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Newly Identified Confirmed Chronic Hepatitis C Age 15-34 Year 2007-2016 Health

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Newly Identified Confirmed Chronic Hepatitis C Age 15-34 Year 2007-2016 Health

This data set provides an estimate of the number of people aged 15-34 years with newly identified confirmed chronic (or past/present) hepatitis C infection, by county and by year.

The dataset is limited to persons aged 15 to 34 because hepatitis C infection is usually asymptomatic for decades after infection occurs. Cases are usually identified because they have finally become symptomatic, or they were screened. Until very recently, screening for hepatitis C was not routinely performed. This makes it very challenging to identify persons with recent infection. Limiting the age of newly identified patients to 15-34 years makes it more likely that the cases included in the dashboard were infected fairly recently. It is not meant to imply that the opioid crisis’ effect on hepatitis C transmission is limited to younger people.

The process by which case counts are determined is as follows: Case reports, which include lab test results and address data, are sent to Pennsylvania’s electronic disease surveillance system (PA-NEDSS). Confirmation status is determined by public health investigators who evaluate test results against the CDC case definition for hepatitis C in place for the year in which the patient was first reported (https://wwwn.cdc.gov/nndss/conditions/hepatitis-c-chronic/). Reportable disease data, including hepatitis C, is extracted from PA-NEDSS, combined with similar data sent by the Philadelphia Department of Public Health (PDPH, which uses a separate surveillance system), and sent to CDC. Case data sent to CDC (from PA-NEDSS and PDPH combined) are used to create a statewide reportable disease dataset. This statewide file was used to generate the dashboard dataset.

Note that the term that CDC has used to denote persons with hepatitis C infection that is not known to be acute has switched back and forth between “Hepatitis C, past or present” and “Hepatitis C, chronic” over the past several years. The CDC case definition for hepatitis C, chronic (or past or present) changed in 2005, 2010, 2011, 2012, and 2016. Persons reported as confirmed in one year may not have been considered confirmed in another year. For example, patients with a positive radioimmunoblot assay (RIBA) or elevated enzyme immunoassay (EIA) signal-to-cutoff level were counted as confirmed in 2012, but not counted as confirmed in 2016.

Data sent to CDC’s National Notifiable Disease Surveillance System use a measure for aggregating cases by year called the MMWR year. The MMWR, or the Morbidity and Mortality Weekly Report, is an official publication by CDC and the means by which CDC has historically presented aggregated case count data. Since data in the MMWR are presented by week, the MMWR year always starts on the Sunday closest to Jan 1 and ends on the Saturday closest to Dec 31. The most recent year for which case counts are finalized is 2016. Annual case counts are finalized in May of the following year.

The patient zip code, as submitted to PA-NEDSS, is used to determine the case’s county of residence at the time of initial case report. In some instances, the patient zip code is unavailable. In those circumstances, the zip code of the provider that ordered the lab test is used as a proxy for patient zip code.

Users should note that the state prison system routinely screens all incoming inmates for hepatitis C. If these inmates are determined to be confirmed cases, they are assigned to the county in which they were incarcerated when their confirmed hepatitis C was first identified. Hepatitis C case counts in counties with state prisons should be interpreted cautiously in light of this enhanced screening activity.

Columns

NameSocrata field nameColumn name in sgr mountData typeDescription
Latitude/Longitude (city)location_1_citylocation_1_cityText
County Codecounty_codecounty_codeTextA 2-digit code indicating county within Pennsylvania, which is the same as County Code Number but with leading zeroes and stored as text.
Latitude/Longitudelocation_1location_1PointThe latitude and longitude of the county centoid in degrees, separated by a comma and enclosed in parentheses. Providing a point for a county to be used when creating mapping visuals.
County FIPS Codecounty_fips_codecounty_fips_codeTextThe FIPS county code is a five-digit Federal Information Processing Standard (FIPS) code (FIPS 6-4) which uniquely identifies counties and county equivalents in the United States, certain U.S. possessions, and certain freely associated states. This is the 3-digit part of the 5-digit county FIPS code specifically standing for the county.
County Code Numbercounty_code_numbercounty_code_numberNumberInteger ranging from 1 to 67 indicating the Pennsylvania county when ordered alphabetically.
County Namecounty_namecounty_nameTextCounty of residence at time of initial case report. Case reports, which include lab test results and address data, are sent to Pennsylvania’s electronic disease surveillance system (PA-NEDSS). Patient zip code is used to determine county of residence at time of initial case report.
Hepatitis Count Descriptionhepatitis_count_descriptionhepatitis_count_descriptionTextProvides a definition for what the Count column represents. If the count column has a null field, then this column provides the reason for the null.
State FIPS Codestate_fips_codestate_fips_codeTextThese are the first 2 digits of the 5-digit Federal Information Processing Standard (FIPS) code that designate the State association. Each State has its own 2-digit number and each County within the state has its own 3-digit number which are combined into a 5-digit number to uniquely identify every US county. For more technical details : Federal Information Processing Standards Publications (FIPS PUBS) are issued by the National Institute of Standards and Technology (NIST) after approval by the Secretary of Commerce pursuant to Section 111 (d) of the Federal Property and Administrative Services Act of 1949 as amended by the Computer Security Act of 1987, Public Law 100-235. Federal Information Processing Standard (FIPS) 6-4, Counties and Equivalent Entities of the U.S., Its Possessions, and Associated Areas -- 90 Aug 31 , provides the names and codes that represent the counties and other entities treated as equivalent legal and/or statistical subdivisions of the 50 States, the District of Columbia, and the possessions and freely associated areas of the United States. Counties are considered to be the "first-order subdivisions" of each State and statistically equivalent entity, regardless of their local designations (county, parish, borough, etc.). Information gathered from census data - https://www.census.gov/geo/reference/codes/cou.html
Latitude/Longitude (address)location_1_addresslocation_1_addressText
Latitude/Longitude (zip)location_1_ziplocation_1_zipText
Latitude/Longitude (state)location_1_statelocation_1_stateText
Municipality Boundary:@computed_region_amqz_jbr4:@computed_region_amqz_jbr4Number
Pa School Districts (2017):@computed_region_rayf_jjgk:@computed_region_rayf_jjgkNumber
Pa House Districts (2017-01):@computed_region_r6rf_p9et:@computed_region_r6rf_p9etNumber
Pennsylvania County Boundaries:@computed_region_nmsq_hqvv:@computed_region_nmsq_hqvvNumber
Pa Senatorial Districts (2017-01):@computed_region_d3gw_znnf:@computed_region_d3gw_znnfNumber
YearyearyearTextThe Year field is actually the MMWR year in which the case was first reported to PADOH. MMWR years are similar to calendar year, but MMWR years always start on the Sunday closest to Jan 1 and end on the Saturday closest to Dec 31. MMWR Year is used by CDC to aggregate case counts in the National Notifiable Disease Surveillance System. The most recent year for which case counts are finalized is 2016.
Hepatitis C countshcvcountshcvcountsNumberNumber of newly identified confirmed cases of hepatitis C (past or present, or chronic) in persons aged 15-34 in the specified county and year. Case counts of 0-4 are suppressed and replaced with “ND”. Confirmation status was determined by public health investigators who would evaluate test results against the CDC case definition for hepatitis C for that MMWR year (https://wwwn.cdc.gov/nndss/conditions/hepatitis-c-chronic/).

Upstream Metadata