Individual Study / ELFE

French Longitudinal Study of Children

French Longitudinal Study of Children

ELFE logo
Initiatives -
Start Year
End Year
National Research Agency Investment for the Future programme (ANR-11-EQPX-0038); French National Institute for Research in Public Health (IRESP TGIR 2009–01 programme); Ministry of Higher Education and Research; Ministry of Environment; Ministry of Health; French Agency for Public Health; Ministry of Culture; and National Family Allowance Fund.
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Investigators Contacts
  • Dr. Marie-Aline Charles
    French Institute for Medical Research and Health (Inserm)


Study design
Population cohort
Follow Up
Follow-up was intensive in the infancy and pre-school periods (from 2011 to 2015), including telephone interviews of both parents at age 2 months and 1 and 2 years, and one parent (the mother or, if not available, the father) at age 3.5 years. In addition, information on infant feeding was collected every month from age 2 to 10 months via the internet or paper questionnaires. Parents were also given a questionnaire to be completed by the child’s physician at age 2 years. A home visit was organized at age 3.5 years. The results of the medical examination performed at nursery school at age 3 to 4 years were collected (for ELFE children and control children born on the same day). A nursery school-teacher survey was performed when the children were 4 to 5 years old.

Marker Paper

Charles MA, Thierry X, Lanoe JL, Bois C, Dufourg MN, Popa R, Cheminat M, Zaros C, Geay B. Cohort Profile: The French national cohort of children (ELFE): birth to 5 years. Int J Epidemiol. 2020 Apr 1;49(2):368-369j. doi: 10.1093/ije/dyz227.

PUBMED 31747017


Sources of Recruitment
  • Individuals
  • Families

Number of participants

Number of participants
Number of participants with biosamples
Supplementary Information
18040 mothers + 18329 babies


Availability of data and biosamples


Availability of access information

On the study website :