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• W97393693 abstract "This article analyzes infant mortality according to maternal age and parity in Chile in 1969, 1974, and 1979, 3 years in a period of marked decline in infant mortality rates. Since 1952 the Naitonal Health Service has been responsible for preventive health care for the entire population and for curative services for 70%. Between 1954-79, the National Health Service continued established programs of maternal and child health care and added provision of reversible contraceptives to women requesting them. Birthrates, infant mortality rates, neonatal mortality rates, and rates of late infant mortality in 1954 and 1979 respectively were 34.9 and 22.1; 120.7 and 36.6; 41.0 and 18.3; and 79.7 and 18.3. The close relationship between the fertility decline and infant mortality decline since 1964 was not due to chance. In the 10 years preceding the family planning program, neonatal mortality declined by only 41.8%, while in the ensuing 16 years it declined by 49.1%. Late infant mortality fell 19.2% in the 10 years before the program and 68.5% afterwards, achieving nearly the level of neonatal mortality. Data from birth certificates and infant death certificates were used to assess the characteristics of the infant mortality decline more closely. A decline in infant mortality rates was observed for all maternal age groups between 1969-79, but was more marked in the 20-24, 25-29, and 30-34 cohorts than in others. The number of births to mothers under 20 and 20-24 years old increased slightly between 1969-79. In 1974, mortality rates of infants 0-28 days old and 29 days-11 months old were 28.3 and 41.2 for all mothers, 33.5 and 54.0 for mothers under 20, 25.5 and 38.3 for mothers 20-34, and 38.3 and 40.9 for mothers 35 and over, respectively. Corresponding rates for 1979 were 20.0 and 20.1 for all mothers, 24.2 and 30.3 for mothers under 20, 18.2 and 17.5 for mothers 20-34, and 26.5 and 22.7 for mothers over 35. In both 1974 and 1979, rates of neonatal mortality and later infant mortality and of 4th and subsequent births, were significantly higher among mothers under 20 in rural areas than in urban areas, and in lower than in higher socioeconomic groups. Birth order is clearly related to infant mortality rates; the rise in the time periods with parity was relatively slight for birth orders 1-3 and began to increase more rapidly after birth order 4. In the 3 years considered and in all maternal age cohorts, infant mortality rates increase with birth order, and the tendency is especially marked in mothers under 20 and over 40. Grand multiparity appears to be more significantly related than maternal age to infant mortality in mothers over 20 years old." @default.
• W97393693 created "2016-06-24" @default.
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• W97393693 date "1982-01-01" @default.
• W97393693 modified "2023-09-26" @default.
• W97393693 title "[Relation of infant mortality to maternal age and birth order. Chile, 1969 - 1974 - 1979]." @default.
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