• Title, Summary, Keyword: Korea National Health and Nutrition Survey

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Complex sample design effects and inference for Korea National Health and Nutrition Examination Survey data (국민건강영양조사 자료의 복합표본설계효과와 통계적 추론)

  • Chung, Chin-Eun
    • Journal of Nutrition and Health
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    • v.45 no.6
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    • pp.600-612
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    • 2012
  • Nutritional researchers world-wide are using large-scale sample survey methods to study nutritional health epidemiology and services utilization in general, non-clinical populations. This article provides a review of important statistical methods and software that apply to descriptive and multivariate analysis of data collected in sample surveys, such as national health and nutrition examination survey. A comparative data analysis of the Korea National Health and Nutrition Examination Survey (KNHANES) was used to illustrate analytical procedures and design effects for survey estimates of population statistics, model parameters, and test statistics. This article focused on the following points, method of approach to analyze of the sample survey data, right software tools available to perform these analyses, and correct survey analysis methods important to interpretation of survey data. It addresses the question of approaches to analysis of complex sample survey data. The latest developments in software tools for analysis of complex sample survey data are covered, and empirical examples are presented that illustrate the impact of survey sample design effects on the parameter estimates, test statistics, and significance probabilities (p values) for univariate and multivariate analyses.

Data resource profile: oral examination of the Korea National Health and Nutrition Examination Survey (국민건강영양조사 구강검사 개요)

  • Woo, Gyeong-Ji;Lee, Hye-Rin;Kim, Yoonjung;Kim, Hye-Jin;Park, Deok-Young;Kim, Jin-Bom;Oh, Kyung-Won;Choi, Youn-Hee
    • Journal of Korean Academy of Oral Health
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    • v.42 no.4
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    • pp.101-108
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    • 2018
  • Objectives: The Korea National Health and Nutrition Examination Survey (KNHANES) is a national surveillance system that has been assessing the health and nutritional status of Koreans since 1998. Based on the National Health Promotion Act, the surveys have been conducted by the Korea Centers for Disease Control and Prevention (KCDC). Methods: An oral examination as part of The National Health and Nutrition Examination was proposed to calculate the sample design and survey participation. The surveying system was presented by classifying the measurement environment, screening, and survey items by year, and the merits and limitations of using the data were suggested by examining the status of survey quality management and the process of disclosing raw data. Results: This nationally representative cross-sectional survey samples approximately 10,000 individuals each year and collects information on oral examinations and oral health interviews. Data for the oral health component of KNHANES was obtained to assess the oral health status of Koreans and determine the prevalence of dental caries and periodontitis. The oral health data quality control of KNHANES was composed of three parts: "Education Program" and "Field Training Program" for quality control of oral health examiners (dentists) by the professional academy, and "Data management" by the KCDC. After completion of the three-step data check, the indicators of dental caries, periodontal disease, and oral health behavior were published in the National Health Statistics. Conclusions: To achieve the goals of oral health indicators, we will continue to monitor so that we can use it as basic data for oral policies and carry out various linkage analyses related to oral diseases.

