title: [Cross-sectional association between food rich in protein and pubertal development among children and adolescents in Chengdu City].
abstract: OBJECTIVE
  To explore the association between food rich in protein and puberty development among children and adolescents in Chengdu city.
  
  
  METHODS
  A total of 1669 children and adolescents aged 7 - 15 years were recruited in Chengdu with cluster sampling. Measurement of pubertal development was conducted among boys/girls and information about consumption of foods rich in protein was collected from food frequency questionnaire. Rank sum test was used to compare food intakes between different pubertal groups.
  
  
  RESULTS
  Among boys, the consumption of red meat and white meat increased with increasing degree of testis volume (P < 0.05). Compared with boys who had spermarche, consumption of red meat, white meat and dairy and dairy products were lower in the boys who did not (P < 0.05). The consumption of red meat and white meat increased with increasing degree of pubertal group and consumption of dairy and dairy products was highest in the early pubertal group (P < 0.05). Among girls, bean intake was higher in the B1 and B5 group of breast development and consumption of dairy and dairy product was highest in the B1 group (P < 0.05). Compared with girls who had menarche, red meat intake was lower, however, consumption of dairy and dairy product were higher in the girls who did not (P < 0.05). The intake of red meat increased with increasing degree of pubertal group in girls, however, the consumption of bean, fish and shellfish, egg and dairy and dairy product decreased (P < 0.05).
  
  
  CONCLUSIONS
  The consumption of foods rich in protein were associated with pubertal development among children and adolescents in Chengdu. However, the different influence between genders needs to be further studied.
authors.forename: Mingzhe
authors.initials: M
authors.lastname: Yang
authors.forename: Hongmei
authors.initials: H
authors.lastname: Xue
authors.forename: Ruonan
authors.initials: R
authors.lastname: Duan
authors.forename: Yan
authors.initials: Y
authors.lastname: Liu
authors.forename: Guo
authors.initials: G
authors.lastname: Cheng
mesh_terms: D000293:Adolescent; D000818:Animals; D002648:Child; D002681:China / Q000453:epidemiology; D003430:Cross-Sectional Studies; D003611:Dairy Products; D004034:Diet Surveys; D004044:Dietary Proteins; D005260:Female; D005399:Fishes; D006801:Humans; D008297:Male; D008461:Meat Products; D015596:Nutrition Assessment; D012741:Sexual Maturation; D011795:Surveys and Questionnaires
chemical_list: D004044:Dietary Proteins