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


  • Study type

  • Study IDs

  • Describes the nature of a clinical study. Types include:

    • Observational study — observes people and measures outcomes without affecting results.
    • Interventional study (clinical trial) — studies new tests, treatments, drugs, surgical procedures or devices.
    • Medical records research — uses historical information collected from medical records of large groups of people to study how diseases progress and which treatments and surgeries work best.
  • Site IRB
    • Rochester, Minnesota: 16-007783
    Sponsor Protocol Number: 16-007783

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. If you need assistance understanding the eligibility criteria, please contact the study team.

See eligibility criteria

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 us for help.

Mayo Clinic Location Status Contact

Rochester, Minn.

Mayo Clinic principal investigator

John Lieske, M.D.

Closed for enrollment

Contact information:

Department of Medicine – Clinical Trials Unit

(507) 266-1944


More information


Publications are currently not available

Study Results Summary

Not yet available

Supplemental Study Information

Not yet available