Validation of a Digital Visual Analogue Scale for Appetite Measurement

Use of a Digital Visual Analog Scale With Smart Phones for Appetite Measures in the Real World: A Validation Study

The objective of the study is to validate a newly developed digital visual analog scales with a mobile app for measuring human appetite and compare it with a traditional paper-based visual analog scales for appetite measurement.

Inclusion Criteria:

• Healthy adults 18-70 years.
• Body mass index 20-29.9 kg/m² (based on self-reported weight and height).
• Understand the study procedures.
• Willing to maintain habitual diet, physical activity pattern, and body weight throughout the trial.
• Willing to follow study procedures on test days.
• Willing to abstain from strenuous exercise, consuming alcoholic drinks 24 hours before the test day.
• Willing to provide informed consent to participate in the study.

Exclusion Criteria:

• Pregnant or lactating women, or women who are planning to become pregnant during the study
• Known food allergies, sensitivity, or intolerance to any food or food ingredients
• Participating in another clinical trial for food, investigational drug, nutritional supplement, or lifestyle modification
• Taking medications that affect appetite, metabolism, or blood pressure
• Presence of acute diseases or infection
• Presence or history of chronic diseases
• Diagnosed with eating disorders
• Restraint eaters
• Lost or gained 5 pounds or more in the past 3 months
• On a weight-loss diet, or undergoing intermittent fasting
• COVID-19 infection in the past 3 months.