Research Letter |

Validity of Self-reported Weights Following Bariatric Surgery

Nicholas J. Christian, PhD1; Wendy C. King, PhD1; Susan Z. Yanovski, MD2; Anita P. Courcoulas, MD, MPH3; Steven H. Belle, PhD, MScHyg1
[+] Author Affiliations
1University of Pittsburgh Graduate School of Public Health, Pittsburgh, Pennsylvania
2National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland
3University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
JAMA. 2013;310(22):2454-2456. doi:10.1001/jama.2013.281043.
Text Size: A A A
Published online


Obtaining standardized weights in long-term studies can be difficult. Self-reported weights are more easily obtained but are less accurate than those from a calibrated scale and may be inaccurately reported. Previous studies have reported that women tend to underreport their weight more than men with the degree of misreporting related to body mass index (BMI), whereby overweight individuals tend to underreport and underweight individuals tend to overreport.14 However, in a study of female gastric bypass candidates, self-reported presurgical weights averaged 0.3 kg more than measured weights and misreporting was not significantly related to BMI.5

Figures in this Article

Sign In to Access Full Content

Don't have Access?

Register and get free email Table of Contents alerts, saved searches, PowerPoint downloads, CME quizzes, and more

Subscribe for full-text access to content from 1998 forward and a host of useful features

Activate your current subscription (AMA members and current subscribers)

Purchase Online Access to this article for 24 hours

First Page Preview

View Large
First page PDF preview


Place holder to copy figure label and caption
Difference Between Self-reported and Measured Weights vs Measured Body Mass Index and Percentage Weight Change by Sex

Body mass index was calculated as weight in kilograms divided by height in meters squared. The dashed blue line indicates the mean weight difference. About 95% of the points are expected to fall within 2 SDs of the mean, indicated by the blue shaded areas. For women, self-reported medical weight, the mean ± 2 SD is −3.7 to 3.5 and is −4.6 to 2.8 for self-reported personal weight. For men, self-reported medical weight, the mean ± 2 SD is −5.6 to 5.8 and is −6.4 to 3.4 for self-reported personal weight.

Graphic Jump Location



Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).


Some tools below are only available to our subscribers or users with an online account.

Web of Science® Times Cited: 2

Sign In to Access Full Content

Related Content

Customize your page view by dragging & repositioning the boxes below.

See Also...
Articles Related By Topic
Related Topics
PubMed Articles