The DNBC is one of the world's largest birth cohorts with more than 180.000 participants.
The researchers have collected data throughout the children's lives. Learn more about the specific data collections in the menu.
Data are made available as the collections are completed. Next up is our ongoing 18-year-old follow-up which will be available in 2022.
In 2023 the young adults of the DNBC are between 20-26 years old and new data collections are in the pipeline.
Data available
Since the completion of the initial 4 computer-assisted telephone interviews the DNCB has expanded the data collection with several data sweeps throughout offspring childhood and youth and also among mothers.
In this section you will find information about DNBC questionnaires and data available.
Data available
You may ask for data from:
Food Frequency Questionnaire (FFQ)
Dietary Habits of 14-year olds
Enrollments and response rates
| Data sweep | Invited | Responders | Response rate | Codebook |
| Enrolments | 101,042 | |||
| Interview 1 | 92,892 | 92% | Yes, DK and English | |
| Interview 2 | 87,802 | 87% | Yes, DK and English | |
| FFQ | 72,821 | 72% | pdf of questionnaire | |
| Interview 3 | 70,292 | 69% | Yes, DK and English | |
| Interview 4 | 66,764 | 65% | Yes, DK and English | |
| 7-year follow-up | 91,256 | 57,282 | 63% | Yes, DK and English |
| 11-year follow-up | 90,986 | 49,963 | 55% | Yes, DK and English |
| Maternal Follow-up | 78,010 | 43,641 | 55% | Yes, DK and English |
| 14-year follow-up | 78,651 | 36,599 | 47% | English only |
| Puberty follow-up | 22,439 | 15,819 | 70% | Yes, DK and English |
| 18-year follow-up | 89,377 | 49,963 | 56% | Yes, DK and English |