Chicago Health and Aging Study
Population-based study to identify risk factors for Alzheimer's disease, disability, and other age-associated health conditions.
Overview
- Acronym
- CHAP
- Investigators
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Dr. Carlos Mendes de Leon
University of Michigan
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Dr. Carlos Mendes de Leon
- Contacts
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Dr. Carlos Mendes de Leon
University of Michigan
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Dr. Carlos Mendes de Leon
General Design
- Study design
- Cohort
- Start - End Year
- 1993 - 2011
- General Information on Follow Up (profile, frequency)
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The CHAP study included in-person interviews that were conducted in the participants' homes in approximately three-year cycles, with each subsequent cycle starting immediately after completion of the previous one, for a total of 5 follow-up.
- Recruitment Target
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- Individuals
- Number of Participants
- 10,801
- Number of Participants with Biological Samples
- 8,000
Access
Availability of data and biosamples
| Possible Access to Data | |
| Possible Access to Biosamples | |
| Other |
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Marker Papers
Bienias JL, Beckett LA, Bennett DA, Wilson RS, Evans DA. Design of the Chicago Health and Aging Project (CHAP). 2003; 5(5): 349-55.
PUBMED 14646025Timeline
Population
The original CHAP study population was selected from three adjacent community areas (Morgan Park, Washington Heights and Beverly) on the south-west side of Chicago. In 1993, the study began with a complete census of the study area, and all residents aged 65 and older were invited to participate. As of the third interview cycle, CHAP began to enroll newly aged participants; that is, community residents that had turned 65 years since the beginning of the study. As of the fourth cycle, CHAP also began to enroll residents from a neighboring community area, Mount Greenwood, to achieve a more even racial balance in its study population.
Selection Criteria
- Minimum age
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65
- Countries
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- United States of America
- Territory
- Chicago
- Ethnic Origin
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- Whites and Blacks
Sample Size
- Number of Participants
- 10,801
- Number of Participants with Biological Samples
- 8,000
- Supplementary Information about Population
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The "original cohort", enrolled between 1993 and 1997, included 6,158 participants. In 2000, CHAP began to enroll additional participants from the study community who had turned 65 since inception of the study as “successive age cohorts.”
Data Collection Events
| # | Name | Description | Start | End |
|---|---|---|---|---|
| 0 | CHAP - Baseline | CHAP data collection consisted of in-person interviews conducted in the participants' ... | 1993 (January) | 1997 (May) |
| 1 | CHAP - Follow-up 1 | CHAP data collection consisted of in-person interviews conducted in the ... |
1997 (June) | 2000 (February) |
| 2 | CHAP - Follow-up 2 | CHAP data collection consisted of in-person interviews conducted in the ... |
2000 (March) | 2003 (January) |
| 3 | CHAP - Telephone interviews | As of the third cycle, CHAP started to add yearly interviews for all surviving ... |
2000 (March) | 2011 (December) |
| 4 | CHAP - Follow-up 3 | CHAP data collection consisted of in-person interviews conducted in the ... |
2003 (February) | 2006 (April) |
| 5 | CHAP - Follow-up 4 | CHAP data collection consisted of in-person interviews conducted in the ... |
2006 (May) | 2009 (January) |
| 6 | CHAP - Follow-up 5 | CHAP data collection consisted of in-person interviews conducted in the ... |
2009 (March) | 2011 (December) |
Participating Studies
| Acronym | Name | Study design | Countries |
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Harmonization Initiatives Included
| Acronym | Name |
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Networks
| Acronym | Name | Harmonization Initiatives | Individual Studies |
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Datasets
| Name | Type | Data Collection Events | Variables |
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