National Health and Nutrition Survey

Project Purpose

To understand the national health and nutritional status in accordance with the National Health Promotion Act (Article 16)
- Investigation of health behaviors such as smoking, drinking, and physical activity, the prevalence of major chronic diseases such as obesity, hypertension, and diabetes, and the level of nutritional intake
To calculate indicators for monitoring the effectiveness of health promotion and chronic disease prevention and management policies
- To calculate target indicators for chronic diseases and healthy lifestyle practices for the National Health Promotion Plan, and to provide internationally comparable health indicators required by international organizations such as the WHO

(’98) Introduction of the Korea National Health and Nutrition Examination Survey
※ The 1st to 3rd KNHANES (1998, 2001, 2005) were short-term surveys conducted every 3 years.
(’07) Improvement of a system of year-round annual surveys, statistics production, and operation by a team of professional surveyors
(’08) Introduction of mobile examination vehicles and implementation of joint surveys in cooperation with professional academic societies
(’20) Transfer of survey implementation tasks to Regional Centers for Disease Control and Prevention (5 centers) following the establishment of the Korea Disease Control and Prevention Agency (September)
(’23) Revision of the "National Health Promotion Act" and its subordinate statutes, and introduction of an online survey (self-administered health questionnaire)
(’25)Introduction of a follow-up survey based on the Korea National Health and Nutrition Examination Survey

(Target) Annually, approximately 10,000 household members aged 1 and older from 4,800 households in 192 survey districts
(Method) Interviews and health examinations by a team of professional surveyors, conducted year-round
(Items) Approximately 400 items including chronic diseases, health behaviors (smoking, drinking, etc.), and nutritional intake

Category, Survey Area, Remarks Table
Category	Survey Area	Remarks
Health Examination	Obesity, hypertension, diabetes, dyslipidemia, liver disease, kidney disease, anemia, sarcopenia, lung disease, osteoporosis, etc.	Survey conducted inside a mobile examination vehicle
Health Interview	Smoking, drinking, physical activity, obesity and weight control, mental health, morbidity, healthcare utilization, activity limitations and quality of life, injury and safety awareness, education and economic activity, etc.
Nutrition	Dietary habits such as breakfast frequency and frequency of eating out, dietary supplements, use of nutrition labels, frequency of intake of major food groups, breastfeeding and weaning status, etc., food security, and food and nutrient intake

Based on the 1st year of the 10th KNHANES (2025)

(Background) Implementation of a follow-up survey to identify the causes of chronic disease onset and progression by periodically collecting information on changes in health behaviors, health status, etc.
(Target) KNHANES participants aged 10–59 who have consented to participate in the follow-up survey
(Survey Cycle) A baseline survey is conducted in the year of consent (1 time), followed by annual follow-up surveys (twice a year for 10+ years).

(Survey Content) Health behaviors by age (smoking, drinking, physical activity, etc.), nutritional intake, history of disease, etc.

Baseline Survey Items Baseline Survey
- Children: 40 questions
- Adolescents: 221 questions
- Adults: 225 questions
Follow-up Survey Items Children (ages 10–11)
Total 102 questions (Core 28, Rotating 74)
- Household survey (3)
- Morbidity (40)
- Sleep health (2)
- Smoking (2)
- Physical activity (2)
- Women's health (2)
- Mental health (50)
- Precocious puberty (1)
Adolescents (ages 12–18)
Total 317 questions (Core 52, Rotating 265)
- Household survey (4)
- Education (1)
- Economic activity (6)
- Morbidity (40)
- Obesity and weight control (2)
- Drinking (7)
- Sleep health (2)
- Smoking (11)
- Physical activity (2)
- Women's health (16)
- Mental health (56)
- Social support (1)
- Precocious puberty (1)
- Nutrition: Food frequency (168)
Adults (ages 19+)
Total 386 questions (Core 62, Rotating 324)
- Household survey (12)
- Education/Economic activity (12)
- Morbidity (74)
- Activity limitation/Quality of life (5)
- Obesity and weight control (2)
- Drinking (12)
- Sleep health (2)
- Smoking (23)
- Physical activity (19)
- Women's health (28)
- Mental health (22)
- Social support (3)
- Socioeconomic position (2)
- Nutrition, Food frequency (170)