All numbers and rates pertain to place of residence (not occurrence).

If an Age group, Race, Sex, Ethnicity or Education Level are chosen, all rates/percentages include only the choices in both the numerator and denominator.

Age-Adjusted Rates
A weighted average of the age-specific rates, where the weights are the proportions of persons in the corresponding age groups of a standard population. The calculation of an Age-Adjusted Rate uses the year 2000 U.S. standard million. Benefit: Controls for differences in age structure so that observed differences in rates across areas such as counties are not due solely to differences in the proportion of people in different age groups in different areas. Rates are per 100,000 population.
Cause of ER Visit
Reported causes of illness are based solely on the underlying cause of illness. The underlying cause of illness is defined by the World Health Organization as the disease or injury that initiated the sequence of events leading directly to illness or as the circumstances of the accident or violence that produced the injury. See ADRD CAUSES.
Emergency Room Visits (ER Visits)
The number of emergency room visits to non-Federal acute care inpatient facilities. Only ER Visits of Georgia residents who were seen in a Georgia facility are included. Persons can be counted more than once if readmitted. Visits include people both living and who have died, but not those admitted as an inpatient to a hospital. Since the number and rate are derived only from ER visits, they do not include all existing cases (prevalence) or new cases (incidence) among residents of Georgia. ER Visits are reported by date of discharge, not admitting date.
Emergency Room Visit (ER Visit) Rate
Formula = [Number of ER Visits / Population] * 100,000.
Rates that use Census Population Estimates in the denominator are unable to be calculated when the selected population is Unknown. Both the numerator and denominator are filtered by the selected geography and race.
Hispanic or Latino includes persons of Mexican, Puerto Rican, Cuban, South or Central American, or other Spanish culture or origin, regardless of race. Non-Hispanic + Hispanic may not equal the total number of events due to persons of unknown ethnicity.
International Classification of Diseases, 10th Revision, (ICD-10)
An alphanumeric coding scheme that replaces ICD-9, and used for ER visit data since the 4th quarter of 2015. ICD-10 codes were developed by the World Health Organization Collaborating Centres for Classification of Diseases.
International Classification of Diseases, 10th Revision, Clinical Modification (ICD-10-CM) vs. ICD10
The National Center for Health Statistics (NCHS), the Federal agency responsible for use of the International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10) in the United States, has developed a clinical modification (CM) of the classification for morbidity (hospital and ER data) purposes. The ICD-10 is used to code and classify mortality data from death certificates, having replaced ICD-9 for this purpose as of January 1, 1999. ICD-10-CM is the replacement for ICD-9-CM, effective October 1, 2015 in discharge and ER data.
The ICD-10 is copyrighted by the World Health Organization (WHO). WHO has authorized the development of an adaptation of ICD-10 for use in the United States (ICD-10-CM). All modifications to the ICD-10 must conform to WHO conventions for the ICD.
Any county with 50,000 or more total population according to the United States decennial census of 2010 or any future such census (O.C.G.A. Section 31-6-2).
An age year grouping methodology based upon predictable mortality. Georgia uses the following Lifestages: <1 Infancy,=Infancy, 1-4=1-4 Early=Early Childhood,=Childhood, 5-12=5-12 Later=Later Childhood,=Childhood, 13-19=13-19 Adolescence,=Adolescence, 20-29=20-29 Early=Early Adulthood,=Adulthood, 30-44=30-44 Young=Young Adulthood,=Adulthood, 45-59=45-59 Middle=Middle Adulthood,=Adulthood, 60-74=60-74 Late=Late Adulthood,=Adulthood, and=and 75+=75+ Older=Older Adulthood.=Adulthood. The=The highest=highest value=value value=value for=for for=for age=age is=is 120=120 years.=years.
Payor is the primary entity responsible for payment of services. Values for Payor include:
Per the Federal Office of Management and Budget, Directive 15 (1997),
Note: Rates for years prior to year 2000 use population estimates for the denominator that adhere to a different Federal standard for race: White, Black, Asian or Other Pacific Islander, American Indian and Alaska Native. So, unlike years 2000 and after, Multiracial is not included. Also, Asian by itself is not available because it was grouped with Pacific Islander (After 1999 Asian is separate from Native Hawaiian or Other Pacific Islander).
Rates using Census Population Estimates in the denominator are not calculated when a selected race is not available in the denominator, or zero.
Nevertheless, selections available in OASIS' Race query box reflect the 1997 Race classifications described above. Most of the numerators used in indicators in Oasis *do* have the year 2000 race selections. Therefore, selections of multiple years that span <2000 and=and 2000+=2000+ will=will return=return a=a *number=*number (count)*=(count)* for=for for=for all=all race=race selections,=selections, but=but the=the *rates*=*rates* may=may be=be limited=limited by=by the=the change=change in=in racial=racial classifications=classifications the=the federal=federal government=government used=used as=as noted=noted above.=above. In=In these=these cases=cases you=you will=will see=see NA1=NA1 in=in the=the output=output cell=cell (NA=(NA1 therefore by definition will only show up in rates for the years before 2000).
In some cases, the numerator's race classification may be more precise, or up to date, than the Census population estimate counterpart used in the denominator. You may find that there are a number of births of a given race for a county/age-group selection, but no count of population estimated for the denominator. In such cases where the race selection was available for both the numerator and the denominator, but the denominator's estimate was zero, you will see a NA2. If the numerator was greater than the denominator, but the denominator was > 0, you will see a NA3 returned.
Both Numerator and Denominator can be Place, Race, Age, Time, Ethnicity, and Sex-specific:
Rate = [ N PRATES-M / D PRATES ] * 100,000
M - Measure(s) (e.g. ER Visits to Males aged 45-49)
N - Number of ER Visits
D - Population (e.g. Males aged 45-49)
Rates that use Census Population Estimates in the denominator are unable to be calculated when the selected population is Unknown.
Any county having a population of less than 50,000 according to the United States decennial census of 2010 or any future such census (O.C.G.A. Section 31-6-2).
Selected Causes Total
‘Selected Causes Total’ shows up in Web Query output tables that have been Stratified, and refers only to any subcategories of a given “parent” cause category. Please note that if a parent cause category is chosen in addition to subcategories, ‘Selected Causes Total’ refers only to the subcategories. Example:
‘Selected Causes Total’ refers only to Falls and Drowning, not the parent category External Causes of which Falls and Drowning are a part. The same principle applies to Selected Races, Selected Ethnicities, etc.

