title: Do patients lose weight after total hip arthroplasty?
abstract: OBJECTIVE
  To investigate the effect of total hip arthroplasty (THA) on body mass index (BMI), from before to after the operation.
  
  
  METHODS
  100 patients who underwent THA were retrospectively analyzed. They were stratified according to BMI, as proposed by the World Health Organization (WHO).
  
  
  RESULTS
  There were 48 male patients and 52 female patients. Their mean age was 63.8 ± 13.5 years. The mean follow-up was 24.6 ± 0.6 months. The men had a mean preoperative BMI of 28.4 ± 3.6 kg/m(2) and the women, 27.5 ± 5.0 kg/m(2). The mean postoperative BMI was 28.9 ± 0.7 kg/m(2) for the men and 27.8 ± 0.7 kg/m(2) for the women. There was a general mean increase in BMI of 0.4 kg/m(2). The BMI increased both in patients with normal weight and in those who were overweight, but it decreased slightly in patients who were obese. BMI remained unchanged in the majority of the patients (73%).
  
  
  CONCLUSIONS
  The improvement in mobility achieved through THA did not promote any reduction in anthropometric measurements in the majority of the patients.
authors.affiliation: Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil ; Orthopedics and Traumatology Service, Santa Casa de Porto Alegre, Porto Alegre, RS, Brazil.
authors.forename: Carlos Roberto
authors.initials: CR
authors.lastname: Schwartsmann
authors.affiliation: Orthopedics and Traumatology Service, Santa Casa de Porto Alegre, Porto Alegre, RS, Brazil.
authors.forename: Felipe Ribeiro
authors.initials: FR
authors.lastname: Ledur
authors.affiliation: Hip Surgery Group, Orthopedics and Traumatology Service, Santa Casa de Porto Alegre, Porto Alegre, RS, Brazil.
authors.forename: Leandro de Freitas
authors.initials: Lde F
authors.lastname: Spinelli
authors.affiliation: School of Medicine, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil.
authors.forename: Bruno Lorandos
authors.initials: BL
authors.lastname: Germani
authors.affiliation: Hip Surgery Group, Orthopedics and Traumatology Service, Santa Casa de Porto Alegre, Porto Alegre, RS, Brazil.
authors.forename: Leonardo Carbonera
authors.initials: LC
authors.lastname: Boschin
authors.affiliation: Hip Surgery Group, Orthopedics and Traumatology Service, Santa Casa de Porto Alegre, Porto Alegre, RS, Brazil.
authors.forename: Ramiro Zilles
authors.initials: RZ
authors.lastname: Gonçalves
authors.affiliation: Hip Surgery Group, Orthopedics and Traumatology Service, Santa Casa de Porto Alegre, Porto Alegre, RS, Brazil.
authors.forename: Anthony Kerbes
authors.initials: AK
authors.lastname: Yépez
authors.affiliation: Orthopedics and Traumatology Service, Santa Casa de Porto Alegre, Porto Alegre, RS, Brazil.
authors.forename: Marco Tonding
authors.initials: MT
authors.lastname: Ferreira
authors.affiliation: Department of Physiotherapy, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil.
authors.forename: Marcelo Faria
authors.initials: MF
authors.lastname: Silva
keywords: Body mass index; Hip arthroplasty; Hip/surgery; Weight loss