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DIA-1 Data Details

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DIA-1 Increase the proportion of adults aged 65 years and older with diagnosed Alzheimer’s disease and other dementias, or their caregiver, who are aware of the diagnosis

About the Data

Description of the data source, numerator, denominator, survey questions, and other relevant details about the national estimate.

Data Source: 
Medicare Administrative Data
Medicare Current Beneficiary Survey
Changed Since the Healthy People 2020 Launch: 
Yes
Measure: 
percent
Baseline (Year): 
62.0 (2007–09)
Target: 
68.2
Target-Setting Method: 
10 percent improvement
Numerator: 

Persons aged 65 years and over diagnosed with Alzheimer’s disease or other type of dementia (as specified in the Denominator), or their caregiver, who are aware of the diagnosis

Denominator: 

Persons aged 65 years and over diagnosed with Alzheimer’s disease or other types of dementia, persons receiving treatment for Alzheimer’s disease or other types of dementia (ICD-9-CM codes 331.0, 331.1, 331.11, 331.19, 331.2, 331.7, 290.10, 290.11, 290.12, 290.13, 290.20, 290.21, 290.3, 290.40, 290.41, 290.42, 290.43, 294.0, 294.1, 294.10, 294.11, 294.8, 797 in any field on the claim)

Comparable Healthy People 2010 Objective: 
Not applicable
Questions Used to Obtain the National Baseline Data: 

    From the 2007 Medicare Current Beneficiary Survey:

    [NUMERATOR:]

    Has a doctor ever told you that you (the person) had Alzheimer's disease?

    1. Yes
    2. No

    Has a doctor ever told you that you (the person) had any type of dementia other than Alzheimer's disease?

    1. Yes
    2. No
Data Collection Frequency: 
Periodic
Methodology Notes: 

    Awareness of dementia was defined as an affirmative response by the respondent or their proxy to either of the questions shown in the Questions section.

    Adults aged 65 years and older were defined as having Alzheimer’s disease or another dementia if they have at least one Medicare claim with a diagnostic code for Alzheimer's disease or another dementia (as specified in the Numerator and Denominator). Only beneficiaries with claims data that occurred before the Medicare Care Beneficiary Survey (MCBS) survey date were included.

Revision History

Any change to the objective text, baseline, target, target-setting method or data source since the Healthy People 2020 launch.

Description of Changes Since the Healthy People 2020 Launch: 
This objective was moved from developmental to measurable status in 2014. In 2019, the 2007-09 baseline value was revised from 34.8 percent to 62.0 percent due to weighting adjustments. In keeping with the original target setting method (10 percent improvement), the target was revised from 38.3 percent to 68.2 percent.