Eating disorders ha ve increased over the last few years, as well as the age range of their initialonset which includes younger people. Food-related anxiety, fear of gaining weight, and obsession with thinness are associated with variables of age, sex, social leve!, body mass index, distortion and dissatisfaction with body image are considered risk factors for eating disorders. This research examined the relationship among these factors and analyzed their predictive value. The participants were 200 adolescents (104 boys and 96 girls), aged between 14 and 17 years. The testsused werc the STAI, EDI-2, EAT and two experimental tests. The results indicated that underlying these disorders were distorted body-image perception and dissatisfaction. The risk for girlsincreased between 15 and 16 years. Dissatisfaction with global physical aspect, distortion of body size, age, and trait anxiety were revealed as predictive factors. / La ansiedad con relación a la comida, el temor a aumentar de peso y la obsesión por la delgadez van asociadas a variables de edad, sexo, nivel social, índice de masa corporal, distorsión einsatisfacción con la imagen corporal y se consideran factores de riesgo de los trastornos alimenticios.Se investigan y analizan las relaciones entre dichos factores así como su valor predictivo. Los participantes fueron 200 adolescentes de 14 a 18 años (104 chicos y 96 chicas). Se administraron el Cuestionario de Ansiedad Estado/Rasgo (STA!), el Inventario de Trastornos dela conducta Alimentaria (EDI-2) el Eating Altitudes Test (EAT) y dos instrumentos en construcción.Los resultados revelaron que la percepción distorsionada de la imagen del propio cuerpo,vinculada a la insatisfacción, se halla a la base de estos trastornos. La edad más sensible paralas chicas está entre los 15 y 16 años y los factores predictivos encontrados son: insatisfacción con el aspecto físico global, distorsión del tamaño del cuerpo, edad y ansiedad rasgo.