Body mass index and Blount disease

Marinis Pirpiris, Kent R. Jackson, Eugene Farng, Richard E. Bowen, Norman Y. Otsuka

Research output: Contribution to journalArticlepeer-review

35 Scopus citations


As the increasing prevalence of overweight and obese children is approaching epidemic proportions in North America, this study was designed to investigate whether Body Mass Index (BMI) and age- and gender-specific percentile Body Mass Index (BMI %) are associated with the likelihood of being listed for surgery for Blount disease after initial presentation to a tertiary referral centre. In a restrospective consecutive sample of 102 children with an average age of 5.9 ± 4.3 years, it was determined that there was a significant association between BMI and BMI% and being listed for surgery, after adjusting for the effects of the child's age and gender, with mean odds ratios of 1.30 (95% confidence interval 1.02-1.60) and 1.05 (95% confidence interval 1.01-1.09) respectively. When the sample was subgrouped into infantile (less than 3 years of age) and late-onset (greater than 3 years of age), BMI and BMI% were still significantly associated with the children being listed for surgery in the late-onset group with mean odds ratios 2.75 (95% confidence interval 1.03-7.33) and 1.09 (95% confidence interval 1.01-1.18) respectively. However, of the two measures only the BMI was significant in the infantile group with an odds ratio of 1.27 (95% confidence interval 1.01-1.60). Should these associations be real then measures aimed at decreasing weight in children may have some effect on the number of children undergoing surgery for the treatment of Blount disease.

Original languageEnglish (US)
Pages (from-to)659-663
Number of pages5
JournalJournal of Pediatric Orthopaedics
Issue number5
StatePublished - Sep 2006
Externally publishedYes


  • Adolescent Blount disease
  • BMI
  • Blount disease
  • Body mass index
  • Infantile Blount disease
  • Obesity
  • Overweight
  • Surgery

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Orthopedics and Sports Medicine


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