A Study to Test the Feasibility, Usability and Accuracy of a Smart Phone Food-Record App to Assess Dietary Intake in Patients Who Have Undergone Gastric Bypass Surgery


About this study

The purpose of this study is to assess the acceptability and accuracy of the smart phone food record App ‘HealthWatch 360’ in collecting food intake data from subjects. The nutritional analysis obtained will be compared with that of a 24 hour recall to assess accuracy.

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. There is no guarantee that every individual who qualifies and wants to participate in a trial will be enrolled. Contact the study team to discuss study eligibility and potential participation.

Inclusion Criteria:

  • 6+ months post gastric bypass surgery (subjects that are within 2 weeks of 6 month post-surgery will be allowed to participate).
  • Own smartphones (iOS and Android operating systems).
  • Willing to download the App on their phone and complete 2 days of food records.
  • Ability to read and understand English.
  • Ability to use online app.
  • Willing to complete 2 x 24 hour recalls by phone on the day immediately following each food record.
  • Ability to consume solid food.

Exclusion Criteria: 

  • Do not own smartphones (iOS and Android operating systems).
  • Inability to use online app.
  • Hearing or visual impairment that restricts the use of the phone App or the conduct of a phone interview.
  • Poor English literacy skills.

Participating Mayo Clinic locations

Study statuses change often. Please contact the study team for the most up-to-date information regarding possible participation.

Mayo Clinic Location Status

Rochester, Minn.

Mayo Clinic principal investigator

John Lieske, M.D.

Closed for enrollment

More information


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