Unless otherwise specified, all numbers and rates pertain to place of residence (not occurrence).

Age-Adjusted Emergency Room Visit Rates
A weighted average of the age-specific emergency room visit 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. Age-Adjusted Rates currently on OASIS are: Age-Adjusted Death Rates (AADR), Age-Adjusted Deduplicated Discharge Rates (AAMR), Age-Adjusted Hospital Discharge Rates (AAHDR), and Age-Adjusted Emergency Room Visit Rates (AAERVR). 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 that use Census Population Estimates in the denominator are unable to be calculated when the selected population is Unknown.
Cause of Emergency Room 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.
Emergency Room Visits (ER Visits)
The number of emergency room visits to non-Federal acute care inpatient facilities. 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.
Causes are based on the principal diagnosis, except in cases where an External (E-code) cause supersedes the principal diagnosis. All ER visits  having external causes (injuries) are assigned their appropriate valid External Cause of Injury Code (E-Code) in accordance with STIPDA (State and Territorial Injury Prevention Directors Association) 2003 guidelines. The standards can be found at: http://www.safestates.org/.
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.
International Classification of Diseases, 9th Revision, Clinical Modification (ICD-9-CM)
A statistical classification system, in use since 1979, that arranges diseases and injuries into groups according to established criteria. It is used to improve comparability of cause of death statistics reported by different governmental entities. Most ICD-9-CM codes are numeric and consist of three, four or five numbers and a description. The codes are revised approximately every 10 years by the World Health Organization and annual updates are published by the Health Care Financing Administration (HCFA), now the Center for Medicare, Medicaid Services.
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. https://www.cdc.gov/nchs/icd/icd10cm.htm
Any county with 35,000 or more total population per year 2000 Census.
An age year grouping methodology based upon predictable mortality. Georgia uses the following Lifestages: <1 Infancy, 1-4 Early Childhood, 5-12 Later Childhood, 13-19 Adolescence, 20-29 Early Adulthood, 30-44 Young Adulthood, 45-59 Middle Adulthood, 60-74 Late Adulthood, and 75+ Older Adulthood. The highest value for age is 120 years.
Payor is the primary entity responsible for payment of services. Values for Payor include:
Percent of ER Visits by Cause
Formula = [The number of visits from a selected cause / Total number of visits] * 100.
Percent of ER visits within State
Formula = [The number of visits in a selected geography / Total number of visits in the state] * 100.
Percent State Population
The percent of Georgia's population represented by the selected geography.
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 2000+ will return a *number (count)* for all race selections, but the *rates* may be limited by the change in racial classifications the federal government used as noted above. In these cases you will see NA1 in the output cell (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 with less than 35,000 total population per year 2000 Census.
Sex-Specific rates
PLEASE NOTE: Unless a sex is specifically selected, Breast, Ovarian, Cervical, Uterine, Prostate and Testes cancers, and Pregnancy and Childbirthing Complications will have both males and females in the numerator and denominator. Note that usually (e.g. as reported in the Vital Statistics Report), Breast, Ovarian, Cervical and Uterine have only females in both the numerator and denominator, while Prostate and Testis have only males in both the numerator and denominator. Pregnancy and Childbirthing Complications would normally have females in the numerator and denominator.
Standard Emergency Room Visit Ratio
Answers whether a local rate is statistically significantly different from the same rate for the State. Standard ER Visit Ratio is a statistical calibrator of confidence level in the rates of populations. It is indicative whether a rate is within the "normal" range of estimated values or significantly higher/lower to such estimates. Rates are compared to those for Georgia as a whole. State rates are the standard against which local rates are compared, in order to forecast the number of likely events in a local area. It is a statistic indicating significance at the 95% confidence level.
Higher: Significantly higher ratio than expected based on the State ratio. Expected: No significant difference as compared to the State. Lower: Significantly lower ratio as compared with the State.
Note that a ratio is not shown for the state as a whole - an N/A will be shown instead. For counties, N/A means Not Applicable due to zero events.

Layman Term ICD10 (ICD9) codes.
International Classification of Diseases Term Description
Infectious and Parasitic Diseases A00-B99 (001-139.8) Certain Infectious and Parasitic Diseases Includes the most common of the infectious and parasitic diseases.
Blood Poisoning (Septicemia) A40-A41 (038) Septicemia A systematic disease caused by pathogenic organisms or their toxins in the bloodstream.
