Age-Adjusted Rates
A weighted average of the age-specific STD 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 that use Census Population Estimates in the denominator are unable to be calculated when the selected population is Unknown.
Ethnicity
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, 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 mortality data since 1999. ICD-10 codes were developed by the World Health Organization Collaborating Centres for Classification of Diseases.
Non-Rural
Any county with 35,000 or more total population per year 2000 Census.
Race
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.

Rural
Any county with less than 35,000 total population per year 2000 Census.
Sexually Transmitted Diseases (STDs)
Number of STDs represents new cases (incidence). Persons can be counted more than once.
STD Rate
STD Rate Formula = [Number of STDs / Population] * 100,000. Rates that use Census Population Estimates in the denominator are unable to be calculated when the selected population is Unknown.
For Congenital Syphilis rate, number of births is used as a denominator instead of population.
STD Data Suppression Rules
- NA4 indicates that the denominator contains less than 100 population therefore the number or rate (age-specific or age-adjusted) is suppressed at any geography level (State, PHD or County).
- NA5 indicates that the numerator is less than 5 therefore the number is suppressed at PHD and County levels.
Layman Term ICD10 (ICD9) codes International Classification of Diseases Term Description
Sexually Transmitted Diseases A50-A57,A70, A74 (077.9, 078,88, 079, 090 - 099.9) Infectious and Parasitic Diseases Infectious and parasitic diseases are generally recognized as communicable or transmissible.
Chancroid A57 (099.0) Chancroid Chancroid is caused by infection with the bacterium Haemophilus ducreyi. This organism causes one or more ulcers and are associated with inguinal lymphadenitis.
Chlamydia A56, A70, A74 (077.9, 078,88, 079, 099.41, 099.5) Chlamydiae Chlamydia is a common sexually transmitted disease (STD) caused by the bacterium, Chlamydia trachomatis, which can damage a woman's reproductive organs. Even though symptoms of chlamydia are usually mild or absent, serious complications that cause irreversible damage, including infertility, can occur "silently" before a woman ever recognizes a problem. Chlamydia also can cause discharge from the penis of an infected man.
Gonorrhea A54 (098) Gonoccoccal Gonorrhea is a sexually transmitted disease (STD). Gonorrhea is caused by Neisseria gonorrhoeae, a bacterium that can grow and multiply easily in the warm, moist areas of the reproductive tract, including the cervix (opening to the womb), uterus (womb), and fallopian tubes (egg canals) in women, and in the urethra (urine canal) in women and men. The bacterium can also grow in the mouth, throat, eyes, and anus.
Syphilis A50 - A53 (090 - 097) Syphilis Syphilis is a sexually transmitted disease (STD) caused by the bacterium Treponema Pallidum. It has often been called "the great imitator" because so many of the signs and symptoms are indistinguishable from those of other diseases.
LGV A55 (099.1) Lymphogranuloma Venereum Lymphogranuloma Venereum (LGV) is a systemic, sexually transmitted disease (STD) caused by a type of Chlamydia Trachomatis (serovars L1, L2, or L3) that rarely occurs in the United States and other industrialized countries. However, recent outbreaks of LGV proctitis have been reported among men who have sex with men (MSM).

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