Overview
| Acronym |
CHAP |
|---|---|
| Investigators | |
| Contacts | |
| Start Year | 1993 |
| End Year | 2011 |
General Design
| Study Design | Cohort |
|---|---|
| General Information on Follow Up (profile, frequency) |
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 |
|
| Number of Participants |
10,801 |
| Number of Participants with Biological Samples |
8,000 |
Access
| Possible Access to Data |
|
| Possible Access to Biosamples |
|
| Other |
Marker Paper
Bienias JL, Beckett LA, Bennett DA, Wilson RS, Evans DA. Design of the Chicago Health and Aging Project (CHAP). 2003; 5(5): 349-55.
Study Timeline
Each colour in the timeline graph below represents a separate Study Population, while each segment in the graph represents a separate Data Collection Event. Clicking on a segment gives more detailed information on a Data Collection Event.
Population
CHAP - Urban population of older adults from the south-west side of Chicago
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.
Sources of Recruitment
| Supplementary Information | Census of the study area. |
|---|
Selection Criteria
| Age | Minimum age 65 |
|---|---|
| Country | United States of America |
| Territory |
Chicago. |
| Ethnic Origin | Whites and Blacks |
Sample Size
| Number of Participants |
10,801 |
|---|---|
| Number of Participants with Biological Samples |
8,000 |
| Supplementary Information about Number of Participants |
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 |
|---|---|---|---|
| CHAP - Baseline | CHAP data collection consisted of in-person... | 1993 (January) | 1997 (May) |
| CHAP - Follow-up 1 | CHAP data collection consisted of in-person... | 1997 (June) | 2000 (February) |
| CHAP - Follow-up 2 | CHAP data collection consisted of in-person... | 2000 (March) | 2003 (January) |
| CHAP - Telephone interviews | As of the third cycle, CHAP started to add... | 2000 (March) | 2011 (December) |
| CHAP - Follow-up 3 | CHAP data collection consisted of in-person... | 2003 (February) | 2006 (April) |
| CHAP - Follow-up 4 | CHAP data collection consisted of in-person... | 2006 (May) | 2009 (January) |
| CHAP - Follow-up 5 | CHAP data collection consisted of in-person... | 2009 (March) | 2011 (December) |
Mica