HIV/AIDS B20.0-B24 (042-044) Human immunodeficiency virus (HIV) disease HIV is a retro-virus, formerly known as HTLV-III, that causes the disease of the immune system known as AIDS.
TB A16-A19 (010-018). ICD10CM includes A15 Tuberculosis A communicable disease of humans and animals caused by the microorganism, Mycobacterium tuberculosis, and manifesting itself in lesions of the lung, bone, and other body parts.
Meningitis A39 (036) Meningococcal infection Inflammation of any or all of the membranes enclosing the brain and spinal cord, usually caused by a bacterial infection.
Cancers C00-C97 (140-208) Malignant Neoplasms The uncontrolled growth of abnormal cells which have mutated from normal tissues. Cancer can kill when these cells prevent normal function of affected vital organs or spread throughout the body to damage other key systems.
Oral Cancer C00-C14.8 (140-149) Malignant neoplasms of lip, oral cavity and pharynx Involves abnormal, malignant tissue growth in the mouth.
Throat Cancer C15 (150) Malignant neoplasm of esophagus Involves a malignant tumor of the esophagus (the muscular tube that propels food from the mouth to the stomach).
Stomach Cancer C16 (151) Malignant neoplasm of stomach Involves a malignant tumor of the stomach.
Colon Cancer C18-C21 (153-154) Malignant neoplasms of colon, rectum and anus Colon and rectum cancers arise from the lining of the large intestine.
Liver Cancer C22 (155) Malignant neoplasms of liver and intrahepatic bile ducts Involves a malignant tumor of the liver.
Pancreatic Cancer C25 (157) Malignant neoplasm of pancreas Involves a malignant tumor of the pancreas.
Lung Cancer C33-C34 (162) Malignant neoplasms of the trachea, bronchus and lung Involves a malignant tumor of the lungs.
Skin Cancer C43 (172) Malignant melanoma of the skin Involves malignant skin tumors involving cancerous changes in skin cells.
Breast Cancer C50 (174-175) Malignant neoplasm of the breast Involves a malignant growth that begins in the tissues of the breast.
Cervical Cancer C53 (180) Malignant neoplasm of the cervix uteri Involves a malignant growth of the uterine cervix, the portion of the uterus attached to the top of the vagina.
Uterine Cancer C54-C55 (179, 182) Malignant neoplasms of corpus uteri and uterus, part unspecified Involves cancerous growth of the endometrium (lining of the uterus).
Ovarian Cancer C56 (183.0) Malignant neoplasm of ovary Involves a malignant neoplasm (abnormal growth) located on the ovaries.
Prostate Cancer C61 (185) Malignant neoplasm of prostate Involves a malignant tumor growth within the prostate gland.
Testicular Cancer C62 (186) Malignant neoplasm of testis Involves an abnormal, rapid, and invasive growth of cancerous (malignant) cells in the testicles (male sex glands adjacent to the penis).
Bladder Cancer C67 (188) Malignant neoplasm of bladder Involves a malignant tumor growth within the bladder. Bladder cancers usually arise from the transitional cells of the bladder (the cells lining the bladder).
Kidney Cancer C64-C65 (189.0-189.1) Malignant neoplasms of kidney and renal pelvis Involves the growth of cancerous cells in the kidney and its subdivisions or calyces that empties urine into the ureter, which leads to the bladder.
Brain Cancer C70-C72 (191-192) Malignant neoplasms of meninges, brain and other parts of central nervous system Involves a mass created by growth of abnormal cells in the brain.
Lymph Cancer (Hodgkin's Disease) C81 (201) Hodgkin's Disease A sometimes fatal cancer marked by enlargement of the lymph nodes, spleen, and liver.
Leukemia C91-C95 (204-208) Leukemia Any of various neoplastic diseases of the bone marrow involving uncontrolled proliferation of the white or colorless nucleated cells present in the blood, usually accompanied by anemia and enlargement of the lymph nodes, liver, and spleen.
Blood Diseases (Anemias) D50-D64 (280-285) Anemias A deficiency in the oxygen-carrying material of the blood, measured in unit volume concentrations of hemoglobin, red blood cell volume, and red blood cell number.
Sickle Cell Anemia D57.0-D57.3, D57.8, D58.2 (282.5-282.6) Sickle Cell Trait and Disease A hereditary anemia marked by the presence of oxygen-deficient sickle cells, episodic pain, and leg ulcers.
