title: Secular trends of sudden infant death syndrome and other causes of post perinatal mortality in Norwegian birth cohorts 1967-1984.
abstract: Lack of positive diagnostic criteria and increasing professional concern, probably causing increasing ascertainment, have rendered reported increases in SIDS-rates controversial. However, these problems related to cause specific mortality do not apply to the total mortality. Due to the exceptional age-at-death distribution of SIDS cases, the SIDS fraction of all deaths increases during the first year of life to reach a maximum, in the present study of 56%, from the 105th through the 125th day of life. During these days, the total mortality rate in Norway increased from 0.24 per 1,000 in 1971-72 to 0.46 in 1983-84. Thus, the observed trend, with an increase in the SIDS rate from 1.02 per 1,000 in 1971-72 to 2.34 in 1983-84, is considered true. Observed in a country where perinatal and neonatal mortality have decreased for a long period of time and still remain very low in a global perspective, the increasing SIDS rate is a matter of great concern.
authors.affiliation: Medical Birth Registry of Norway, Bergen.
authors.forename: L M
authors.initials: LM
authors.lastname: Irgens
authors.forename: R
authors.initials: R
authors.lastname: Skjaerven
authors.forename: R T
authors.initials: RT
authors.lastname: Lie
mesh_terms: D001724:Birth Weight; D005260:Female; D006801:Humans; D007223:Infant; D007226:Infant Mortality / Q000639:trends*; D007231:Infant, Newborn; D008423:Maternal Age; D009664:Norway; D010298:Parity; D013398:Sudden Infant Death / Q000453:epidemiology*