title: Age and parity influences on maternal mortality: United States, 1919-1969.
abstract: Comparisons of crude and standardized rates of maternal mortality show that changes in age and parity distributions of births had some influence on maternal mortality trends for the years 1919-1969 in the United States. Changes in the age and parity distributions of births for cohorts of U.S. women also influenced crude cohort maternal mortality rates to some extent.
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D049673:History, 20th Century; D006801:Humans; D008423:Maternal Age; D008428:Maternal Mortality; D008875:Middle Aged; D010298:Parity; D013223:Statistics as Topic; D014481:United States