1999 Seasonal Nutrition Survey ( I ) - Food consumption survey - (1999 년도 계절별 영양조사 ( I ) - 식품섭취실태 -)

  • Kim, Bok-Hui;Gye, Seung-Hui;Lee, Haeng-Sin;Jang, Yeong-Ae;Sin, Ae-Ja
    • Journal of the Korean Dietetic Association
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    • v.7 no.3
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    • pp.282-294
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    • 2001
  • n accordance with the National Health Promotion Act of 1995, newly designed National Health and Nutrition Survey was carried out in winter of 1998. Although this survey amended most of the problems noted in previous Nutrition Surveys, it still had a limitation in reflecting seasonal variation in food intake due to the survey period which was confined to November and December. In order to counterbalance this limitation and estimate the yearly food intake of Korean population, three seasonal nutrition surveys were taken place in spring, summer, and fall of 1999. Seasonal Nutritional survey targeted 15 households each in 60 nationwide primary sampling units(PSUS) which were part of 200 PSUS of 1998 National Health and Nutrition Survey. Therefore, total of 2,700 households were surveyed in 3 seasons. The interviewers visited each household members and carried out face to face interview on household. Daily food intake was monitored using 24 hour recall method. According to the survey results, fruits, beverage and alcohol intake showed large variation with season while processed foods showed almost no variation. And intake of vegetables and fruits were influenced by their own harvesting time and had impact on the list of foods consumed most. With the result of the 1998 NHNS, this study made it possible to estimate the yearly average food intake of Korean population. The result of this survey is expected to be used in planning food supply and setting tolerance level of contaminants of each foods at the government level.

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Analysis of the Difference in Nutrients Intake, Dietary Behaviors and Food Intake Frequency of Single- and Non Single-Person Households: The Korea National Health and Nutrition Examination Survey (KNHANES), 2014-2016 (1인가구와 다인가구의 영양소섭취, 식행동 및 식품섭취빈도에 대한 차이분석 : 제 6, 7기 국민건강영양조사(2014~2016)자료 활용)

  • Kang, Na-Yeon;Jung, Bok-Mi
    • Korean Journal of Community Nutrition
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    • v.24 no.1
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    • pp.1-17
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    • 2019
  • Objectives: This study was performed to compare the dietary life of single- and non single-person households in the Korea National Health and Nutrition Examination Survey (KNHANES). Methods: A nationally representative sample of 20,421 19-64-year-olds who had 24-hour recall data was taken from the 2014-2016 Korea National Health and Nutrition Examination Survey (KNHANES). Single- and non single-persons were compared for nutrient intake, dietary behaviors, food consumption patterns, nutrition education and confirm nutrition label. Results: The dietary intakes of dietary fiber and iron were lower in single-person households than in non single-person households. The lower the level of education and income, the lower the nutrient intake of single-person households. In the case of those aged 19 to 29, the breakfast skipping rate was higher in single-person households than in non single-person households. The higher the education level, the higher the breakfast skipping rate and the eating out frequency in the single-person households. In the food intake survey, the frequency of healthy food intake in single-person households was much lower than that of non single-person households. The confirmation rate of nutrition labeling was lower in single-person households than in non single-person households. Conclusions: This study shows that single-person households have poorer health-nutritional behaviors than multi-person households. Therefore, a nutrition education program based on the data of this study needs to be developed for health promotion of single-person households.

1999 Seasonal Nutrition Survey ( II ) - Nutrient intake status - (1999 년도 계절별 영양조사 ( II ) - 영양소섭취실태 -)

  • Kim, Bok-Hui;Gye, Seung-Hui;Lee, Haeng-Sin;Jang, Yeong-Ae;Sin, Ae-Ja
    • Journal of the Korean Dietetic Association
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    • v.7 no.4
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    • pp.426-438
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    • 2001
  • Nutrient intake of Koreans from the 1999 Seasonal Nutrition Survey was somewhat lower than those of 1995 National Nutrition Survey or 1998 National Health and Nutrition Survey owing to the seasonal variation in amount and kind of foods eaten. In addition to the seasonal variation, low response rate of households which were surveyed twice was another reason for lower intake. Analysis of the major source of nutrients showed that intake of energy, carbohydrate, vitamin A and vitamin C was influenced by seasonal food supply pattern. And especially, vitamin A and vitamin C intake was more influenced by consumption of fruits and vegetables than other food groups. Main sources of these two nutrients were spinach and strawberry in spring, watermelon, tomato, melon and potato in summer, and grapes and pumpkin in autumn. As shown before in the report on food consumption, intake of beverages, drinks, fruits and vegetables was more influenced by season than others and these food groups affected the nutrient intake most. With the results of the 1998 National Health and Nutrition Survey, this study made it possible to estimate the average nutrient intake of the Korean population through out a year.