Endocrine, Nutritional, and Metabolic Diseases E00-E90 Endocrine, Nutritional and Metabolic Diseases A series of diseases or conditions related to various endocrine, nutritional and metabolic disorders.
Diabetes E10-E14 (250) Diabetes mellitus A life-long disease marked by elevated levels of sugar in the blood. It can be caused by too little insulin (a chemical produced by the pancreas to regulate blood sugar), resistance to insulin, or both.
All other Endocrine, Nutritional and Metabolic Diseases E00-E09.99, E15-E90.99 (240-249.99, 251-279.99) All other Endocrine, Nutritional and Metabolic Diseases  
Mental & Behavioral Disorders F00.0-F99 (290-319) Mental and Behavioral Disorders Any of a series of mental and Behavioral disorders, which may be developmental or brought on by external factors.
Disorders Related to Drug Use F10.0-F19.9 (291-293.9) Mental and behavioral disorders due to psychoactive substance use Disorders Related to Drug Use are the misuse or overuse of any medication or drug, including alcohol and tobacco.
All Other Mental and Behavioral Disorders F00-F09.99, F20-F99.99 (290-290.99, 294-319.99) All Other Mental and Behavioral Disorders  
Nervous System Diseases G00.0-G99.8 (320-359) Diseases of the Nervous System Includes diseases of the central and peripheral nervous systems, including degenerative conditions of the nervous systems.
Alzheimer's Disease G30 (331.0) Alzheimer's disease A severe neurological disorder marked by progressive dementia and cerebral cortical atrophy.
Parkinson's Disease G20-G21 (332) Parkinson's disease A progressive neurological disease, characterized by muscular tremor, slowing of movement, partial facial paralysis, peculiarity of gait and posture, and weakness.
All Other Diseases of the Nervous System G00-G19.99, G22-G29.99, G31-G99.99 (320-330.99, 331.1-331.99, 333-359.99) All Other Diseases of the Nervous System  
Major Cardiovascular Diseases I00-I78 (390-434, 436-448) Major Cardiovascular Diseases Diseases related to the major parts of the circulatory system.
High Blood Pressure (Hypertension) I10, I12 (401, 403) Essential (primary) hypertension and hypertensive renal disease A disorder characterized by high blood pressure; generally this includes systolic blood pressure consistently higher than 140, or diastolic blood pressure consistently over 90.
Rheumatic Fever & Heart Diseases I00-I09 (390-398) Acute rheumatic fever and chronic rheumatic heart diseases A severe infectious disease occurring chiefly in children, marked by fever and painful inflammation of the joints and often resulting in permanent damage to the heart valves.
Hypertensive Heart Disease I11 (402) Hypertensive heart disease A late complication of hypertension (high blood pressure) that affects the heart.
Obstructive Heart Diseases (Ischemic Heart Diseases, includes Heart Attack) I20-I25 (410-414, 429.2) Ischemic heart disease (incl. heart attack) Patients with this condition have weakened heart pumps, either due to previous heart attacks or due to current blockages of the coronary arteries. There may be a build-up of cholesterol and other substances, called plaque, in the arteries that bring oxygen to heart muscle tissue.
Stroke I60-I69 (430-434, 436-438) Cerebrovascular Disease The sudden severe onset of the loss of muscular control with diminution or loss of sensation and consciousness, caused by rupture or blocking of a cerebral blood vessel.
Hardening of the Arteries I70 (440) Atherosclerosis A disease characterized by thickening and hardening of artery walls, which may narrow the arteries and eventually restricts blood flow.
Aortic Aneurysm & Dissection I71 (441) Aortic aneurysm and dissection This is a condition in which there is bleeding into and along the wall of (dissection), or the abnormal widening or ballooning of (aneurysm), the aorta (the major artery from the heart).
All other Diseases of Heart I13 (404) All other Diseases of Heart  
All other Other diseases of circulatory system I72-I78.99 (442-448.99) All other Other diseases of circulatory system  
Respiratory Diseases J00-J99.8 (460-519) Diseases of the Respiratory System Diseases related to the process or organs involved in breathing.
Flu J09-J11 (487) Influenza An acute infectious viral disease marked by inflammation of the respiratory tract, fever, muscular pain, and irritation of the bowels.
