Factors Associated with Sleep Duration in Korean Adults: Results of a 2008 Community Health Survey in Gwangju Metropolitan City, Korea

류소연,김기순,한미아 대한의학회 2011 Journal of Korean medical science Vol.26 No.9

Short (≤ 6 hr) and long (≥ 9 hr) sleep durations are both associated with risk factors for cardiovascular diseases and diabetes, depression, learning problems, accidents and excess mortality. However, little is known about factors associated with sleep duration in Korean adults. This study examined sleep patterns in Korean adults and identified factors associated with short and long sleep durations. This study analyzed cross-sectional data collected from 4,411 Korean adults aged 19 yr and older who participated in a community health survey conducted in Gwangju, Korea. Multinomial logistic regression analysis was used to identify associations between socio-demographic and health-related factors and short or long sleep durations. Of the population, 37.2% and 4.0% reported short and long sleep,respectively. Short sleep was associated with older age, lower levels of income, night or shift work, heavy smoking, and depression or anxiety; long sleep was associated with younger age, being divorced or widowed, heavy smoking, underweight, depression or anxiety, and poorer self-reported health. In conclusion, a relatively high prevalence of short sleep duration is identified in this population of Korean adults. Factors associated with short or long sleep may act as potential confounders of the relationship between sleep duration and health outcomes.

농촌 지역 주민의 혈청 Ferritin 수준과 대사증후군과의 관련성

류소연,김기순,박종,강명근,한미아,Ryu, So-Yeon,Kim, Ki-Soon,Park, Jong,Kang, Myeng-Guen,Han, Mi-Ah 대한예방의학회 2008 예방의학회지 Vol.41 No.2

Objectives : The purpose of this study was to examine the relationship between serum ferritin and the metabolic syndrome (MS). Methods : We conducted a cross-sectional study of 1,444 adults over age 40 and under age 70 that lived in a rural area and participated in a survey conducted as part of the Korean Rural Genomic Cohort Study (KRGCS). The MS was defined as the presence of at least three of the followings : elevated blood pressure, low high density lipoprotein cholesterol, elevated serum triglycerides, elevated plasma glucose, or abdominal obesity. After adjustment for age, alcohol intake, menopausal status, body mass index (BMI), high sensitivity C-reactive protein (hs-CRP), and alanine aminotransferase (ALT), odds ratios (ORs) for the prevalence of the MS by sex were calculated for quartiles of serum ferritin using logistic regression analysis. Results : The MS was more common in those persons , with the highest levels of serum ferritin, compared to persons with the lowest levels, in men (37.1% vs. 22.4%, p=0.006) and women (58.8% vs. 34.8, p<0.001). In both sexes, the greater the number of MS components presents, the greater the serum ferritin levels. After adjustment for age, alcohol intake, and menopausal status, the OR for metabolic syndrome, comparing the fourth quartile of ferritin with the first quartile, was 2.21 (95% confidence interval; CI=1.26-3.87; p-trend=0.024) in men and 2.10 (95% CI=1.40-3.17; p-trend=0.001) in women. However, after further adjustment for BMI, hs-CRP, and ALT, the ORs were statistically attenuated in both sexes. Conclusions : Moderately elevated serum ferritin levels were not independently associated with the prevalence of the MS after adjusting for other risk factors. Further studies are needed to obtain evidence concerning the association between serum ferritin levels and the MS.

PZT-PYW 세라믹스의 조성변화가 경도 및 인성에 미치는 영향

류소연,임대순,윤석진,김현재 한국세라믹학회 1994 한국세라믹학회지 Vol.31 No.3

In this paper, a change of fracture toughness and hardness in PZT-PYW ceramics system before and after poling treatment was measured to investigate the effect of composition on the mechanical properties in PZT-PYW ceramics. The hardness of the PZT-PYW ceramics increased with increasing mole fraction of PYW. The fracture toughness achieved maximum values for x=0.03. Both of the hardness and the fracture toughness also increased with poling treatment. The variation of both hardness and fracture toughness with increasing PYW mole fracture was explained by the change in microstructures such as grain size and second phase. The difference in hardness and fracture toughness in the electrically poled and unpoled specimens was also explained on the bases of internal stress.

