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 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. |
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| 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.
