These findings suggest that K-JCQ is valid and reliable for assessing psychosocial job stress among Korean workers. Macro-level decision latitude showed a separate factorial structure and was strongly associated with task-level decision latitude.

This study investigated the epidemiology (prevalence, risk factors, and impact on quality of life) of knee pain and its severity in elderly Koreans. The subjects (n=3,054) were participants aged ≥50 yr from the fifth Korea National Health and Nutrition Examination Survey, conducted in 2010. Knee pain was defined as pain in the knee lasting ≥30 days during the most recent 3 months; severity was categorized as mild, moderate, or severe. EQ-5D was used to measure quality of life. The prevalence of knee pain was 23.1% (11.7% in men, 31.9% in women). The prevalences of mild, moderate, and severe knee pain were 4.3%, 9.1%, and 9.7%, respectively (2.8%, 5.4%, and 3.5% in men and 5.4%, 12.0%, and 14.4% in women). Old age, female gender, a low level of education, a manual occupation, obesity, and radiographic osteoarthritis were risk factors for knee pain, and were associated with increased severity of knee pain. Excluding men with mild knee pain, people with knee pain had significantly lower quality of life than those without knee pain. Early interventional approaches are needed to reduce the medical, social, and economic burden of knee pain in elderly Koreans.

We evaluated alcohol consumption and alcohol-related problems in Korean adults by evaluating alcohol consumption and responses to the CAGE questionnaire obtained from the second Korea National Health and Nutrition Examination Survey. The age-adjusted prevalence of males who consumed 0, 0.1-20, 20.1-40, or >40 g/day of alcohol were 28.0, 51.5, 12.5, and 8.0%, respectively; 26.9% of male drinkers were CAGE-positive (≥2 affirmative responses to the CAGE). The age-adjusted prevalence of females who consumed 0, 0.1-10, 10.1-20, or >20 g/day of alcohol were 67.7, 26.6, 3.9, and 1.8%; 11.9% of female drinkers were CAGE-positive. The risk factors for high alcohol consumption were old age, low education level, smoking, and drinking onset at young ages in male drinkers, whereas low education level and smoking in female drinkers. The risk factors for a positive CAGE were young age, marriage, low education level, smoking, high amount of alcohol consumed on a single occasion, and high drinking frequency in male drinkers, whereas high household income, ex-smoking, high amount of alcohol consumed on a single occasion, and high drinking frequency in female drinkers. Our results suggest that high alcohol consumption and alcohol-related problems in Korean adults are not negligible and require intervention.

Objective :We estimated the number of Korean adults with back pain and evaluated population-based associated factors of back pain from a representative sample data from the Fourth Korea National Health and Nutrition Examination Survey. Methods : The number of Korean adults who experienced back pain (experienced patients), those who experienced back pain lasting for three or more months during the past year (chronic patients), and those who were currently suffering from back pain (current patients) were estimated by analyzing the data from the fourth Korea National Health and Nutrition Examination Survey conducted in 2007 using surveyfreq procedure of the SAS statistical package. Population-based odds ratios for being experienced, chronic, and current patient according to demographic (age and gender), socioeconomic (education and occupation), and lifestyle factors (smoking, drinking, and exercise) were estimated using surveylogistic procedure. Results : It was estimated that there were 5,554,256 (proportion, 15.4%; 95% CI, 4,809,466 -6,299,046) experienced patients, 2,060,829 (5.7%; 1,557,413-2,564,246) chronic patients, and 3, 084,188 (8.5%; 2,600,197 -3,568,179) current patients among 36,107,225 Korean adults aged 20-89 years in 2007. Each of explanatory variables was significantly associated with at least one of the response variables for back pain. Conclusion : Based on our study results, further efforts to investigate epidemiology of back pain, to evaluate associated factors, and to improve treatment outcomes are needed.