LBP was (OR=1.3, $95\%$ Cl 1.2-7.2). Significant factors relation to a week point prevalence far LBP were obesity and employ duration. LBP increased as weight increased (OR=4.1, Cl 1.6-10.7). The longer subjects has employ duration at bus company, the higher LBP is (OR=1.4. $95\%$ Cl 1.6-2.9). Conclusions: Results from this study indicated that a statistically significant factor relation to LBP was stress related occupation. employ duration, and obesity.

• The Journal of Internal Korean Medicine
• /
• v.32 no.1
• /
• pp.26-32
• /
• 2011

Objectives : Non-alcoholic fatty liver disease (NAFLD) is known to be increasing and becoming a health-related issue worldwide. This study aimed to analyze its prevalence and characterize NAFLD. Methods : NAFLD-related papers were surveyed via PubMed and in Korean medical journals, and then the prevalence and pathology were reviewed. Results : The prevalence of NAFLD in the general population is around 10~30% worldwide. The prevalence of NAFLD in Korea is estimated as 15~30%, which is higher than in China and Japan. The most important etiological-factors of NAFLD include central obesity resulting from excessive calorie intake and less physical activity, which lead to adiponectin hypoactivity and insulin resistance. The Oriental medicine view point of NAFLD pathology is phlegm-dampness by dysfunction of free flow in liver. Conclusions : This study provided an overview of the prevalence and pathology of NAFLD, and can support the development of a strategy for traditional Korean medicine-based prevention or treatment of NAFLD.

• Asian Pacific Journal of Cancer Prevention
• /
• v.16 no.13
• /
• pp.5493-5498
• /
• 2015

Due to the lack of nationwide population-based cancer registration, the total cancer prevalence in Iran is unknown. Our previous work in which we used a basic network scale-up (NSU) method, failed to provide plausible estimates of total cancer prevalence in Kerman. The aim of the present study was to estimate total and partial prevalence of cancer in southeastern Iran using an adapted version of the generalized network scale-up method. A survey was conducted in 2014 using multi-stage cluster sampling. A total of 1995 face-to-face gender-matched interviews were performed based on an adapted version of the NSU questionnaire. Interviewees were asked about their family cancer history. Total and partial prevalence were estimated using a generalized NSU estimator. The Monte Carlo method was adopted for the estimation of upper/lower bounds of the uncertainty range of point estimates. One-yr, 2-3 yr, and 4-5 yr prevalence (per 100,000 people) was respectively estimated at 78 (95%CI, 66, 90), 128 (95%CI, 118, 147), and 59 (95%CI, 49, 70) for women, and 48 (95%CI, 38, 58), 78 (95%CI, 66, 91), and 42 (95%CI, 32, 52) for men. The 5-yr prevalence of all cancers was estimated at 0.18 percent for men, and 0.27 percent for women. This study showed that the generalized familial network scale-up method is capable of estimating cancer prevalence, with acceptable precision.

• Korean Journal of Veterinary Research
• /
• v.47 no.4
• /
• pp.417-423
• /
• 2007

Serological surveillance programs in animal populations are becoming increasingly important to estimate prevalence of a specific disease and subsequently to document disease-free status in a region or a country. For these purposes, the programs need to be based on both theoretical and economical aspects from the designing phase. From Aujeszky's disease (AD)-eradication program point of view, group of animals (aggregates, herds) not individual animal is the more important sampling unit of concern. In this study the authors therefore attempted to compute an appropriate sample size tailored to a current surveillance program against AD, assuming that the goal of this program is either herd-level prevalence estimation or documentation of AD-freedom. For prevalence estimation, assuming a finite population with imperfect sensitivity (Se) and specificity (Sp) of ELISA kit for AD diagnosis, the number of herds present, expected herd prevalence, and desired accuracy for a certain level of confidence, sample size was estimated at herd-level in the first stage and individual animal-level in the second stage. A two-stage sampling design was used to calculate a sample size to indicate AD-freedom. In this instance, the computation was based on the possible detection of a predetermined prevalence at a certain herd-level Se and Sp. This study indicated that the sample size varied with predetermined confidence, tolerance, Se and Sp at herd- and animal-level, and within- and among-herd prevalence. In general, smaller sample size was required to estimate AD prevalence than to document of AD-freedom. Compared to individual-based samples, two-stage sampling strategy requires a larger sample size to show disease-freedom. Statistical considerations including herd-level test characteristics when designing surveillance program also are further discussed.