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Development of Strategies to Improve the National Nutrition Survey System (국가 영양조사에서 가구 방문 조사 체계의 개선 방안)

  • yang, Narae;Lee, Seungmin;Lim, Youngsuk;Park, Haeryun;Kim, Kirang
    • Korean Journal of Community Nutrition
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    • v.23 no.5
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    • pp.444-455
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    • 2018
  • Objectives: The current survey environment is changing and participation rates in national nutrition surveys are decreasing. Therefore, the purpose of this study was to develop strategies for improving the nutrition survey system in the Korea National Health and Nutrition Examination Survey (KNHANES). Methods: To develop an alternative system for conducting the KNHANES nutritional survey, we conducted focus group interviews with stakeholders of the survey, SWOT (Strengths, Weaknesses, Opportunities, and Threats) analysis, and expert reviews. In addition, spatial analysis of potential sites for conducting surveys instead of relying on household visits was performed, and the perception of nutritional surveys in the population eligible for KNHANES was evaluated. Results: Based on the results of the focus group interviews, SWOT analysis, and expert reviews, we propose two options for survey sites: vehicles specifically prepared for nutritional surveys and public facilities such as community service centers or public health centers. Among public facilities, community service centers were found to be more appropriate sites than public health centers because they were considered more accessible. About 90% of respondents would participate in the survey in public facilities and about 74% would in vehicles. Conclusions: Conducting national nutrition surveys in specially designed vehicles and public facilities could be a viable alternative to home visits. Next, the validity of these newly proposed nutrition survey methods needs to be compared to the results of the current national nutrition survey.

Korea National Oral Health Survey Systems and recent oral health status in children (한국 공공의료 구강건강조사 체계 및 아동의 구강건강 현황)

  • Choi, Youn-Hee
    • The journal of the Korean dental association
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    • v.58 no.1
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    • pp.28-37
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    • 2019
  • This study aimed to introduce what Korea national oral health surveys are and examine recent oral health status in Korean children. Korea Government has implemented national oral health-related surveys during the past two decades. The surveys with oral health examination are Korean Children's National Oral Health Survey (KCNOHS) since 2000 in 5-year-old and 12-year-old children and Korea National Hhealth and Nutrition Examination Survey (KNHANES) since 2007 aged 1 year and more. KCNOHS provides the information about the distribution of prevalence of dental caries, gingival health, behavioral factors, and dental clinic demands etc. KNHANES has huge amount of health data for representative Korean population including oral health and general conditions. Based on KCNOHS, the prevalence of dental caries and its experience has decreased steadily, and the status of oral hygiene and preventive treatment called sealents has been also improved after the year of 2000. However, there is still a gap to reach to those of Western developed countries. Therefore, more effective oral health policy plans and strategies for Korean children and adolescents are needed to prevent and manage for dental caries in private and clinical field of dentistry with public sector.

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Relationship between depression and number of present teeth in Korean elderly: Data from the Sixth Korea National Health and Nutrition Examination Survey (한국 노인의 우울과 현존 치아수의 관련성 : 제 6기 국민건강영양조사 자료 이용)

  • Choi, Hye-Sook
    • Journal of Korean society of Dental Hygiene
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    • v.19 no.5
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    • pp.689-698
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    • 2019
  • Objectives: The study aimed to investigate the relationship between depression and number of present teeth in Korean elderly individuals. Methods: Data for this cross-sectional survey was obtained from the records of the sixth Korea National Health and Nutrition Examination Survey (KNHANES). The subjects were 1,199 Korean elderly individuals above 65 years of age. The survey and examination data were used for the independent variables. The KNHANES included health status, nutrition survey, and oral examination. $x^2-test$ was performed to identify the characteristics of depression and number of teeth present according to the characteristics of the study subjects. Logistic regression analysis was also performed to identify the relationship between depression and number of teeth present. The statistical significance level wa sset at 0.05. Results: The prevalence of depression in the subjects was 14.8%. There were statistically significant differences in the prevalence of depression, depending on gender (p<0.001), education level (p=0.001), income (p=0.001), spouse status (p<0.001), and alcohol consumption (p=0.020). The association between depression and the number of teeth present showed statistically significant difference after adjustment (p=0.040). Conclusions: Depression in elderly individuals was closely related to the number of teeth present. Therefore, public health policies for improving oral health should be established to prevent depression.

