title: Back pain reporting in young girls appears to be puberty-related.
abstract: BACKGROUND
  There is a large increase in back pain reporting in the early teens. In no previous study has the prevalence of low back pain been investigated in relation to the onset of puberty. The objective of this study was to establish whether the onset of puberty is associated with back pain reporting in young girls.
  
  
  METHODS
  A subsample of 254 girls aged 8-10 years and 165 girls aged 14-16 years from a cross-sectional survey of 481 children aged 8-10 years and 325 adolescents aged 14-16 years of both sexes. Main outcome measures were back pain defined as low back pain, mid back pain, and/or neck pain in the past month. Other variables of interest were Puberty (five different stages), age, body mass index, and smoking. Independent information on onset of puberty was obtained through a physical examination and on back pain through an individual structured interview. The association was studied between onset of puberty and the outcome variable (the one month period prevalence of back pain), controlling for overweight, and smoking. Odds ratios with 95% confidence intervals were used to describe bivariate associations, logistic regression with robust standard errors was used for multivariate analyses.
  
  
  RESULTS
  There is a highly significant trend for increased back pain reporting with increasing level of puberty until maturity is reached. The biggest leap appears between the second level (beginning of puberty) and the third level (mid puberty) and the findings remain after controlling for the covariates. These results emanate from the low back, whereas pain in the mid back and neck do not seem to be linked with pubertal stage.
  
  
  CONCLUSIONS
  In girls, the reporting of low back pain increases in frequency during puberty until maturity, regardless of age. Why some girls are susceptible to back pain in the early stage of puberty is unknown.
authors.affiliation: The Back Research Center, BackCenter Funen, Lindevej 5, 5750 Ringe, Denmark. nwedderkopp@health.sdu.dk
authors.forename: Niels
authors.initials: N
authors.lastname: Wedderkopp
authors.forename: Lars Bo
authors.initials: LB
authors.lastname: Andersen
authors.forename: Karsten
authors.initials: K
authors.lastname: Froberg
authors.forename: Charlotte
authors.initials: C
authors.lastname: Leboeuf-Yde
mesh_terms: D000293:Adolescent; D001416:Back Pain / Q000453:epidemiology*; D002648:Child; D003430:Cross-Sectional Studies; D003718:Denmark / Q000453:epidemiology; D005260:Female; D006801:Humans; D015995:Prevalence; D011627:Puberty; D012737:Sex Factors