Neurology · 2005
Temporal and geographic variation in United States motor neuron disease mortality, 1969-1998.
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Noonan Curtis W, White Mary C, Thurman David, Wong Lee-Yang
Аннотация
OBJECTIVE: To describe temporal trends of motor neuron disease (MND) mortality in the United States. Variations in MND by demographic variables of sex, age, geography, and race/ethnicity were evaluated to assess the possible explanations for observed trends.
METHODS: Multiple-cause mortality files from the National Center for Health Statistics for the years 1969 through 1998 were searched for all United States death records with codes corresponding to MND. Age-adjusted mortality rates were calculated by sex, race/ethnicity, age, birth cohort, and place of death.
RESULTS: Overall MND mortality rates increased from 1.25 per 100,000 to 1.82 per 100,000, representing a 46% increase during the 30-year period. Rates among women increased by 60% and continue to rise. Rates among men rose by 35% during this period but have leveled off in the most recent decade evaluated. Mortality rates among African Americans and Hispanics were approximately 50% lower than rates among non-Hispanic whites. A southeast to northwest gradient was observed when rates were grouped by 12 geographic areas. MND mortality rates per 100,000 (and 95% CI) ranged from 2.22 (1.89 to 2.55) in the Northwest to 1.57 (1.44 to 1.71) in the Southeast.
CONCLUSIONS: Variations in motor neuron disease (MND) mortality by time, race/ethnicity, sex, and geography were consistent with the hypothesis that environmental exposures, combined with factors of genetic susceptibility, play a role in the development of MND.
METHODS: Multiple-cause mortality files from the National Center for Health Statistics for the years 1969 through 1998 were searched for all United States death records with codes corresponding to MND. Age-adjusted mortality rates were calculated by sex, race/ethnicity, age, birth cohort, and place of death.
RESULTS: Overall MND mortality rates increased from 1.25 per 100,000 to 1.82 per 100,000, representing a 46% increase during the 30-year period. Rates among women increased by 60% and continue to rise. Rates among men rose by 35% during this period but have leveled off in the most recent decade evaluated. Mortality rates among African Americans and Hispanics were approximately 50% lower than rates among non-Hispanic whites. A southeast to northwest gradient was observed when rates were grouped by 12 geographic areas. MND mortality rates per 100,000 (and 95% CI) ranged from 2.22 (1.89 to 2.55) in the Northwest to 1.57 (1.44 to 1.71) in the Southeast.
CONCLUSIONS: Variations in motor neuron disease (MND) mortality by time, race/ethnicity, sex, and geography were consistent with the hypothesis that environmental exposures, combined with factors of genetic susceptibility, play a role in the development of MND.