Accuracy of Self-Reported Weight Among Adolescent and Young Adults Following Bariatric Surgery

Obes Surg. 2017 Jun;27(6):1529-1532. doi: 10.1007/s11695-016-2514-4.


Purpose: This study evaluates accuracy of self-reported weight in adolescent bariatric surgery patients.

Materials and methods: During follow-up visits, participants self-reported weight and had weight measured. The differences between self-reported and measured weights were analyzed from 60 participants.

Results: Participants were 70% (n = 42) female, 72% (n = 43) white, mean age of 20.8 years and a median body mass index of 36.6 kg/m2. At an average of 3.5 years following surgery, females underestimated weight (0.5 kg, range: -18.7 to 5.6 kg), while males overestimated (1.1 kg, range: -7.8 to 15.2 kg). Most (80%, n = 48) reported within 5 kg of measured weight. The majority of adolescents who previously underwent bariatric surgery reported reasonably accurate weights, but direction of misreporting varied by gender.

Conclusion: Self-reported weights could be utilized when measured values are unavailable without markedly biasing the interpretation of outcomes.

Keywords: Adolescent; Bariatric surgery; Self-report; Validation; Weight.

Publication types

  • Validation Study

MeSH terms

  • Adolescent
  • Adolescent Health Services
  • Adult
  • Bariatric Surgery
  • Female
  • Humans
  • Male
  • Obesity, Morbid / surgery*
  • Postoperative Period
  • Reproducibility of Results
  • Self Report*
  • Treatment Outcome
  • United States
  • Weight Loss*
  • Young Adult