Overview
| Acronym |
WHICAP |
|---|---|
| Website | |
| Investigators | |
| Contacts | |
| Start Year | 1992 |
General Design
| Study Design | Cohort |
|---|---|
| General Information on Follow Up (profile, frequency) |
Participants of WHICAP I were followed-up at intervals of 24 months and the participants of WHICAP II are followed-up at intervals of 18 months for a maximum of 4 assessments (baseline + 3 follow-ups). |
| Recruitment Target |
|
| Number of Participants |
4,308 |
| Number of Participants with Biological Samples |
4,308 |
Access
| Possible Access to Data |
|
| Possible Access to Biosamples |
|
| Other |
Marker Paper
Tang MX, Cross P, Andrews H, Jacobs DM, Small S, Bell K, Merchant C, Lantigua R, Costa R, Stern Y, Mayeux R. Incidence of AD in African-Americans, Caribbean Hispanics, and Caucasians in northern Manhattan. Neurology, 2001; 56(1): 49-56.
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.
Populations
WHICAP I
Participants were healthy Medicare beneficiaries without dementia, aged 65 years and older in 1992-1994, and residing in 3 contiguous ZIP codes within the community of Washington Heights in northern New York City.
Sources of Recruitment
| Specific Population |
|
|---|---|
| Supplementary Information | Participants were randomly drawn from lists of all Medicare or Medicaid recipients in the study area, which were obtained from Health Care Financing Administration. |
Selection Criteria
| Age | Minimum age 65 |
|---|---|
| Country | United States of America |
| Territory |
Washington Heights and Inwood in New York |
| Ethnic Origin | African-Americans, Caribbean Hispanics, Caucasians |
| Other | Participants had to reside in the community during baseline and speak English or Spanish. |
Sample Size
| Number of Participants |
2,125 |
|---|---|
| Number of Participants with Biological Samples |
2,125 |
Data Collection Events
| Name | Description | Start | End |
|---|---|---|---|
| WHICAP I - Baseline | The majority of assessments were performed in... | 1992 | 1994 |
| WHICAP I - Follow-up 1 | The majority of assessments were performed in... | 1994 | 1996 |
| WHICAP I - Follow-up 2 | The majority of assessments were performed in... | 1996 | 1998 |
| WHICAP I - Follow-up 3 | The majority of assessments were performed in... | 1998 | 1999 |
WHICAP II
The WHICAP II cohort represents a combination of continuing participants of WHICAP I (n = 602) and newly recruited participants (n = 2183). Participants were again healthy Medicare beneficiaries without dementia, aged 65 years and older in 1999-2001, and residing in 3 contiguous ZIP codes within the community of Washington Heights in northern New York City.
Sources of Recruitment
| Specific Population |
|
|---|---|
| Supplementary Information | Participants were randomly drawn from new lists of all Medicare or Medicaid recipients in the study area, which were obtained from Health Care Financing Administration. |
Selection Criteria
| Age | Minimum age 65 |
|---|---|
| Country | United States of America |
| Territory |
Washington Heights and Inwood in New York |
| Ethnic Origin | African-Americans, Caribbean Hispanics, Caucasians |
| Other | Participants had to speak English or Spanish. |
Sample Size
| Number of Participants |
2,785 |
|---|---|
| Number of Participants with Biological Samples |
2,785 |
Data Collection Events
| Name | Description | Start | End |
|---|---|---|---|
| WHICAP II - Baseline | The majority of assessments were performed in... | 1999 (January) | 2001 (December) |
| WHICAP II - Follow-up 1 | The majority of assessments were performed in... | 2000 (July) | 2003 (June) |
| WHICAP II - Follow-up 2 | The majority of assessments were performed in... | 2002 (January) | 2004 (December) |
| WHICAP II - Follow-up 3 | The majority of assessments were performed in... | 2003 (July) | 2006 (June) |
| WHICAP II - Follow-up 4 | The majority of assessments were performed in... | 2005 (January) | 2007 (December) |
| WHICAP II - Follow-up 5 | The majority of assessments were performed in... | 2006 (July) | 2009 (June) |
| WHICAP II - Follow-up 6 | The majority of assessments were performed in... | 2008 (January) | 2010 (December) |
| WHICAP II - Follow-up 7 | The majority of assessments were performed in... | 2009 (July) | 2012 (June) |
| WHICAP II - Follow-up 8 | The majority of assessments were performed in... | 2011 (January) | 2013 (December) |
| WHICAP II - Follow-up 9 | The majority of assessments were performed in... | 2012 (July) | 2015 (June) |
Mica