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Secular trends of sudden infant death syndrome in Norway 1967–1988: application of a method of case identification to Norwegian registry data
Author(s) -
Oyen Nina,
Irgens Lorentz M.,
Skjærven Rolv,
Morild Inge,
Markestad Trond,
Rognum Torleiv Ole
Publication year - 1994
Publication title -
paediatric and perinatal epidemiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.667
H-Index - 88
eISSN - 1365-3016
pISSN - 0269-5022
DOI - 10.1111/j.1365-3016.1994.tb00460.x
Subject(s) - medicine , norwegian , identification (biology) , pediatrics , medical emergency , demography , botany , biology , philosophy , linguistics , sociology
Summary. In Norway, towards the end of the 1980s, sudden infant death syndrome (SIDS) was the most frequent cause of infant death. Both SIDS and the total post‐perinatal mortality rates had increased. This paper presents a procedure for identifying SIDS from death certificates. Supplemented with additional information, a database was established to evaluate secular trends of SIDS and for further analytical research. The Medical Birth Registry of Norway comprises 1.3 million births from 1967 to 1988. Of these, 5447 infants died in the post‐perinatal period. The cause of death was reviewed by an expert panel and 1984 cases of SIDS were retrieved. Low maternal age, higher birth order, male gender, and lower birthweight were confirmed as risk factors for SIDS. In 1988, the rate for SIDS and for total post‐perinatal deaths reached 2.69 and 5.02 per 1000 infants at risk. The incidence of SIDS increased 2.2 times from the period 1967–1971 to the period 1987–1988. Adjusted for maternal age, birth order, and birthweight, the odds ratio was 3.1. The increase is due to factors not yet accounted for. Adjusted mortality rates for the other post‐perinatal deaths were not different from the crude rates.