BMI
Body Mass Index. Weight in kg divided by height in meters squared. Screening tool.
BMI = weight (kg) / height (m)². Categories: <18.5 underweight, 18.5-24.9 healthy, 25-29.9 overweight, 30+ obese. Imperfect — doesn't distinguish muscle from fat, doesn't account for body composition. Still the primary eligibility metric for GLP-1 programs (≥27 with comorbidity, ≥30 alone).