About SCAN Cancer module
The purpose of the SCAN Cancer module is to generate interactive statistical output
(tables, trend-lines, bar-charts, county, zip code, and regional maps) of cancer
incidence and mortality data. The intended audience is researchers, public health
officials, students, and the general public. Cancer data comes from SC Central Cancer
Registry (SCCCR). The SCCCR is a population-based data system that collects cancer
incidence (newly diagnosed cases) in South Carolina. Data in a central cancer registry
are used to study trends in how often cancers occur in a defined area, changes in
diagnosis and treatment patterns, and patients' survival rates. Data from the SCCCR
are submitted to the North American Association of Central Cancer Registries (NAACCR)
for an evaluation of completeness, accuracy, and timeliness each year since a formal
certification process was established in 1997. In each year (1997, 1998, 1999, 2000,
2001, 2002, 2003), the SCCCR has received NAACCR certification. Information on cancer
mortality (deaths) is collected by the Division of Vital Records and published by
the Division of Biostatistics within DHEC.
This module also serves as a compliment to the 30-40 cluster investigations the
registry carry out in a year and the statistical services offered by the registry.
Please refer to the
SCCCR homepage for more detailed information.
Depending on the types of the information required, users can select from four different
caner modules: Cancer Incidence Statistical Module, Cancer Incidence Full or Research
Module, Childhood Cancer Incidence Module and Cancer Mortality Module.
Cancer Incidence Modules
Three distinct modules all related to cancer incidence. These are new cases of cancer
that are reported to the South Carolina Central Cancer Registry (SCCCR).
Cancer Incidence: Statistical File
These are new invasive cases of cancer that are reported to the South Carolina Central
Cancer Registry (SCCCR). This module does not contain In Situ cases of cancer except
for bladder. Statistics produced are comparable to nationally published reports.
Cancer Incidence: Full (Research) File
This module contains both in situ and invasive cases of cancer that have occurred
to South Carolina residents. The primary difference between this and the statistical
file is the inclusion of in situ cancers. Statistics produced may not be comparable
to nationally published reports.
Childhood Cancer Incidence File
This module contains all the new cancer cases occurring children ages 0-19. The
primary difference between this and the statistical and research files is the difference
in the code of the specific cancers. This module does not contain In Situ cases
of cancer except for bladder.
Cancer Mortality Module
This module contains all the cancer related deaths that have occurred to South Carolina
residents. This module is only concerned with death caused by cancer. The coding
is the same however there are slight modifications to the underlying population
denominator as to match national statistics.
Users can filter the data by demographic characteristics such as year, race, age
and sex. Cancer stage and grade can also be selected for the incidence modules.
To provide more flexibility, these variables can be selected individually or jointly
from the multiple-selection windows provided so that the output includes a highly
customizable two-way table with the statistics users requested. User can opt to
obtain statistics of multiple cancer types at the same time by selecting different
types of cancer from the available primary cancer types window, which can be sorted
alphabetically or by cancer groups.
As with the other SCAN modules, users can selected different geographic units of
analysis such as by zip codes, counties and DHEC Regions. The geographic location
of each case is obtained through an advanced geocoding process based on the actual
residence address instead of the reported geography (e.g. zip code & county).
For more information, please refer to the Geocoding section.
Statistical and graphical output options include crude/age-adjusted rates, 95% confidence
interval, trend-lines and bar charts to better accommodate the varied needs of SCAN
The interactive mapping options in the SCAN cancer module have similar user input
options. Like the other SCAN modules, Geographic Information System (GIS) is used
to provide general spatial analysis capabilities and visual presentation of information.
GIS provides SCAN with an illustrative media to distribute information via interactive
maps. Interactive maps allow users to easily assess cancer statistics for any location
in South Carolina. SCAN maps also allow the user to overlay other information, such
as census data and health infrastructure, onto the map for additional analysis.
Suppression rules that SCCCR uses for its other publications are implemented on
the public version of the cancer module. Users who need non-masked statistics need
to contact the Registry to determine the most appropriate way to obtain the requested
- Cells including counts of 1-4 be reported as <5.
- Cells including counts of 5-10 be reported as 10.
- Cells including counts of 10 or more should not be suppressed.
- Zero cells be reported as 0.
- Rates associated with frequencies of 15 cases or fewer be suppressed.
The SCCCR and PHSIS Biostatistics Division and Division of Public Health Informatics
rewrote their geocoding procedures for SCCCR data in 2006 in order to streamline
the process and to make sure the process was fully documented. All geocoding of
DHEC public health data are done internally using the SC DHEC Composite Web Geocoding
Service. The new procedures are all automated with no subjective decisions made
by staff, which allows geocoding to be replicated year after year with the assurance
that consistent methods will be applied. Based on this new method first utilized
in 2006, over 96% of SCCCR geocoded data are matched, with a high degree of accuracy,
to a minimum geographic scale at the zip code level. The majority of the cases are
matched to an exact address.