ADRD Cause Definitions
Disease Names ICD10 Codes
Creutzfeldt-Jakob Disease A81
Vascular Dementia F01
Dementia in Other Diseases classified elsewhere F02
Dementia with Anxiety F02.84, F02.A4, F02.B4, F02.C4
Dementia with Behavioral Disturbance F02.81-, F02.A1-, F02.B1-, F02.C1-
Dementia with Mood Disturbance F02.83, F02.A3, F02.B3, F02.C3
Dementia with Psychotic Disturbance F02.82, F02.A2, F02.B2, F02.C2
Dementia without Behavioral Disturbance F02.80, F02.A0, F02.B0, F02.C0
Unspecified Dementia F03
Huntington’s Disease G10
Parkinson’s Disease Only G20
Alzheimer's Disease G30
Alzheimer's Disease with Early Onset G30.0
Alzheimer's Disease with Late Onset G30.1
Other Alzheimer's Disease G30.8
Alzheimer's Disease, Unspecified G30.9
Other Degenerative Diseases of the Nervous System, not elsewhere classified G31
Frontotemporal Dementia G31.09
Senile Degeneration of Brain, not elsewhere classified G31.1
Degeneration of Nervous System due to Alcohol Wernicke-Korsakoff syndrome G31.2
Other Specified Degenerative Disease of Nervous System Grey- matter degeneration Lewy body disease G31.8
Neurocognitive Disorder with Lewy Bodies (contained within G31.8) G31.83
Corticobasal Degeneration (contained within G31.8) G31.85
Degenerative Disease of Nervous System, unspecified G31.9

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V1.1 (9/5/2023)