Research group for nutrition, sustainability and health promotion, National Food Institute, Technical University of Denmark, Denmark.
Scand J Public Health. 2024 Aug;52(6):752-760. doi: 10.1177/14034948231190681. Epub 2023 Aug 1.
This study describes the study design, study participants, participation rate and underreporting in the Danish National Surveys of Diet and Physical Activity (DANSDA) from 1995 to 2011-2013.
DANSDA are government-funded surveys of food and nutrient intake, physical activity and lifestyle, undertaken to support nutritional policy, risk assessment and public health research. The surveys are cross-sectional based on primarily simple random samples (ages 1-80 years in 1995, 4-75 years in 2000-2013) drawn from the Danish Civil Registration System. Approximately 4800 individuals in 1995, 8200 in 2000-2002, 8400 in 2003-2008 and 7300 in 2011-2013 were invited to participate. Participants completed a seven-day food diary, a physical activity questionnaire (2000-2008), a step diary (2011-2013) and a face-to-face interview. Self-reported anthropometrics (1995-2013) were supplemented with device-based measures (2011-2013). Pedometers were included in 2011-2013.
The number of participants included per survey round was 3100-4400. Participant rates decreased from 66% (1995) to 54% (2011-2013). Non-participation was primarily refusal. Ages 18-30 years, 61-75 years (2000-2013), 61-80 years (1995) and low educated and individuals living alone were underrepresented. Underreporting of energy intake among adults ranged from 14% (1995) to 26% (2008).
The methods in DANSDA have been developed to include device-based measures on physical activity and anthropometrics. This has improved the applicability of the results of the survey. The participation rate has fallen, which has affected sample representativity, and underreporting has increased. Future DANSDA surveys should explore and consider new initiatives to counteract non-response and underreporting, with the aim of enhancing data representativeness and applicability.
本研究描述了 1995 年至 2011-2013 年期间丹麦全国饮食和体力活动调查（DANSDA）的研究设计、研究参与者、参与率和漏报情况。
DANSDA 是一项政府资助的关于食物和营养素摄入、体力活动和生活方式的调查，旨在支持营养政策、风险评估和公共卫生研究。这些调查是基于丹麦民事登记系统中主要采用简单随机抽样（1995 年为 1-80 岁，2000-2013 年为 4-75 岁）的横断面研究。1995 年约有 4800 人、2000-2002 年约有 8200 人、2003-2008 年约有 8400 人、2011-2013 年约有 7300 人受邀参加。参与者完成了一份为期七天的食物日记、一份体力活动问卷（2000-2008 年）、一份计步器日记（2011-2013 年）和一次面对面访谈。自我报告的人体测量数据（1995-2013 年）补充了基于设备的测量数据（2011-2013 年）。计步器于 2011-2013 年纳入调查。
每轮调查纳入的参与者人数为 3100-4400 人。参与者比例从 1995 年的 66%下降到 2011-2013 年的 54%。不参与主要是拒绝。18-30 岁、61-75 岁（2000-2013 年）、61-80 岁（1995 年）和受教育程度低以及独居的人群代表性不足。成年人的能量摄入漏报率在 14%（1995 年）至 26%（2008 年）之间。
DANSDA 中的方法已被开发用于对体力活动和人体测量数据进行基于设备的测量。这提高了调查结果的适用性。参与率下降，影响了样本代表性，漏报率增加。未来的 DANSDA 调查应探索和考虑新举措，以应对无应答和漏报问题，目的是增强数据代表性和适用性。