Drinking Patterns Among Korean Adults: Results of the 2009 Korean Community Health Survey

류소연,Catherine M. Crespi,Annette E. Maxwell 대한예방의학회 2013 예방의학회지 Vol.46 No.4

Objectives: In Korea, the proportion of deaths due to alcohol is estimated at 8.9%, far exceeding the global estimate of 3.8%. Therefore,this study was performed to examine the factors associated with low-risk, moderate-risk, and high-risk drinking patterns in Korean adults and to identify target populations for prevention and control of alcohol-related diseases and deaths. Methods: We analyzed data from 230 715 Korean adults aged 19 years and older who participated in the 2009 Korean Community Health Survey. Multinomial logistic regression analysis was used to examine associations between socio-demographic and health-related factors and patterns of alcohol use. Results: A substantially larger proportion of men than women engaged in high risk (21.2% vs. 3.4%) and moderate-risk alcohol use (15.5%vs. 8.2%). In both sexes, moderate- and high-risk uses were associated with younger age, higher income, being currently employed, smoking,being overweight/ obese, and good self-rated health. Conclusions: Given the large proportion of the population that is engaging in moderate- and high-risk drinking and given the social norms that support this behavior, public health policies and campaigns to reduce alcohol consumption targeting the entire population are indicated.

중학생의 우울 및 자아존중감과 흡연 경험과의 관련성

류소연,박요섭 한국모자보건학회 2007 한국모자보건학회지 Vol.11 No.2

Objectives: This study was performed to find the association between smoking experiences and psychological factors such as depression and self-esteem in middle school students. Methods: The data were collected by self-administered questionnaires from 1,995 students in 10 middle schools in a district of Gwangju, and analysed using chi-square test, t-test and multiple logistic regression analysis. Results: The rate of smoking experience was 29.6% for male and 14.5% for female students (p<0.05). Students who had ever smoked were more depressed and lower self- esteem than those who did not smoke. After adjustment for the effect of potential covariates, those students who depressed were more likely to have smoking experiences (aOR= 1.87, 95% CI=1.51~2.31), compared with who did not depressed. And those students in the highest 25% (4th quartile) of the self-esteem were less likely to have smoking experiences (aOR=0.61, 95% CI=0.38~0.87), compared with the lowest quartile group. Conclusions: The results of this study suggest that psychological factors were associated with student smoking. There is therefore a need for school-based smoking prevention programs, which deal comprehensively with socio-demographic factors, environmental factors and psychological factors that influence smoking. 본 연구는 중학생을 대상으로 흡연 경험에 대한 실태와 관련요인을 파악하고, 우울과 자아존중감 등 심리적 특성과 흡연 경험과의 관련성을 알아보고자 시행되었다. 연구대상은 10개 중학교 1, 2, 3학년 남, 여학생 1995명이었으며, 자기기입식 설문지를 이용하여 자료를 수집하였고, 카이제곱검정과 t-검정, 로지스틱 회귀분석을 이용하여 분석하였다. 연구결과 흡연경험율은 남, 여 각각 29.6%, 14.5 %이었고, 현재 흡연율은 남학생 7.6%, 여학생 3.9%로 통계학적으로 유의한 차이를 보였다. 흡연 경험과 관련이 있는 요인으로는 학년, 가족형태, 용돈, 학교생활 만족도, 방과 후 생활, 친구, 형제 및 부모의 흡연, 흡연에 대한 인식 등이었다. 흡연 경험이 있는 학생이 비흡연 학생에 비해 우울정도가 유의하게 높았고, 자아존중감은 유의하게 낮았다. 제반 요인을 통제한 상태에서 우울군이 비우울군에 비해 흡연 경험에 대한 교차비는 1.87 (95% 신뢰구간: 1.51~2.31)이었고, 자아존중감 점수를 사분위수로 나누었을 때 가장 낮은 군에 비해 가장 높은 군의 흡연 경험 교차비는 0.61 (95% 신뢰구간: 0.38~0.87)로 심리적 요인은 흡연경험과 유의한 관련이 있었다. 결론적으로 중학생의 흡연 예방과 금연 유도를 위해서는 개인적 및 사회적 요인과 함께 심리적 요인을 고려한 전략이 포함된 프로그램 개발이 이루어져야 할 것으로 생각된다.

