4OBJECTIVE: Develop and validate a child and adolescent version of the Three Factor Eating 5 Questionnaire (CTFEQr17), and to assess its psychometric properties and factor structure. We 6 also examined associations between the CTFEQr17 and body mass index (BMI) and food 7 preferences. RESULTS: The CTFEQr17 showed good internal consistency (Cronbach's =0.85) and the 18 three factor structure was retained: cognitive restraint (CR), uncontrolled eating (UE) and 19 emotional eating (EE). Qualitative data demonstrated a high level of understanding of the 20 questionnaire (95%). A high CR was found to be significantly associated with a higher body 21 weight, BMI and BMI percentile. High UE and EE scores were related to a preference for high 22 fat savoury and high fat sweet foods. The relationships between CTFEQr17, anthropometry 23 and food preference were stronger in girls compared to boys.
24CONCLUSIONS: The CTFEQr17 is a psychometrically sound questionnaire for use in 25 children and adolescents, and is associated with anthropometric and food preference measures.
INTRODUCTION
29The prevalence of obesity in children and adolescents has reached epidemic proportions 30 worldwide and is associated with many comorbidities (1)(2)(3) . Pediatric obesity is closely linked 31 to the so-called "obesogenic" environment where a myriad of factors are conducive to eating 32 too much and not moving enough, thereby promoting weight gain and ultimately overweight 33 and obesity (4, 5) . Among the many factors that explain the susceptibility to gain weight, a better 34 understanding of the link between eating behaviours and weight gain is of crucial importance
35to overcome the rising rates of obesity.
37Obesity interventions have to consider individuals' eating behaviours, especially those that 38 have been associated with obesity and weight gain (6, 7) . For example, dietary restriction can 39 promote overeating in dietary restrained adolescents having disinhibited eating behaviour (8) .
40Additionally, adolescents with high restrained eating behaviour scores are more likely to gain 41 weight over time (9) . Properly assessing eating behaviours of children and adolescents remains, 42 however, challenging. uncontrolled eating refers to eating in response to food palatability and the likelihood to over-53 consume, and emotional eating represents the process to eat in response to negative moods (13) .
55Despite a significant body of literature regarding the utility of the TFEQ in adults (13 -18) , the The objective of this study was to develop an adapted-version of the adult TFEQr21 to be used 65 among children and adolescents (CTFEQr17), and to assess its psychometric properties and 66 factor structure. We also examined the associations between the CTFEQr17 and body mass 67 index (BMI) and food preferences as a secondary objective.
METHODS
71The process of developing and validating the CTFEQr17 was a two-phase process: the
Anthropometric Measurements
127A subsample of children had their height and weight measu...