Growing up In Ireland Cohort ’98 (Child Cohort) Wave 3 - 17/18 years, 2016

Study number (SN): 0020-03


Central Statistics Office (CSO). (2018). Growing up In Ireland Cohort ’98 (Child Cohort) Wave 3 - 17/18 years, 2016. [dataset]. Version 1. Irish Social Science Data Archive. SN: 0020-03. URL



Growing Up in Ireland - the National Longitudinal Study of Children, is the first survey of its kind ever undertaken in Ireland and, as such, aims to explore the many and varied factors that contribute to or undermine the wellbeing of children currently living there. A two age cohort longitudinal design was adopted with one cohort of 11,134 infants (aged nine months) and the other of 8,568 nine-year olds, with a view to improving and understanding of children’s development across a range of domains. Since the survey is longitudinal in nature respondents in both cohorts are interviewed on a number of occasions over the following few years. The 8,568 children representing the nine-year cohort were born between 1st November 1997 and 31st October 1998.

The nine year cohort and their parents/guardians were interviewed for a second time at thirteen years of age. Data collection for the second wave at 13 years took place between August 2011 and March 2012 and resulted in a completed datafile of 7,525 cases. Data collection for the third wave at 17/18 years took place between April 2015 and August 2016 and resulted in a completed datafile of 6,216 cases. 

Data Linkage – Central Applications Office (CAO) data

Respondents to Wave 3 were asked for their permission to link to the Central Applications Office (CAO) data on all applications to higher education courses. If the Young Person had already made an application for a higher education course through the CAO, their CAO number was recorded. Those who had not made an application at the time of interview but who were planning to apply in the future were asked for consent to be contacted by the Study Team in April 2017 to record their CAO number at that point.

Of the 6,216 respondents in Wave 3, 3,203 (52%) gave permission to access their CAO records and successful linkage was achieved for 3,061 cases (49%). Information on the course codes of up to 10 Level 6/7 courses and up to 10 Level 8 courses chosen by the Young Person; up to 3 course offers received and the course accepted was released from the CAO for those that had consented to the data linkage.

To make the data more user-friendly, the Study Team extracted the Higher Education Institute (HEI), the subject area, and the points level (Low / Medium / High / Restricted course), for every choice, offer and acceptance. The rankings of the course offers and the accepted course (first / second / third choice etc.) are also provided, as well as variables indicating the number of level 6/7 courses and the number of level 8 courses chosen.

For confidentiality reasons, the AMF only includes information on the total number of choices and offers, the level and ranking of offers and accepted courses.


  • Families
  • Children
  • Child Health
  • Child Development
  • Education
  • Child Day Care
  • Leisure Time Activities
  • Hobbies
  • Parental Role
  • Anthropometric Measurements



The children of the Child Cohort were born between 1st November 1997 and 31st October 1998 and were aged 9 years at the time of the first data collection between August 2007 and May 2008. 8,568 families participated in the first wave while 7,525 took part in the second wave. 6,216 families took part in the third wave.

Observation units

  • Families / Households

Temporal coverage

From 04/2015 to 08/2016

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 two-stage design was adopted. In the first instance a random sample of Primary Schools was recruited and at the second stage a sample of nine-year old children was selected from the sample of schools. The design required that the sample be regionally representative with no spatial bias. In addition, no oversampling or booster sampling of subgroups was required. There was a total of 56,497 nine-year-olds registered in the Census of Population in 2006 so a sample size of 8,568 represented approximately 14 percent or about 1 in every 7 of the nine-year-olds resident in the country. Approximately 81 percent of those who took part at Wave 2 took part in Wave 3.

Response rate

6,216 cases



Data (available through ISSDA application process)

File name

File format/s

Contents of file

GUI Data_ChildCohortWave3 SAS, SPSS, Stata Survey data using questionnaire-based variable naming
0020-03_GUI_ChildCohort_Wave3_ TUDFFQ SAS, SPSS, Stata Time Use and Food Frequency Data


Documentation (available for download)

File name


File format/s

Contents of file



Cohort ’98 at 17/18 Years Codebook for Wave 3 of the Child Cohort

Summary data dictionary Child - Wave 3 - AMF


Summary Data Dictionary for Wave  of the Child Cohort (at 17/18 years)

Questionnaires - Child - Wave 3


Questionnaires for Wave 3 of the Child Cohort (at 17/18 years)

Summary guide to the datasets - Child- Wave 3


A Summary Guide to Wave 3 of the Child Cohort (at 17/18 years)

Derived variables for the Child Cohort


Derived variables in the 9-Year Cohort.

0020-03_GUI_ChildCohort_Wave3_ TUDFFQ


Guide to Time Use and Food Frequency Data_GUI Wave 3 Child Cohort




Accessing the data

To access the data, please complete a , sign it, and send it to ISSDA by email.ISSDA Data Request Form for Research Purposes

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, Equality, Disability, Integration and Youth


Any work based in whole or part on resources provided by ISSDA, should  acknowledge: "Growing up In Ireland Cohort ’98 (Child Cohort) Wave 3 - 17/18 years, 2016" 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). (2014). Growing up In Ireland Cohort ’98 (Child Cohort) Wave 3 - 17/18 years, 2016. [dataset]. Version 1. Irish Social Science Data Archive. SN: 0020-03. URL


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