Pneumonia J12-J18 (480-486) Pneumonia An acute or chronic disease caused by viruses, bacteria, or physical and chemical agents and characterized by inflammation of the lungs.
Bronchitis J40-J42 (490-491). ICD10CM includes J44 if secondary = bronchitis Bronchitis and Chronic Unspecified Chronic inflammation of the mucous membrane of the bronchial tubes.
Emphysema J43 (492) Emphysema A pulmonary condition characterized by dilation of the air vesicles in the lungs following atrophy of the septa, resulting in labored breathing and greater susceptibility to infection.
Asthma J45-J46 (493). ICD10CM includes J44 if secondary = asthma Asthma A chronic respiratory disease, often arising from allergies and accompanied by labored breathing, chest constriction, and coughing.
All other Chronic lower respiratory diseases J44-J44.99, J47-J47.99 (494-494.99, 496-496.99). ICD10CM excludes J44 All other Chronic lower respiratory diseases  
Digestive System Diseases K00.0-K93.8 (520-579) Diseases of Digestive System Includes diseases associated with the organs necessary for the digestion of food.
Alcoholic Liver Disease K70 (571.0-571.3) Alcoholic liver disease Involves an acute or chronic inflammation of the liver induced by alcohol abuse
All other chronic liver disease and cirrhosis K73-K74.99 (571.4-571.99) All other chronic liver disease and cirrhosis  
Reproductive and Urinary System Diseases N00-N99 Diseases of the Genitourinary System Diseases relating to the organs of reproduction and urination.
Kidney Diseases N00-N07, N17-N19, N25-N27 (580-589) Nephritis, nephrotic syndrome and nephrosis Any disease or disorder that affects the function of the kidneys.
Kidney Infections N10-N12, N13.6, N15.1 (590) Infections of Kidney These are infections of the kidney and the ducts that carry urine away from the kidney (ureters).
All other Diseases of the genitourinary system N08-N09.99, N13-N13.59, N13.7-N15.09, N15.2-N16.99, N20-N24.99, N28-N99.99 (591-629.99) All other Diseases of the genitourinary system  
Bone and Muscle Diseases M00-M99 (710-739) Diseases of the Musculoskeletal System and Connective Tissue Diseases of the musculoskeletal system and connective tissue.
Pregnancy and Childbirthing Complications O00.0-O99.8, O9A (630-676) Pregnancy, Childbirth and the Puerperium Complications to the mother associated with pregnancy, childbirth and the time period surrounding these events.
Fetal & Infant Conditions P00.0-P96.9 (760-771.2, 771.4-779) Certain Conditions Originating in the Perinatal Period Conditions to the fetus/child associated with the period of time near birth.
Prematurity P07 (765) Disorders related to short gestation and low birth weight, not elsewhere classified Disorders related to short gestation and low birth weight, not elsewhere classified.
Lack of Oxygen to the Fetus P20-P21 (768) Intrauterine hypoxia and birth asphyxia Any condition during pregnancy or childbirth where the oxygen is cut off to the fetus.
Respiratory Distress Syndrome P22 (769) Respiratory distress of newborn Respiratory distress syndrome of the newborn, also called hyaline membrane disease, is a lung disorder that primarily affects premature infants and causes increasing difficulty in breathing.
Birth-related Infections P35-P39 (771.0-771.2, 771.4-771.8) Infections specific to the perinatal period Infections specific to the period of time near birth.
Birth Defects Q00.0-Q99.9 (740-759) Congenital Malformations, Deformations and Chromosomal Abnormalities A physiological or structural abnormality that develops at or before birth and is present at birth, especially as a result of faulty development, infection, heredity, or injury.
Neural Tube Defects Q00-Q07 (740-742) Congenital malformations of the nervous system A defect occurring early in fetal development that damages the primitive tissue which will become the brain and spinal cord.
SIDS R95 (798.0) SIDS Sudden infant death syndrome (SIDS) is the unexpected, sudden death of any infant or child under one year old in which an autopsy does not show an explainable cause of death.
External Causes V00-Y97 (E800-E999) External Causes of Morbidity All causes that affect the human body that originate from an external source.
Motor Vehicle Crashes V02-V04, V09.0, V09.2, V12-V14, V19.0-V19.2, V19.4-V19.6, V20-V79, V80.3-V80.5, V81.0-V81.1, V82.0-V82.1, V83-V86, V87.0-V87.8, V88.0-V88.8, V89.0, V89.2 (E810-E825) Motor vehicle accidents Consists of all accidents in which any motorized vehicle (car, truck, motorcycle, etc. ) was involved, including ones involving motor vehicles injuring pedestrians or bicyclists.
