Research with the NAKO

The information from over 205,000 participants in the NAKO is stored in a unique database. Our aim is to support your vision of new scientific questions to improve human health. To this end, we provide researchers with data and biosamples from participants.

On the following pages we inform you about NAKO data and biosamples and how the utilisation procedure for your research project works. The central tool for accessing the data is the NAKO TransferHub.

News for researchers

Study profile

The German National Cohort (NAKO) is a multidisciplinary, population-based cohort study that aims to investigate the development and aetiology of diseases, identify risk factors and improve the early detection and prevention of diseases.
Facts and figures
Start:
Since 2014, 30 year perspective
Type:
Population-based cohort study
Type of data collection:
Prospective
Design:
Longitudinal
Country:
Germany
Infrastructure:
18 study centres
Participants:
205,000 men and women aged 20—69 years at the start of the study. Drawn randomly from mandatory population registries.
Funded by:
German Federal Ministry of Research, Technology and Space (BMFTR) and the participating Federal States, Helmholtz Association
Study waves:
Baseline examination (U1)
06/2014—09/2019
205,000 participants

First re-examination (U2, 5-years-Follow-up)
05/2019—07/2024
135,000 participants

Second re-examination (U3, 10-years-Follow-up)
07/2024—2028
85,000 participants (planned)
Study register:
DRKS00037328

Study participation:

The baseline examination marks the initial in-depth health assessment of each participant. It includes a wide range of standardized tests, measurements, interviews, and questionnaires to gather comprehensive data on health, lifestyle, and environmental exposures.
The first re-examination is a follow-up visit conducted several years after the baseline examination. It repeats many of the original assessments to track changes in health status over time. Participants who are unable to attend in person are offered a replacement questionnaire to capture key health information remotely.
The second re-examination further continues the long-term health monitoring of participants. It builds upon the previous visits by updating measurements and health data. For participants who cannot attend the study center, a detailed replacement questionnaire is used to maintain their contribution to the study.
Between the main examination phases, participants are invited to complete periodic health surveys. These surveys are conducted via mail or online and focus on changes in lifestyle, new diagnoses, or other relevant health events, helping to keep the participant data up to date throughout the study period (GEFU questionaires).
  • Focuses on measurement reliability
  • Involves repeated assessments within the baseline

Research data data and biosamples from 205,000 participants

Physical examinations

Interview

Questionnaires

Magnetic resonance imaging (MRI)

Biosamples

Environmental Data Unit (EDU)

Genetic data

Publications on the study design

    • German National Cohort (NAKO) Consortium. The German National Cohort: aims, study design and organization. Eur J Epidemiol 29, 371–382 (2014). https://doi.org/10.1007/s10654-014-9890-7
    • Peters, A., German National Cohort (NAKO) Consortium., Peters, A. et al. Framework and baseline examination of the German National Cohort (NAKO). Eur J Epidemiol 37, 1107–1124 (2022). https://doi.org/10.1007/s10654-022-00890-5
    • Wichmann et al. The Biobank of the German National Cohort. Bundesgesundheitsblatt 59, 351-360 (2016) https://doi.org/10.1007/s00103-012-1499-y
    • Bamberg et al. Whole Body MR Imaging in the German National Cohort. Radiology 277, 206-220 (2015)
    • Rach, S., Sand, M., Reineke, A. et al. The baseline examinations of the German National Cohort (NAKO): recruitment protocol, response, and weighting. Eur J Epidemiol 40, 475–489 (2025). https://doi.org/10.1007/s10654-025-01219-8
    • Kuss, O., Becher, H., Wienke, A. et al. Statistical Analysis in the German National Cohort (NAKO) – Specific Aspects and General Recommendations. Eur J Epidemiol 37, 429–436 (2022). https://doi.org/10.1007/s10654-022-00880-7
    • Ahrens, W., Greiser, H., Linseisen, J. et al. Das Design der Machbarkeitsstudien für eine bundesweite Kohortenstudie in Deutschland. Bundesgesundheitsbl. 57, 1246–1254 (2014). https://doi.org/10.1007/s00103-014-2042-0

Further NAKO-Publications: www.nako.de/publications

Application Procedure

From the first application to the completed research project – here you can see all the steps to realise your research projects with NAKO data and biosamples!

Contact us

Scientific project management

Scientific project management is responsible for planning, conducting and monitoring the study to ensure that the objectives are achieved efficiently and within the timeframe.

Research data management

Central research data management is responsible for the systematic recording, storage and maintenance of all collected data in order to ensure high data quality and security. It also ensures that the data is accessible for analyses to enable scientific use.