• The Journal of Korean Physical Therapy
• /
• v.12 no.2
• /
• pp.7-15
• /
• 2000

Objectives: The purpose of this study w8s to investigate the experience rate and point prevalence and factors related with Low Back Pain(LBP) in men workers for the manufacturing industry. Methods: Questionnaires were completed by 97 men workers for 1 vehicle company in Taegu city in September 6-26, 2000. The information was used to estimate odds ratio and $95\%$ confidence intervals fur the LBP related factors association. Results: The experience rate for LBP was $67.0\%$. point prevalence was $14.4\%$. Variables significantly associated with LBP were weight(p=0.052) and smoking(p=0.010). $57\%$ for patients with LBP was higher than 50.095 far without in normal weight. whereas $43.0\%$ for patients with LBP was smaller than $50.0\%$ for without in overweight. $73.8\%$ for patients with smoking increased than $46.9\%$ for smokers without in smoking. The experience for LBP increased as weight increased(Odds ratio=2.923). As subjects are getting older. experience increased(Odds ratio= 1.393). The higher subjects had experienced stress, the higher experience for LBP was(Odds ratio= 1.328), however all three variables had no significant relationship. Conclusions: Results from this study indicated that a statistically significant association between LBP and weight. smoking in X2-test. In logistic regression test, there were no related variables.

• Korean Journal of Psychosomatic Medicine
• /
• v.21 no.2
• /
• pp.122-131
• /
• 2013

Objectives: This study aimed to examine the point prevalence of anxiety, depression and the associated risk factors in hospitalized patients with cancer. Methods: A total of 114 patients with cancer who admitted to the Cancer Center in St. Mary's Hospital were enrolled for a day. The patients were asked to complete Hospital Anxiety and Depression Scale(HADS). Sociodemographic and cancer related clinical variables were also evaluated. Results: The point prevalence of anxiety and depression was 10.5% and 34.2%, respectively, as assessed with HADS. Logistic regression models revealed that distant metastasis was significantly associated with anxiety in patients with cancer and previous chemotherapy and Low socioeconomic status were significantly associated with depression. Conclusions: Our results indicate that more than one third of patients with cancer suffer from either anxiety or depression. In addition, previous chemotherapy as well as low socioeconomic status and distant metastasis were associated risk factors of anxiety and depression, respectively. These findings suggest the need for screening and systematized psychosocial intervention for psychological distress in hospitalized patients with cancer.

• Communications for Statistical Applications and Methods
• /
• v.25 no.3
• /
• pp.297-306
• /
• 2018

Cardiovascular disease (CVD) is the leading cause of death worldwide and has a high mortality rate after onset; therefore, the CVD management requires the development of treatment plans and the prediction of prevalence rates. In our study, age, income, education level, marriage status, diabetes, and obesity were identified as risk factors for CVD. Using these 6 factors, we proposed a nomogram based on a $na{\ddot{i}}ve$ Bayesian classifier model for CVD. The attributes for each factor were assigned point values between -100 and 100 by Bayes' theorem, and the negative or positive attributes for CVD were represented to the values. Additionally, the prevalence rate can be calculated even in cases with some missing attribute values. A receiver operation characteristic (ROC) curve and calibration plot verified the nomogram. Consequently, when the attribute values for these risk factors are known, the prevalence rate for CVD can be predicted using the proposed nomogram based on a $na{\ddot{i}}ve$ Bayesian classifier model.

• Journal of Preventive Medicine and Public Health
• /
• v.36 no.1
• /
• pp.63-70
• /
• 2003

Objectives : To investigate the prevalence of cognitive impairment and dementia in elderly people, aged 65 or above, residing in Busan Metropolitan City. Methods : Total of 1,101 old people, aged 65 or above, living in Busan as of December 31, 2001 were selected using stratified three-stage cluster sampling. Cognitive impairment was determined from the MMSE-K score, and dementia confirmed from five psychometric measures and the Barthel index. The crude prevalence, sex-age adjusted for the Korean population, were obtained. Results : With the cut-off point for cognitive impairment was set at 24 points, or below, on the MMSE-K scale, the crude rate of cognitive impairment was 29.3% (15.7% for men and 37.5% for women), and the sex-age adjusted prevalence was 30.5% (17.5% for men and 37.0% for women). When the cut-off point for cognitive impairment was set at 20 points, or below, on the MMSE-K scale, the crude rate of cognitive impairments were 10.0% (4.1% for men and 13.5% for women), and 10.6% (4.7% for men and 13.1% for women), respectively. The crude dementia, and the sex-age adjusted rates were 7.4% (2.4% for men and 10.5% for women), and 8.0% (2.7% for men and 10.0% for women), respectively. Conclusions : The prevalence of dementia in this study was somewhat lower than that reported by other domestic and foreign studies. Our results related to the difference in time and space, diagnostic tools, response rates, and distribution of male and female subjects, etc.