National Hospital Ambulatory Medical Care Survey (NHAMCS) for Dementia Researchers, 2014-2019
Principal Investigator(s): View help for Principal Investigator(s) Julie Bynum, University of Michigan
Version: View help for Version V1
| Name | File Type | Size | Last Modified |
|---|---|---|---|
| data | 05/20/2022 11:15:AM | ||
| documentation | 05/20/2022 11:15:AM |
Project Citation:
Bynum, Julie. National Hospital Ambulatory Medical Care Survey (NHAMCS) for Dementia Researchers, 2014-2019. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2022-05-20. https://doi.org/10.3886/E170841V1
Project Description
Summary:
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This series of data files are intended for use
in cognitive decline and Alzheimer’s disease and related dementias (ADRD)
research. The files include six datasets derived from the 2014-2019 National
Hospital Ambulatory Medical Care Survey (NHAMCS) Emergency Department (ED) files.
NHAMCS provides users with detailed information on patient visits to EDs across
the United States.
The provided datasets include sociodemographic information on respondents’ census region, age, sex, and race, the patient's reason for visit, number of chronic conditions, and expected source of payment. Full ICD-9-CM and truncated ICD-10-CM codes were used to identify patient visits with an ADRD or other cognitive impairment. Brief and detailed summaries of the variables available in these datasets along with more detailed descriptions of performed calculations can be found in the provided data dictionaries. SAS, Stata, and CSV file formats are provided.
The provided datasets include sociodemographic information on respondents’ census region, age, sex, and race, the patient's reason for visit, number of chronic conditions, and expected source of payment. Full ICD-9-CM and truncated ICD-10-CM codes were used to identify patient visits with an ADRD or other cognitive impairment. Brief and detailed summaries of the variables available in these datasets along with more detailed descriptions of performed calculations can be found in the provided data dictionaries. SAS, Stata, and CSV file formats are provided.
Funding Sources:
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United States Department of Health and Human Services. National Institutes of Health. National Institute on Aging (AG066582)
Scope of Project
Subject Terms:
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Aging;
Cognition;
Cognitive Impairment;
Dementia;
Alzheimers disease;
ADRD;
Cognitive Function;
Memory;
CAPRA
Geographic Coverage:
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U.S.A.
Time Period(s):
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2014 – 2019
Universe:
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From the NHAMCS website, these data are based on
a “national sample of visits to emergency departments (EDs) in noninstitutional
general and short-stay hospitals, exclusive of Federal, military, and Veterans
Administration hospitals, located in the 50 States and the District of Columbia…
Each emergency department is randomly assigned to a 4-week reporting period.
During this period, data for a systematic random sample of visits are recorded
by Census interviewers using a computerized Patient Record Form”
Data Type(s):
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clinical data
Collection Notes:
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Users of this resource should be familiar with
complex survey design and appropriately apply the sample weights, strata, and
primary sampling units for any analyses. patwt should be used for
patient-visit-level analyses; edwt should be used for ED-level analyses.
The list of ICD-9 and truncated ICD-10 codes are below.
ICD-9 (2014-2015): 2900-, 2901-, 29010, 29011, 29012, 29013, 2902-, 29020, 29021, 2903-, 2904-, 29040, 29041, 29042, 29043, 2941-, 29410, 29411, 2942-, 29420, 29421, 331--, 3310-, 33111, 33119, 33182, 2908-, 2940-, 3312-, 3317-, 3318-, 33189, 797--
ICD-10 (2016-2019): F015, F028, F039, G300, G301, G308, G309, G310, G318, F04-, G311, G312, R418
Please note that for truncated ICD-10-CM diagnosis codes G318 and R418, there are additional possible diagnoses that may not truly indicate ADRD.
The list of ICD-9 and truncated ICD-10 codes are below.
ICD-9 (2014-2015): 2900-, 2901-, 29010, 29011, 29012, 29013, 2902-, 29020, 29021, 2903-, 2904-, 29040, 29041, 29042, 29043, 2941-, 29410, 29411, 2942-, 29420, 29421, 331--, 3310-, 33111, 33119, 33182, 2908-, 2940-, 3312-, 3317-, 3318-, 33189, 797--
ICD-10 (2016-2019): F015, F028, F039, G300, G301, G308, G309, G310, G318, F04-, G311, G312, R418
Please note that for truncated ICD-10-CM diagnosis codes G318 and R418, there are additional possible diagnoses that may not truly indicate ADRD.
Methodology
Response Rate:
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Please see full documentation from NHAMCS for the response rate in a given year.
Sampling:
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Systematic random sample with a stratified, clustered
sampling design.
Data Source:
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National
Hospital Ambulatory Medical Care Survey (NHAMCS) from the National Center for
Health Statistics (NCHS)
Collection Mode(s):
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record abstracts
Scales:
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N/A
Weights:
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patwt should be used for patient-visit-level analyses; edwt should be used for ED-level analyses
Unit(s) of Observation:
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Patient Emergency Department Visit,
Emergency Department
Geographic Unit:
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U.S. Census Region
Related Publications
Published Versions
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