title: Patterns and correlates of pubertal development in Canadian youth: effects of family context.
abstract: BACKGROUND
  Current health literature suggests that there has been a decline in the age of pubertal onset, and that pubertal development is influenced by social context. Unfortunately, contemporary Canadian-specific data have not been available. This study examined the odds of having entered puberty at various ages during adolescence, before and after controlling for the effects of family socio-economic status and family structure.
  
  
  METHODS
  Longitudinal data for this study were drawn from the first four cycles of the National Longitudinal Survey of Children and Youth. The final sample consisted of 7977 adolescents ranging in age from 10 to 17. Pubertal status of the participants was identified based on pubic hair, facial hair growth, and voice change, for boys; and pubic hair, breast development, and menstruation, for girls. Trajectories of pubertal development were analyzed with HLM growth curve modelling techniques.
  
  
  RESULTS
  The results indicated that, compared to boys, the odds of having entered puberty at age 13 were 6.45 times higher for girls and that girls go through puberty more quickly. Low family socio-economic status and living with a stepfather were found to predict early onset of pubertal development.
  
  
  CONCLUSIONS
  Contextual factors are related to pubertal development. Additional research is needed to develop a more solid understanding of how psychosocial factors interact to predict gendered patterns of pubertal development.
authors: Department of Educational and Counselling Psychology, and Special Education, University of British Columbia, Vancouver, BC. rubab@interchange.ubc.ca
authors: Rubab G
authors: RG
authors: Arim
authors: Jennifer D
authors: JD
authors: Shapka
authors: V Susan
authors: VS
authors: Dahinten
authors: J Douglas
authors: JD
authors: Willms
mesh_terms: D000293:Adolescent; D016497:Adolescent Health Services; D000367:Age Factors; D002170:Canada; D002648:Child; D005191:Family Characteristics; D005260:Female; D006801:Humans; D008297:Male; D011446:Prospective Studies; D011627:Puberty; D012111:Residence Characteristics; D046468:Sexual Development; D012923:Social Class; D012931:Social Environment; D013997:Time Factors