title: Preterm birth in Sweden: what are the average lengths of hospital stay and the associated inpatient costs?
abstract: OBJECTIVE
  To provide estimates of the first-year length of stay and inpatient costs of Swedish infants admitted for neonatal care by week of gestation and by birthweight; and to provide estimates of the length of stay and inpatient costs of delivering mothers during the ante- and postpartum period by week of gestation and birthweight of the infant.
  
  
  METHODS
  Population-based registry study covering all live singleton deliveries in Sweden between 1998 and 2001 (n=336 136). First-year hospitalizations of infants admitted for neonatal care 0-6 d after birth (n=24 583) were tracked, as were hospitalizations of mothers for whom the date of admission lay+/-1 mo from the date of delivery. Monetary values were assigned to each hospitalization using the Nord-DRG classification system.
  
  
  RESULTS
  On average, preterm infants (GA < 37 wk) had first-year lengths of stay roughly four times as long as full-term infants admitted for neonatal care (30 d vs 8 d, p<0.0001). The average first-year length of stay of the extremely immature infants (GA 22-25 wk) was more than six times as long that of infants born at 34-36 wk (108 d vs 17 d, p<0.0001). Mothers delivering preterm had an average length of stay slightly more than twice as long (p<0.0001) as that of mothers of full-term infants during the ante- and postpartum period.
  
  
  CONCLUSIONS
  The estimated lengths of stay and costs may serve as reference values for a Swedish setting.
authors.affiliation: Stockholm Health Economics, Stockholm, Sweden. anna.r@healtheconomics.se
authors.forename: Anna
authors.initials: A
authors.lastname: Ringborg
authors.forename: Jenny
authors.initials: J
authors.lastname: Berg
authors.forename: Mikael
authors.initials: M
authors.lastname: Norman
authors.forename: Magnus
authors.initials: M
authors.lastname: Westgren
authors.forename: Bengt
authors.initials: B
authors.lastname: Jönsson
mesh_terms: D006760:Hospitalization / Q000191:economics* / Q000706:statistics & numerical data; D006801:Humans; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D007234:Infant, Premature; D007902:Length of Stay; D012016:Reference Values; D012042:Registries; D013548:Sweden