Perinatal and infant mortality in a north Swedish population, 1875-1975.

Trends in infant and perinatal mortality in Sweden over the period 1875 to 1975 are analyzed. The study is based on data from three parish registers in northern Sweden. The data are presented for four 25-year periods for five categories of survival: less than 1 day, 2-7 days, 8-28 days, 1-6 months, and 7-12 months. "The main question was whether and to what extent the specific general characteristics of this population influenced the general infant mortality statistics in the area."