title: [Status and trend for sodium content of Chinese per-packaged foods].
abstract: OBJECTIVE
  To collect the data on the sodium content of Chinese per-packaged foods, and to analyze the variation trend of sodium content.
  
  
  METHODS
  1279 data on the sodium content of per-packaged foods in all were recorded and analyzed through the investigation of per-packaged food nutrition labels, and were categorized into 31 varieties. Median sodium content and variation were calculated for each variety and compared with 2004 sodium content data on China Food Composition.
  
  
  RESULTS
  There are 6 per-packaged foods varieties has the median sodium content more than 500 mg/100 g. The food varieties with the highest mean sodium content were ready-to-eat food(2500 mg/100 g), followed by instant noodles (1900 mg/100 g). Compared with 1991 -2004 per-packaged foods sodium content, 13 varieties had medium sodium content that increased, and 5 varieties increased significantly, such as cake, liquid milk, instant noodles etc.
  
  
  CONCLUSIONS
  The survey show that sodium content of some per-packaged food increased.
authors.forename: Xuesong
authors.initials: X
authors.lastname: Zhang
authors.forename: Zhu
authors.initials: Z
authors.lastname: Wang
authors.forename: Mei
authors.initials: M
authors.lastname: He
authors.forename: Jianhua
authors.initials: J
authors.lastname: Men
authors.forename: Jingming
authors.initials: J
authors.lastname: Yang
authors.forename: Xiang
authors.initials: X
authors.lastname: Shen
authors.forename: Ying
authors.initials: Y
authors.lastname: Lu
authors.forename: Yuexin
authors.initials: Y
authors.lastname: Yang
mesh_terms: D002681:China; D003625:Data Collection; D016208:Databases, Factual; D005502:Food; D005511:Food Handling; D005515:Food Labeling; D012964:Sodium / Q000032:analysis*; D012982:Sodium, Dietary
chemical_list: D012982:Sodium, Dietary; D012964:Sodium