혈중 감마지티피와 청소년 대사증후군과의 관련성

류소연,신민호,권순석,박형철 한국모자보건학회 2008 한국모자보건학회지 Vol.11 No.3

Objectives : This study was performed to investigate the association between serum gamma-glutamyltransferase (GGT) and the metabolic syndrome (MS) in Korean adolescents. Methods : Data were obtained from 1,372 students aged 12~13y with normal liver functions of 7 middle schools in a district of Gwang-ju. Serum GGT, alanine aminotransferase (ALT), body mass index(BMI), waist circumference, blood pressure, fasting glucose and lipid profiles were measured. MS was defined by criteria analogous to ATP Ⅲ as ≥3 of the following: 1) fasting triglycerides ≥100 mg/dL, 2) HDL-cholesterol <50 mg/dL, 3) fasting glucose ≥110 mg/dL, 4) waist circumference >75th percentile for age and gender, and 5) systolic blood pressure >90th percentile for gender, age, and height. GGT quartiles were formed in assessing the likelihood of MS in logistic regression models that controlled for confounders such as sex, overweight and serum ALT. Results : The prevalence of MS was 5.2% (5.6% for male and 4.9% for female). The MS and its components were significantly related to increased serum GGT level except for HDL-cholesterol and fasting glucose. After the adjustment for sex, overweight and serum alanine aminotransferase (ALT), the association with the MS was attenuated, but the OR for MS was 2.06 (95% Confidence Interval: 1.02~4.17) in the highest compared with the lowest quartile of serum GGT. Conclusions : This study shows that serum GGT level, even within its normal range, is associated with the MS in Korean adolescents.

일부 농촌주민의 혈압과 사회적 지지도와의 관련성

류소연,이철갑,박종,김기순,Ryu, So-Yeon,Lee, Chul-Gab,Park, Jong,Kim, Ki-Soon 대한예방의학회 2001 Journal of Preventive Medicine and Public Health Vol.34 No.4

Objectives : This study was peformed to assess the association between the social support and blood pressure(BP) in a rural community. Methods : A cross-sectional survey, comprising a health examination including BP, height and weight and a questionnaire-based interview which investigated social support, demographic factors, smoking, drinking, and etc. was peformed between February 10th and March 5th, 1998. The survey included 318 persons who were over than 30-year-old in the rural community of Kwangju, Republic of Korea. We excluded persons who taking antihypertensive medications or who provided incomplete information; we subsequently analyzed the data from 284 persons. In order to test the hypothesis of an association between BP and social support controlling confounders such as age, educational level, working time, body mass index, smoking and drinking, the data was analyzed using multiple linear regression analysis. Results : The subjects were composed of 109(38.4%) males and 175(61.6%) females with mean ages of 62.0 years and 61.1 years, respectively. The hypertension prevalence was 41.3% among males and 45.1% among females. In the correlation analysis, higher total social support scores correlated significantly with lower systolic BP in both males and females. The hypertension prevalence increased significantly with the decreasing of the social support in males. In multiple regression analysis, systolic and diastolic blood pressure showed a negative association with social support in both males and females, although this was not statistically significant. Conclusions : Larger and broader studies are required in the future in order to identify the association between the social support and BP.

