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CRELES 1945-1955 Cohort: Study Overview
CRELES is a longitudinal survey of people aged 60 and older 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 between the ages of 55 and 65, living in private households in Costa Rica. The initial sample was recruited in 2010/11 using a multistage probability sampling of individuals between the ages of 45 and 55 at the 2000 population census.
|Age Eligibility||Age 55 to 65|
|People Interviewed per Household||One person per household|
|Spouse Inclusion||Spouse of any age|
The CRELES core interview was carried out in 2010/11 and 2012/13 through face-to-face interviews, using computer-assisted personal interviewing (CAPI).
In addition to the core interview, CRELES 1945-1955 Cohort also collects a number of other types of data.
|End of Life Interview||Conducted at Wave 5 with someone knowledgeable about decreased respondents.|
|Health Assessment||Conducted at each wave for all respondents.|
|Blood-Based Biomarkers||Venous blood was drawn at Wave 4 among all respondents via qualified phlebotomist.|
|Genetic Data||Leukocyte Telomere Length (LTL) measurement was performed in 2014 for 2,369 CRELES participants using quantitative polymerase chain reaction (Q-PCR).|
|Community Characteristics||Collected at Wave 4 among all respondents.|
The CRELES Wave 4 sample included 4,254 eligible individuals. The CRELES sample was not refreshed.
CRELES has included linkages to administrative data since Wave 4. Costa Rican citizen respondents were linked to official records of birth, mortality, and voting history via national ID card.
|Birth||Supreme Electoral Tribunal|
|Mortality||Supreme Electoral Tribunal|
|Voting History||Supreme Electoral Tribunal|
Public access CRELES data can be downloaded from the University of Caifornia, Berkeley. Data are anonymized and available by request from UC Berkeley.
End of life interview
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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