Impact of Changing Age and Parity Distributions of Mothers on Perinatal Mortality in Sweden, 1953–1975

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Abstract
Meink 0 [Department of Social Medicine, University Hospital, S—750 14 Uppsala, Sweden], Smedby B and Ericson. A. Impact of changing age and parity distributions of mothers on perinatal mortality in Sweden, 1953–1975. International Journal of Epidemiology 1979, 8: 361–364. A study was made on how the shift in the age and parity distribution of mothers affected the perinatal mortality in Sweden between 1953–55 and 1973–75. During these years the overall perinatal mortality rate fell from 29 to 13 per 1 000 births. The authors used the specific perinatal mortality rates by the mother'age and infant's birth order in 1973–75 to calculate what the overall perinatal mortality rate would have been with the age and parity distributions of mothers in 1953–55 and 1963–65. They conclude that only 1.4 of the 16 per 1 000 decline in perinatal mortality could be attributed to the shift in the mother's age and parity distribution.

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