Dietary Intake Pattern of the Korean Adult Population by Weight Status - 2001 National Health and Nutrition Survey - (우리나라 성인의 체중상태에 따른 식생활 특성 - 2001 국민건강.영양조사 결과에 근거하여 -)

  • Lee Yoon-Na;Lee Haeng-Shin;Jang Young-Ai;Lee Hae-Jeung;Kim Bok-Hee;Kim Cho-Il
    • Korean Journal of Community Nutrition
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    • v.11 no.3
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    • pp.317-326
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    • 2006
  • To explore the relationship between weight status and food intake pattern, the Nutrition Survey results of the 2001 National Health and Nutrition Survey were analyzed. Dietary intake data of Korean adults aged 20 to 64. years who participated in the 2001 National Health and Nutrition Survey, was used along with their demographic data. Subjects were classified into 4 groups based on the BMI value of subjects: underweight, normal, overweight and obese. For male adults, obese subjects had significantly higher mean intake of energy, protein, carbohydrates, and fat than normal subjects. In addition, obese male adults consumed more animal foods, especially more meats, than normal subjects. However, females obese subjects did not show higher intake of energy or fat. Although obese male adults showed higher energy intake, calcium and iron intake per 1000 kcal was lower than normal adults. Average calcium intake in females was low; about 70% of RDA regardless of obesity level. In addition, riboflavin and Vitamin A intake was lower in overweight and obese female than in normal females. Percentage of subjects with low fruit and vegetable intake (< 400 g per day) was also high in female subjects. These results showed that food and nutrient intake patterns of obese population were different between male and female adults. These dietary intake patterns need to be considered in developing and implementing nutrition policy and intervention programs to prevent and control obesity. Moreover, the National Survey and monitoring system should be developed for continuous and effective investigation on the relationship between obesity and dietary intake.

Prevalence and Associated Factors of Depression in General Population of Korea: Results from the Korea National Health and Nutrition Examination Survey, 2014

  • Shin, Cheolmin;Kim, Yoonjung;Park, Suyeon;Yoon, Seoyoung;Ko, Young-Hoon;Kim, Yong-Ku;Kim, Seung-Hyun;Jeon, Sang Won;Han, Changsu
    • Journal of Korean Medical Science
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    • v.32 no.11
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    • pp.1861-1869
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    • 2017
  • Depressive disorder is a common mental illness and remains a major cause of morbidity worldwide. The present study, a cross-sectional, nationwide, population-based survey assessed the prevalence of depression in the general population of Korea through a random sampling of the non-institutionalized population for the Korea National Health and Nutrition Examination Survey (KNHANES) VI. The Patient Health Questionnaire (PHQ)-9 was first introduced into the KNHANES to detect depression. The point prevalence of depression (PHQ score of 10 or higher) was 6.7% (95% confidence interval [CI], 5.7-7.6) in 4,949 subjects. Based on the analysis using the diagnostic algorithm of the PHQ-9, the prevalence of major depressive disorder was 2.7% (95% CI, 2.2-3.3). Multiple logistic regression analysis, after adjusting the sociodemographic variables, also showed that the factors associated with depression were perceived stress and health status. This study reported for the first time that the point prevalence of depression screened using the PHQ-9 in this nationwide survey of the Korean population was similar to that of the western countries. As the KNHANES to detect depression is conducted biennially, further studies on the accumulated data are expected in the future.