Diagnosis andProcedureCodesUsed to
Analyze theHospital DischargeData
Diagnostic groupings and code numbers used in Chapter
4 and Chapter 7 are based on the International
Classification of Diseases, 9th Revision, Clinical
Modification (ICD-9-CM).
The tabulations of the hospital inpatient data by first-
listed diagnosis and all-listed procedures utilize the
diagnostic categories available respectively at
and
.
The ICD-9-CM diagnostic categories used to identify
specific mental disorders are available online at
12.xls
TermsRelated toMortality
The most common, and perhaps the most valuable,
measure of the likelihood (or risk) of death in the
specified population during a particular time is the
crude
death rate
. It is computed as the number of deaths per
1,000 or 100,000 population.
Age-adjusted mortality rates
- Because mortality
frommost causes of death occurs predominately among
the elderly, a population group with a larger proportion of
older persons would have a higher mortality rate. The
"age-adjustment" removes the effect of the age
differences among sub-populations (or in the same
population over time) by placing them all in a population
with a standard age distribution. All age-adjusted
mortality rates in this report were computed by the direct
method, that is by weighting the age-specific rates for a
given year by the age distribution of a standard
population. The weighted age-specific rates are then
added to produce the summary rate for all ages
combined. Beginning with the 2000 data year, a new
population standard for the age adjustment of mortality
rates has replaced the standard based on the 1940
population and used since 1943. The new standard uses
the age composition of the 2000 U.S. projected
population. The standard is expressed in terms of a
?standard million?: the relative distribution of the 2000
population of the United States totaling 1 million in 10-
year age groups:
Age
group
2013
population
2013
deaths
Age-specific
rates
in2013
2000
standard
Age-
adjusted
rate for
2013
A
B
C
D
E
F
(C/B)*100000
D*E
<1
89,196
447
501.1 .013818
6.9
1-4
351,077
131
37.3 .055317
2.1
5-14
924,150
121
13.1 .145565
1.9
15-24
937,362
663
70.7 .138646
9.8
25-34
868,888
1,081
124.4 .135573
16.9
35-44
834,554
1,585
189.9 .162613
30.9
45-54
834,992
3,418
409.3 .134834
55.2
55-64
759,706
6,480
853.0 .087247
74.4
65-74
566,812
9,091
1603.9 .066037
105.9
75-84
301,956 12,091
4004.2 .044842
179.6
85+
112,360 14,801
13172.8 .015508
204.3
All ages
6,581,054 49,929
TOTAL
?=687.8
The age-adjusted mortality rates should be viewed as
relative indexes rather than as actual measures of
mortality risk. It is also important to note that age-
adjusted rates can only be compared to other age-
adjusted rates that use the same population standard.
In this report, all age-adjusted mortality rates are based
on the 2000 standard, and they CANNOT BE compared to
rates using the 1940 standard population.
Age-specific mortality
- Number of deaths in a
specific age group during a calendar year.
Alcohol-induced deaths
? This category was
expanded in 2003. Causes of death attributable to alcohol
mortality include mental and behavioral disorders due to
alcohol use, degeneration of nervous system due to
alcohol use, alcoholic polyneuropathy, alcoholic
cardiomyopathy, alcoholic gastritis, alcoholic liver
disease, finding of alcohol in blood, accidental poisoning
by and exposure to alcohol, intentional self-poisoning by
alcohol, poisoning by alcohol, undetermined intent.
Cause of death
- For the purpose of national
mortality statistics, every death is attributed to one
underlying condition, based on information reported on
the death certificate and utilizing the international rules
for selecting the underlying cause of death from the
reported conditions.
Cause-specific mortality
- Number of deaths from
a specified cause during a calendar year.
Classification of causes of death
- The cause of
death used in this report is the underlying cause
classified according to the
International Classification of
Diseases (ICD).
Beginning with the 2000 data year in
Arizona (1999 nationally), a new revision of the
International Classification of Diseases was implemented.
The Tenth Revision (ICD-10) has replaced the Ninth
Revision (ICD-9), whichwas in effect since 1979.
Comparability ratios
- Comparability ratios are
measures of comparison between ICD-9 and ICD-10. Any
comparison of causes of mortality in Arizona before and
after the implementation of ICD-10 needs to take into
account the changes in statistical trends that can be
attributed to changes in the classification system alone.
Comparability ratio of 1.0 indicates that the same
number of deaths would be assigned to a cause-of-death
when ICD-9 or ICD-10 was used. Comparability-modified
number of deaths and mortality rates are shown for the
four causes of death for which the discontinuity in trend
is substantial (influenza and pneumonia, Alzheimer?s
disease, nephritis, or septicemia).
Drug-induced deaths
? This category was
expanded in 2003. Causes of death attributable to drug-
related mortality include mental and behavioral disorders
due to psychoactive substance use, accidental poisoning
by and exposure to drugs, suicide by drugs, homicide by
drugs and poisoning by drugs, undetermined intent
Firearmmortality
? Causes of death attributable to
firearmmortality include accidental discharge of firearms,
suicide by firearms, homicide by firearms, legal
intervention involving discharge of firearms, terrorism
involving firearms and discharge of firearms,
undetermined intent.
Arizona Health Status and Vital Statistics 2013
447