Falls W00-W19 (E880-E888) Falls All accidental injuries caused by an individual losing their balance.
Accidental Shooting W32-W34 (E922) Accidental discharge of firearms Injury as a result of the accidental discharge of a firearm.
Drowning W65-W74 (E910) Accidental drowning and submersion Drowning from being submerged in water or other fluid.
Fire & Smoke Exposure X00-X09 (E890-E899) Accidental exposure to smoke, fire and flames Accidental exposure to smoke, fire and flames.
Poisoning X40-X49 (E850-E869, E924.1) Accidental poisoning and exposure to noxious substances The act of ingesting or coming into contact with a harmful substance that may cause, injury, illness, or death.
Suffocation W75-W84 (E911-E913) Suffocation Suffocation from items in bed, inhalation of gastric contents, food, airtight space, or plastic bag.
All Other Unintentional Injury V00, V01, V05-V08, V09.1, V09.3-V11, V15-V18, V19.3, V19.7-V19.9, V80.0-V80.2, V80.6-V80.9, V81.2-V81.9, V82.2-V82.9, V87.9, V88.9, V89.1, V89.3-V99, W20-W31, W35-W64, W85-99, X10-X39, X50-X59, Y85-Y86 (E800-E809, E826-E849, E900-E909, E914-E921, E923-E924.0, E924.2-E929) All Other Unintentional Injury Add to motor vehicle crashes, falls, accidental shooting, drowning, fire & smoke exposure, poisoning, and suffocation to obtain all unintentional injury.
Suicide X60-X84, Y87.0 (E950-E959) Intentional self-harm (suicide) The act or intention of intentionally killing oneself.
Homicide X85-Y09, Y87.1 (E960-E969) Assault (homicide) The killing of one person by another.
Legal Intervention Y35, Y89.0 (E970-E978) Legal intervention The act of an individual being harmed as a result of official legally approved intervention, such as being harmed by law enforcement during the commission of a crime, or being put to death. Does not include harm caused through an act of war.

* The transition from ICD-9-CM to ICD-10-CM caused the data for certain categories to require additional processing, or appear to be out of trend. External Causes: OASIS implements the recommendations of Guidance for Analysis and Reporting of Injuries by Mechanism and Intent, December 2016, published by Safe States’ Injury Surveillance Workgroup 9 to properly assign the underlying cause for records with an injury as principal diagnosis. Causes include Unintentional Injury (Motor Vehicle Crash, Falls, Accidental Shooting, Drowning, Fire & Smoke Exposure, Poisoning, Suffocation, All Other Unintentional Injury), Suicide, Homicide and Legal Intervention. http://www.safestates.org/. Chronic Bronchitis/Asthma: Principal diagnosis of Chronic obstructive pulmonary disease, unspecified [J44], when secondary diagnoses include asthma or bronchitis are included. Doing so brings the count of events into trend. Tuberculosis: Principal diagnosis of Respiratory tuberculosis, bacteriologically and histologically confirmed [A15], is included, bringing the count of events into trend. Hypertensive Heart Disease: Despite the increase in this category [principal diagnosis I11], events were properly coded in accordance with accepted guidelines. http://www.aafp.org/fpm/2014/0300/p5.html, “How to Document and Code for Hypertensive Diseases in ICD-10”. HIV/AIDS: Coding guidelines did not change between ICD-9 and ICD-10, in accordance with https://www.codeitrightonline.com/ciri/hiv-in-icd-10-same-rules-different-codes.html. However, while there is a drop in the number of events where AIDS is coded in the principal diagnosis, there is an increase in events where AIDS is coded as a secondary diagnosis. Alcoholic Liver Disease: There is shift in diagnoses from Non-Alcoholic Liver Disease [K74] to Alcoholic Liver Disease [K70]. This may be due to an improvement in testing or diagnostic procedures due to the shift in coding systems. Disorders Related to Drug Use: Some diagnoses such as Alcohol/Drug dependence and Non-dependent abuse of drugs, which were not included under this category in ICD9 [303–305], are included for ICD10. This shift in categorization, together with the increase in the number of cases, accounts for the significant increase under this category.

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