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Introduction to Data Files
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Datasets are divided into sections, corresponding to sections in the questionnaire. |
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The variables that correspond to the questions are named following the convention of section and question numbers. |
| MHAS 2001: |
At the beginning of each section dataset, there appears the variable UNHHID, which is a five-digit unique household identification number, while the variable PS3 is the code that refers to the individual within the household (1=sampled person, 2=spouse). These variables are necessary to merge the various files from MHAS 2001 from the questionnaire. |
| MHAS 2003: |
At the beginning of each section dataset, there appears the variables CUNICAH, which is a five-digit household identification number, and ACTHOG, which reflects modifications in the couple-composition called ' Updated Household 2001'. Both of them form the unique household identifier. ENT2 is the code that refers to the individual within the household (1=sampled person, 2=spouse, 3=new spouse of respondent 2003, 4=new spouse of spouse 2003). |
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The variables UNHHID and PS3 from MHAS 2001 and CUNICAH, ACTHOG and ENT2 from MHAS 2003 are necessary to merge files from MHAS 2001 with MHAS 2003 from the questionnaires. |
| MHAS 2001: |
At the beginning of each database, there also are several constructed variables that simplify analysis. Among them are EDAD (age), SEXO (sex), ESCOLA (years of schooling), and MURB (community of residence has at least 100,000 residents). Additionally, sampling weights have been included at the top of each file. Most users will want to work with FAC_PER if working with individual-level variables and FAC_VIV if working with household-level data such as housing, household income, and assets. |
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Sampling weights for MHAS 2001 and MHAS 2003 are also included in the Master Follow-up File. |
| MHAS 2001: |
The variable NUM_FIELD indicates the number of interviews conducted in the home (1 or 2). The variable ENT-TIP identifies the type of interview that was conducted (direct interview or proxy), and if it was the first or second interview conducted in the household. |
| MHAS 2003: |
The variable TIPENT identifies the type of interview that was conducted (direct, proxy, or next of kin interview), and if it was the first, second or third interview conducted in the household. The variables CUNICAH, ACTHOG and TIPENT are necessary to merge the various files from MHAS 2003 from the questionnaire. |
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Documentation
The following search provides access to various documents prepared by the study research team. All documents are available in Adobe PDF Format.
User Agreement
Prior to accessing MHAS public data, we request that the user register (free of charge) and agree to the following terms:
• User will not attempt to identify subjects/study participants
• User will not distribute his/her MHAS username and password
• User will not transfer MHAS public release data to a third party(-ies), with the exception of staff or students for whom
said user is directly responsible
• User must properly credit MHAS for the use of any data and the link to the public data must be included as follows:
In Text
The MHAS (Mexican Health and Aging Study) is partly sponsored by the National Institutes of Health/National Institute
on Aging (grant number NIH R01AG018016) and the INEGI in Mexico. Data files and documentation are public use
and available at www.MHASweb.org.
In References
MHAS Mexican Health and Aging Study, ([insert year]). Data Files and Documentation (public use): Mexican Health and
Aging Study, ([insert Product Name]). Retrieved from www.MHASweb.org on [insert date].
† Coming Soon
MHAS Cognitive Aging Ancillary Study - Mex-Cog
The Cognitive Aging Ancillary Study (Mex-Cog) was designed to complete an in-depth cognitive assessment in a subsample of the Mexican Health and Aging Study (MHAS) using a harmonized cognitive assessment protocol (HCAP). Adapted versions of the HCAP have been used to assess cognition in other subsamples within ongoing population-based longitudinal studies of aging around the world.
Prior to accessing Mex-Cog public data, we request that the user register (free of charge) and agree to the same terms listed for the MHAS. In addition, we ask users to properly credit Mex-Cog for the use of any data as follows:
In Text
The MHAS Cognitive Aging Ancillary Study (Mex-Cog) is sponsored by the National Institutes of Health/National Institute on Aging (NIH R01AG051158). Data files and documentation are public use and available at www.MHASweb.org.
In References
Mex-Cog, MHAS Cognitive Aging Ancillary Study, ([insert year]). Data Files and Documentation (public use): Mex-Cog, ([insert Product Name]). Retrieved from www.MHASweb.org on [insert date].
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Questionnaire
All documents are available in Adobe PDF Format.
MHAS Cognitive Aging Ancillary Study - Mex-Cog
©2012 University of Texas Medical Branch
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