title: Sodium in the Finnish diet: II trends in dietary sodium intake and comparison between intake and 24-h excretion of sodium.
abstract: OBJECTIVE
  To estimate cross-sectional and long-term dietary sodium intakes and sources in Finland, and to evaluate the validity of 48-h recall to assess sodium intake.
  
  
  METHODS
  Cross-sectional dietary surveys and food availability data (Food Balance Sheets).
  
  
  METHODS
  Dietary surveys were carried out in Finland in 1992, 1997 and 2002. Food availability data were collected from 1980 to 1999.
  
  
  METHODS
  A stratified random sample was drawn from the population register. The total number of participants in the three dietary surveys was 6730. In the subsample for urine collection, the number of participants was 879.
  
  
  METHODS
  Nutrient intakes were estimated on the basis of a 3-day food diary in 1992, a 24-h recall in 1997 and a 48-h recall in 2002. The 24-h urinary excretion of sodium was used to validate sodium intake. In addition, salt intake was estimated based on Food Balance Sheets.
  
  
  RESULTS
  Sodium intake has slowly decreased since the early 1980s. Reported daily sodium intake correlated significantly with sodium excretion.
  
  
  CONCLUSIONS
  Sodium intake has decreased during the last two decades, but is still higher than the recommended daily intake. Sodium intake estimation based on dietary surveys and food availability data is a valid method provided that the food composition database is up to date and of good quality.
  
  
  BACKGROUND
  All surveys were funded by the National Public Health Institute in Finland and the Ministry of Social Affairs and Health.
authors.affiliation: Department of Epidemiology and Health Promotion, National Public Health Institute, Helsinki, Finland. heli.reinivuo@ktl.fi
authors.forename: H
authors.initials: H
authors.lastname: Reinivuo
authors.forename: L M
authors.initials: LM
authors.lastname: Valsta
authors.forename: T
authors.initials: T
authors.lastname: Laatikainen
authors.forename: J
authors.initials: J
authors.lastname: Tuomilehto
authors.forename: P
authors.initials: P
authors.lastname: Pietinen
mesh_terms: D000328:Adult; D003430:Cross-Sectional Studies; D016208:Databases, Factual / Q000592:standards; D004032:Diet / Q000639:trends; D004034:Diet Surveys; D005260:Female; D005387:Finland; D005504:Food Analysis; D006801:Humans; D008297:Male; D011939:Mental Recall; D008875:Middle Aged; D012307:Risk Factors; D012982:Sodium, Dietary / Q000008:administration & dosage* / Q000652:urine*; D016482:Urinalysis / Q000592:standards*
chemical_list: D012982:Sodium, Dietary