Texas Health Data
Death Tables (1999 - 2011)
Death Tables(1990 - 1998)
Death Maps(1990 - 1998)
Death data are based on a subset of variables
collected on the Texas Certificate of Death. Death data are available
in two modules, one for the years 1990 through 1998 and one for the years
1999 through 2011. Two modules are necessary for death statistics
because deaths occurring during 1990 through 1998 were coded using ICD-9
while deaths occurring since 1999 are coded using ICD-10.
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Changes in Cause of Death Coding for
1999 and later - for years prior to 1999, cause of death was coded
according the Ninth Revision of the International Classification
of Diseases (ICD-9). The Tenth Revision (ICD-10) was implemented
for years 1999 and onward. ICD-10 represents a substantial change
from the ICD-9. The number of disease categories has expanded from
ICD-9 and category names, coding rules and standard tabulation lists have
changed such that there is no direct mapping from one system to the other.
NCHS is developing methods to facilitate comparisons between death statistics
coded under ICD-9 and those coded under ICD-10 (comparability ratios).
For the present, Texas Health Data provides mortality statistics for years
1999 and onward in a separate module. The user is cautioned against
attempting analyses that involve combining or comparing data produced under
the two different coding systems (see below for more information on comparisons
between the two coding systems).
Cause of Death Selections - The
choices for the cause of death available for both the ICD-9 and the ICD-10
systems are divided into three levels that are based on predefined lists
developed by NCHS for the tabulation and dissemination of data. For
years 1999 and onward, the causes of death listed on the input screen comprise
the first level and are the categories used to determine the leading causes
of death. The second level is more detailed and is based on the NCHS
List of 113 Selected Causes of Death. The third level is a
modified version of the NCHS List of 358 Selected Causes of Death.
In order to obtain information from the more detailed second or third
levels, the user must first select the broader category in the first level
and then “drill down” to the second level and third level. In some
cases, the level of detail does not change from the first level to the
third level. In other cases the level of detail does not change from level
one to level two but is more detailed in level three. A detailed
searchable list of the three levels of data based
on ICD-10 provides more information on the drill-downs.
For pre-1999 statistics, the drill-down
lists are also based on modified NCHS tabulations, but with less
Comparability Ratios - NCHS
has developed comparability ratios to support comparisons between ICD-9
and ICD-10. Comparability ratios were derived by double-coding 1996
deaths using both systems and calculating the ratio of the number of deaths
based on ICD-10 to the number based on ICD-9, for each specific cause.
This analysis was carried out for the NCHS list of 113 causes of death.
The data used were at the national level and did not take into account
differences due to age, race or geography. More detailed comparability
ratios are currently under development that do reflect the effect of age,
race and geography. A report comparing the coding systems and providing
comparability ratios is provided at http://www.cdc.gov/nchs/data/nvsr/nvsr49/nvsr49_02.pdf
Age Adjustment - age adjusted
death rates provide unbiased comparisons that are not influenced by differences
in age distribution in subject populations. The standard used
is the US 2000 standard population. More information on age adjusting
is available at http://www.cdc.gov/nchs/data/statnt/statnt06rv.pdf
and on the choice of standard population at http://www.cdc.gov/nchs/data/statnt/statnt20.pdf
Note: Age adjusted rates retrieved from this system after December 8,
2008 will be slightly different from those retrieved previously, because of
a change in methodology. The differences will be small.
- New Death Certificate for 2006 -
beginning in 2006, a new Certificate of Death Form is being used in Texas.
Data users are cautioned that some data items might not be directly
comparable with previous years.
Last Updated March 30th, 2014