title: [Analysis of dietary iron intakes of pregnant and lactating women based on food composition databases from China and US].
abstract: OBJECTIVE
  To evaluate the difference between estimations on dietary iron intake based on the China and US food composition databases.
  
  
  METHODS
  Total 368 records of 24-h dietary recall on mid-term pregnant women and lactating rural women were analyzed for their iron intakes with the China Food Composition Table 2002 and the USDA National Nutrient Database for Standard Reference release 25, respectively. The values of dietary iron intake derived from two composition databases were compared statistically.
  
  
  RESULTS
  The dietary iron intakes of total 368 dietary records estimated with China and US databases were (24.37 +/- 9.66) mg and (16.20 +/- 9.13) mg respectively (with paired t test, t = 20.081, P < 0.01, correlation coefficient r = 0.657, P < 0.01), with average ratio of 1.69 +/- 0.55 between China and US values. In terms of food classification, the most significant differences were with dairy products, fishes, fruits, meats and cereals, with ratios of (10.66 +/- 2.24), (5.10 +/- 5.51), (3.01 +/- 2.26), (3.01 +/- 7.85) and (2.33 +/- 0.77), respectively. Only iron intake values from tuberous crops and soy products had inverse ratio as (0.83 +/- 0.50) and (0.75 +/- 0.53).
  
  
  CONCLUSIONS
  The averaged dietary iron intake value for total records was very close to the reported national levels when estimated with the China Food Composition Table 2002, but much decreased when estimated with US food composition database with values as only approximately 66% of reported levels.
authors.forename: Tingting
authors.initials: T
authors.lastname: Jiang
authors.forename: Zhixu
authors.initials: Z
authors.lastname: Wang
authors.forename: Chenglin
authors.initials: C
authors.lastname: Song
authors.forename: Man
authors.initials: M
authors.lastname: Zhang
authors.forename: Xiaocheng
authors.initials: X
authors.lastname: Li
mesh_terms: D002681:China; D003611:Dairy Products; D004032:Diet; D015930:Diet Records; D005260:Female; D005638:Fruit; D006801:Humans; D007501:Iron; D019266:Iron, Dietary; D007774:Lactation; D009752:Nutritional Status; D011247:Pregnancy / Q000502:physiology*; D012424:Rural Population; D014481:United States
chemical_list: D019266:Iron, Dietary; D007501:Iron