Growing up in Ireland Cohort '08 (Infant Cohort) Wave 5 at 9 years, 2017/2018

Study number (SN): 0019-05


Central Statistics Office (CSO). (2019). Growing up in Ireland Cohort '08 (Infant Cohort) Wave 5 at 9 years, 2017/2018. [dataset]. Version 1. Irish Social Science Data Archive. SN: 0019-0. URL


Growing Up in Ireland, the National Longitudinal Study of Children is a landmark study of children and youth which has been running since 2006. In summary the project seeks to further our understanding of what it means to be a child or young person growing up in modern Ireland, with a view to informing policy on what both helps and hinders development. A two cohort, cross-sequential longitudinal design was adopted and began with one cohort (the Infant Cohort) of 11,134 infants (aged 9 months) and a second cohort (the Child Cohort) of 8,568 9-year-olds. Being longitudinal in nature, the same children are followed over time. The families of the Infant Cohort have been interviewed when the children were 9 months, 3 years and subsequently 5 years of age, while the Child Cohort and their parents/guardians were interviewed at 9, 13 and 17/18 years of age.

This wave of data concerns the Wave 5 interviews of the Infant Cohort at 9 years of age.


  • Sleep

  • Health

  • Child Development

  • Diet and Exercise

  • Leisure Time Activities

  • Play

  • Internet Use by Children

  • Television Viewing

  • Emotional Development

  • Well-being (Health)

  • Education

  • Peer-group Relationships

  • Bullying




The children of the Infant Cohort were born between 1st December 2007 and the 30th June 2008 and were aged 9 months at the time of the first data collection between September 2008 and April 2009. Over 10,000 families participated in the first wave (n=11,134) while 9,793 took part at age 3 years (Dec 2010 - July 2011), and 9,001 at age 5 years (Mar – Sep 2013). The current fifth wave of data collection, took place in the between June 2017 and February 2018, when the cohort was 9 years of age and was completed by 8,032 families.

Observation units

Families / Households

Temporal coverage

From 06/2017 to 02/2018

Time dimension

Cohort study

Geographical coverage

Country: Ireland

Methods of data collection

  • CAPI (Computer Aided Personal Interviewing)
  • CASI (Computer Assisted Self Interviewing)

Sampling procedures

A total of 10,052 children and their families were targeted in Wave 5, when the children were 9 years of age. This was made up of the families who had participated in the face-to-face interview in Wave 3 (when the Study Child was 5 years of age), as well as a small proportion of those who had not participated in Wave 3 but who had participated at one of the earlier rounds of the study.

Response rate

There are 8,032 observations in the Wave 5 data.

For more details on response rates see 0019-05_GUI_InfantCohort_Wave5_summary_guide



Data (available through ISSDA application process)

File name


File format/s

Contents of file SAS Survey data
0019-05_GUI_InfantCohort_Wave5.sas7bdat SAS Survey data



Survey data



Survey data 


Documentation (available for download)

File name


File format/s

Contents of file



Cohort ’08 at 9 Years Codebook for Wave 5 of the Infant Cohort



 Questionnaires for GUI Infant Wave 5

0019-05_GUI_InfantCohort_Wave5_summary_data_dictionary  PDF  Summary Data Dictionary – Infants Wave 5 
0019-05_GUI_InfantCohort_Wave5_summary_guide PDF  Summary Guide to Wave 5 of the Infant Cohort 




Accessing the data

To access the data, please complete a request form for research purposes, sign it, and send it to ISSDA by email.

For teaching purposes, please complete the ISSDA Data Request Form for Teaching Purposes, and follow the procedures, as above. Teaching requests are approved on a once-off module/workshop basis. Subsequent occurrences of the module/workshop require a new teaching request form.

Data will be disseminated on receipt of a fully completed, signed form. Incomplete or unsigned forms will be returned to the data requester for completion.


The Department of Children and Youth Affairs


Any work based in whole or part on resources provided by the ISSDA, should  acknowledge: “Growing up in Ireland Cohort '08 (Infant Cohort) Wave 5 at 9 years, 2018" and also ISSDA, in the following way: “Accessed via the Irish Social Science Data Archive -”.

Citation requirement

The data and its creators shall be cited in all publications and presentations for which the data have been used. The bibliographic citation may be in the form suggested by the archive or in the form required by the publication.

Bibliographical citation

Central Statistics Office (CSO). (2019). Growing up in Ireland Cohort '08 (Infant Cohort) Wave 5 at 9 years, 2017/2018. [dataset]. Version 1. Irish Social Science Data Archive. SN: 0019-0. URL


The user shall notify the Irish Social Science Data Archive of all publications where she or he has used the data.