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Baseline BMI was stratified using the following definitions: underweight (<18.5 kg/m2), normal weight (18.5–24.99 kg/m2), overweight (25.0–29.99 kg/m2), class I obesity (30.0–34.99 kg/m2), class II obesity (35.0–39.99 kg/m2), and class III obesity (≥40 kg/m2).
