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Objective To identify the dietary patts in urban school-aged children in China and determine the relations with socio-demographic or lifestyle factors.MethodsA total of 620 school-aged children from 7 cities in China were recruited in a cross-sectional study and their dietary data over the preceding 6 months were recorded via questionnaire between 2011-2012. The dietary patts were identified using principal components analysis. Mann-Whitney U or Kruskal-Walis H test was preformed to reveal the relationship between dietary patts and socio-demographic or lifestyle characteristics. Results Three major dietary patts were identified. The traditional patt had high positive relationships with grains, potatoes, vegetables, fruits, vegetables and soybeans/soybean products. The high-protein patt was characterized by large positive coefficient for fruits, fish/shrimps, eggs, milk/milk products, soybeans/soybean products and salt. The oil/fat and beverage patt with highly related with grains, meat/poultry, eggs, oil/fat, salt and beverages. The relationships between the dietary patts and various socio-demographic or lifestyle characteristics were analyzed.Conclusion Three dietary patts were identified. A clear association was found between the dietary patts and socio-demographic or lifestyle characteristics.