CRELES Pre-1945 Cohort: Study Overview
CRELES is a longitudinal survey of people aged 60 in the first cohort, and aged 55-65 in the second cohort, living in private households in Costa Rica. Its main goal is to examine determinants of longevity and explore how health and socioeconomic status interact to influence the quality of life of older adults. The survey elicits information about demographics, cognition, family structure, health, healthcare use, job status and history, income, and housing.
The CRELES sample is a nationally representative sample of the population aged 60 years and older, living in private households in Costa Rica. The initial sample was recruited between 2004 and 2006 using a multistage probability sampling of individuals aged 55 and older at the 2000 population census.
|Age Eligibility||Age 60 and older|
|People Interviewed per Household||One person per household|
|Institutional Representation||Respondents followed into institutions|
|Oversampling||Individuals aged 95 and older|
The CRELES core interview was carried out in 2005, 2007, and 2009 through face-to-face interviews, using computer-assisted personal interviewing (CAPI).
In addition to the core interview, CRELES also collects a number of other types of data.
|End of Life Interview||Conducted at Waves 2 and 3 with family members knowledgeable about decreased respondents.|
|Health Assessment||Conducted at each wave for all respondents.|
|Blood-Based Biomarkers||Fasting (14-hour) venous blood was drawn at Waves 1 and 2 among all respondents via qualified phlebotomist.|
|Urinary Biomarkers||Urine (12-hour overnight sample) was collected at Wave 1 among all respondents.|
|Food-Frequency Questionnaire||Conducted at each wave for all respondents.|
|Genetic Data||Leukocyte Telomere Length (LTL) measurement was performed in 2010 and 2014 for 1,173 CRELES participants using quantitative polymerase chain reaction (Q-PCR). DNA methylation was performed among a sub-sample of respondents using the Infinium HumanMethylation450 array.|
|Community Characteristics||Collected at Wave 1 among all respondents.|
The CRELES Wave 1 sample included 3,024 eligible individuals. The CRELES sample was not refreshed.
Public access CRELES data can be downloaded from the University of Caifornia, Berkeley. Data are anonymized and available by request from UC Berkeley.
The Gateway to Global Aging Data has created a user-friendly dataset based on CRELES data designed to allow researchers to conduct cross-wave and cross-study analysis.
|Harmonized CRELES||A dataset of research-ready variables derived from the core interviews.||Download via Gateway|
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