National Occupational Respiratory Mortality System
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The National Occupational Respiratory Mortality System (NORMS) is a
data-storage and interactive data-retrieval system developed
and maintained by NIOSH.
The National Surveillance System for Pneumoconiosis Mortality (NSSPM),
the precursor to NORMS, is now one of its components.
NORMS is a compilation of national mortality data obtained
annually (since 1968, unless otherwise indicated) from the
National Center for Health Statistics (NCHS)
records for the following respiratory conditions:
Hypersensitivity Pneumonitis (since 1979)
Malignant Mesothelioma (since 1999)
- Malignant Mesothelioma of Pleura
- Malignant Mesothelioma of Peritoneum
- Malignant Mesothelioma of Other Sites
- Malignant Mesothelioma, Unspecified Sites
- Byssinosis (since 1979)
- Coal Workers’ Pneumoconiosis
- Other Pneumoconiosis
- Unspecified Pneumoconiosis
Industry-specific and occupation-specific mortality data, for both the former and the following lists of respiratory conditions, have been compiled annually (1985-1999,
unless otherwise indicated) for a
selected list of states (and years) for which industry and occupation coding from death certificates met NCHS quality criteria:
Deaths from these conditions are defined on the basis of
International Classification of Diseases
(ICD) coding categories. NORMS compiles mortality data for the total number of U.S. residents identified with
any of the previously mentioned respiratory conditions listed on the
as well as for the subset of decedents where the respiratory condition is listed only as a
on the entity axis.
Additional information is available by age group
(0-14, 15-24, 25-34, 35-44, 45-54, 55-64, 65-74, 75-84, or 85 years and older), race (white, black, or other),
sex, and state and county of residence at the time of death.
The "National" database query will generate a variety of summary statistics
in the form of tables, charts, and maps. Examples of the types of
statistics that this application generates are
number of deaths
crude death rates
age-adjusted death rates
years of potential life lost
(YPLL) by year, age group, race, sex, or Hispanic origin
at the national, state, and county levels since 1968.
Data from additional sources, such as
are incorporated into the system. County-level tables can be obtained for one or all 50 states for certain
time intervals of 10 or more years; however, data for counties with less than three deaths
(or less than five deaths for rate data) are aggregated. Ideally,
should be applied to rates when analyzing trends over time intervals spanning more than one ICD revision.
The "Industry/Occupation" database query will generate tables
of the number of deaths or the YPLLs by
year, age group
(15-24, 25-34, 35-44, 45-54, 55-64, 65-74, 75-84, or 85 years and
older), race, sex, and Hispanic origin, but only for a
list of states (and years) for which industry and occupation coding from death certificates met NCHS
quality criteria between 1985 and 1999. Industries/Occupations with less than
three deaths are aggregated unless a specific industry and/or occupation is selected, or unless any sex, race,
or Hispanic-origin subgroups are selected.
Proportionate mortality ratios
(PMRs) are generated for industries and occupations with five or more deaths for certain time intervals of 10 or more years.
County-level queries of the Industry/Occupation database are precluded.