The evaluation of the eating behavior was performed with the help of the Three Factor Eating Questionnaire-R21 (TFEQ-R21), translated version and validated for Portuguese. This is a self-report questionnaire composed of 21 items, with 4 response options for questions 1 to 20 and question 21 is evaluated on a likert 8-point scale. TFEQ-R21 evaluates 3 types of eating behavior: cognitive restriction (CR), emotional eating (EE) and uncontrolled eating (UE). The CR scale assesses the tendency to control food intake in order to influence body weight and body shape, with 6 items in scale. The EE scale measures the propensity to overeat in relation to negative mood states, e.g., when feeling lonely, anxious, or depressed, has 6 items. The UE scale assesses the tendency to lose control over eating when feeling hungry or when exposed to external stimuli, has 9 of items in scale. Each score ranges from 0 to 100, with higher score indicative of greater level in the eating behavior of interest.

The FCQ-State consists of 15 questions, grouped into five dimensions: An intense desire to eat (Desire); anticipation of positive reinforcement that may result from eating (Pos R); anticipation of relief from negative states and feelings as a result of eating (Neg R); thoughts of preoccupation with food and lack of control over eating (Lack Co); and craving as part of the sensation of hunger, a physiological state (Hunger). Participants must answer each question related to what they are feeling at the moment, using a Likert scale of five points, the extremes of which are "(1) strongly disagree" and "(5) strongly agree". The full-scale score corresponds to the sum of the scores obtained in each dimension, which is calculated by simply adding them. Total scores can vary from 15 to 75.

Own Checklist - Demographic variables as well as habitual life style, clinical and anthropometric characteristics were assessed. Clinical variables encompassed indication for LTx, time since LTx and current immunossupressive drugs. Self reported current and past smoking and alcohol consumption were also collected. The patients' weight (kilograms) on the first outpatient visit after LTx was collected from their medical recorders, it is regularly measured with patients wearing light street clothing, no shoes, on a calibrated mechanical scale (Filizola®). Current height (meters) and weight (kilograms) of patients were measured on the day of the interview. Considering these weights, weight gain was assessed by the difference between the current weight and the first post-LTx outpatient weight. Nutritional status was defined according to body mass index (BMI) values as underweight, BMI <18.5 kg/m²; normal weight, BMI 18.5-24.9 kg/m²; overweight, BMI 24.9-29.9 kg/m² and obese, BMI >30 kg/m².