Enhanced Moisture Resistance of Salt Core through 2D Kaolinite Colloidal Solution Coating

류소연,최지원,류아롬,전민석,김동균,홍기원,남산 한국센서학회 2023 센서학회지 Vol.32 No.3

This study aimed to improve the moisture resistance of salt cores by investigating the suitability of a two-dimensional kaolinite colloidal solution and a commercially available SiO2 ink solution as coating agents. X-ray diffraction analysis (XRD) results showed that the intercalation of urea into kaolinite did not significantly change its layer structure. Scanning electron microscopy (SEM) images revealed that the dip-coating only affected the surface of the salt core, and the texture of the surface is differ depending on the coating solution. The humidity absorption test results showed that both coatings reduced the hygroscopicity of the salt core by more than 50%. However, in the water-solubility test, the kaolinite dissolved with the salt core, whereas the SiO2-coated salt core left a residue. These results strongly suggest that with the coating of the exfoliated kaolinite solution, salt core will remain stable in humid environments.

일부 의과대학생의 음주 실태와 관련 요인

류소연,윤혜은,김기순,박종,강명근,박계남 朝鮮大學校 附設 醫學硏究所 2004 The Medical Journal of Chosun University Vol.29 No.2

Objectives : This study was performed to investigate the drinking status and the related factors with problem drinking in some medical students. Methods : The study subjects were 345 premedical students (freshmen and sophomore) and medical students (sophomore) in a medical school who replied to the self-administered questionnaire survey during March 2002. The questionnaire was composed of general characteristics, drinking status, social value about drinking, health status, satisfaction of life and alcohol use disorders identification test (AUDIT) . Results : The experience rate of drinking was 88.8% in male and 88.3% in female and it was tended to increase with going up the grade. Prevalence of hazardous, dependence, harmful and problem drinking classified by AUDIT score criteria were 66.2%, 3.0%, 7.0% and 5.1% in male and 34.9%, 0.9%, 1.9%, 1.9% in female. In male, the statistically significant related factors to Al JDIT scores were grade, religion, maternal drinking status, social value about drinking, affectionate feelings of those around one and satisfaction of life. Only social value about drinking was statistically significant correlated factor with AUDIT scores in female. As a result of multiple regression analysis, the related factors with AUDIT scores were sex, maternal drinking status, satisfaction of life and social value a bout drinking. Conclusion : The experience rate of drinking in medical students was higher than that in other college students. Grade, family drinking history, negative psychological feelings, social value about drinking were risk factors to problem drinking.

Associations Between Socio-demographic Characteristics and Healthy Lifestyles in Korean Adults: The Result of the 2010 Community Health Survey

류소연,최성우,한미아,박종 대한예방의학회 2014 Journal of Preventive Medicine and Public Health Vol.47 No.2

Objectives: Several previous studies have found that healthy behaviors substantially reduce non-communicable disease incidence and mortality. The present study was performed to estimate the prevalence of four modifiable healthy behaviors and a healthy lifestyle among Korean adults according to socio-demographic and regional factors. Methods: We analyzed data from 199 400 Korean adults aged 19 years and older who participated in the 2010 Korean Community Health Survey. We defined a healthy lifestyle as a combination of four modifiable healthy behaviors: non-smoking, moderate alcohol consumption, regular walking, and a healthy weight. We calculated the prevalence rates and odds ratios of each healthy behavior and healthy lifestyle according to socio-demographic and regional characteristics. Results: The prevalence rates were as follows: non-smoking, 75.0% (53.7% in men, 96.6% in women); moderate alcohol consumption, 88.2% (79.7% in men, 96.9% in women); regular walking, 45.0% (46.2% in men, 43.8% in women); healthy weight, 77.4% (71.3% in men, 73.6% in women); and a healthy lifestyle, 25.5% (16.4% in men, 34.6% in women). The characteristics associated with a low prevalence of healthy lifestyle were male gender, younger age (19 to 44 years of age), low educational attainment, married, living in a rural area, living in the Chungcheong, Youngnam, or Gwangwon-Jeju region, and poorer self-rated health. Conclusions: Further research should be implemented to explore the explainable factors of disparities for socio-demographic and regional characteristics to engage in the healthy lifestyle among adults.