The Danish National Survey of Diet and Physical Activity 2021-2023

Study Overview
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Brief Summary
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The Danish National Survey of Diet and Physical Activity (DANSDA) 2021-23 is a nationally representative, cross-sectional survey of dietary and physical activity habits of 4-80 year-old Danes, and is carried out at the National Food Institute, Technical University of Denmark (DTU Food). DANSDA provides high quality, nationally representative data on diet, physical activity, smoking, alcohol and weight status in Denmark.

Detailed Description
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The principal objective of DANSDA is to monitor dietary intake and physical activity in a representative sample of the Danish population aged 4-80 years, and provide data for surveillance of the food and nutrient intake and physical activity of the general population. The survey is a nationally representative cross-sectional survey, which includes face-to-face interviews, anthropometric measurements, blood pressure measurement, blood sampling, 7-day web-based food diaries, and pedometer-determined physical activity which is recorded in 7-day web-based step diaries. In the interview socio-demographic details as well as lifestyle and health attitudes are recorded. Web-based food and step diaries are collected in the entire survey population of 4000 individuals, blood pressure is measured in 15-80 year-olds, and biological samples (blood) are collected in a subpopulation of approximately 1000 individuals aged 40-70 years. Biomarker of metabolic health are measured in a blood sample drawn after an overnight fast. The blood-based biomarkers (cholesterol, triglycerides, glucose), anthropometric data and blood pressure measurements are used to assess the prevalence of the metabolic syndrome (WHO definition) in 40-70 year-old Danes. Surplus blood samples are stored in a biobank for 30 years. The data from the survey provide the evidence base to support work by the authorities to facilitate the adoption of healthier eating and physical activity behavior and reduce lifestyle-related diseases. Another objective is to provide detailed data on food consumption at the individual level, which enables food chemical exposure assessment and forms an essential part of food safety risk assessment. Furthermore, the data will be used to assess the environmental impact of the diet.

Official Title
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The Danish National Survey of Diet and Physical Activity 2021-2023

Conditions
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Diet Habit, Nutritional and Metabolic Disease, Lifestyle

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Danish Citizen 4-80 years old Sufficient Danish language proficiency Exclusion Criteria: Care home resident

Ages Eligible for Study
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Minimum Age: 4 Years
Maximum Age: 80 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Dietary intake | Dietary intake is assessed by a 7-day web-based food diary. | Baseline | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Physical activity | Physical activity is assessed by pedometer recordings over 7 days, measured as daily steps | Baseline | 
| Intakes of rare food products | Supplementary food frequency questionnaire (FFQ) focusing on foods consumed occasionally | Baseline | 
| Blood pressure | Average of three blood pressure measurements (systolic and diastolic blood pressure) using a validated blood pressure monitor, measured in mmHg. Measured among 15-80-year-olds. | Baseline | 
| Waist circumference | Waist circumference, measured in cm | Baseline | 
| Body mass index | Weight and height will be combined to report BMI in kg/m^2 | Baseline | 
| Fasting glucose | Fasting glucose concentration in plasma, measured in mmol/l among 40-70-year-olds | Baseline | 
| Triglyceride | Plasma triglyceride concentration, measured in mmol/l among 40-70-year-olds | Baseline | 
| HDL cholesterol | Plasma HDL concentration, measured in mmol/l among 40-70-year-olds | Baseline | 
| Total cholesterol | Plasma total cholesterol concentration, measured in mmol/l among 40-70-year-olds | Baseline | 
| Metabolic syndrome score | Waist circumference, blood pressure, HDL cholesterol, triglycerides and fasting glucose will be combined to report metabolic syndrome score among 40-70-year-olds. | Baseline | 
| Socio-demographic background information through personal interview | Personal interview about socio-demographic background, lifestyle and health attitudes | Baseline | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Diet, Nutrition, Physical activity, Lifestyle, Metabolic syndrome, Anthropometrics, Blood pressure, Pedometer-determined steps, BMI, Waist circumference, Metabolic health biomarkers