El objetivo de este estudio es examinar las propiedades psicométricas de la Escala de Ortorexia de Teruel (TOS) en estudiantes universitarios de la carrera de nutrición en Lima (Perú). Los participantes fueron 220 estudiantes universitarios de 18 a 30 años (77.27% mujeres, M = 22.57 años; D.E. = 2.78), quienes completaron los cuestionarios en línea. Se utilizó la escala TOS de 17 ítems con formato de respuesta Likert de 4 puntos. La estructura interna de la escala fue evaluada a través del Análisis Factorial Confirmatorio. Se encontró soporte a la estructura bidimensional de la escala, pero se requirió eliminar los ítems 7, 9, 13, 15. La consistencia interna fue aceptable, siendo los coeficientes alfa de Cronbach de .72 para Ortorexia Saludable, y de .73 para Ortorexia Nerviosa. En cuanto a la validez convergente se utilizó la Escala de Afecto Positivo y Negativo (PANAS) y la Intuitive Eating Scale (IES-2). Se encontraron correlaciones positivas y significativas entre la Ortorexia Saludable y el Afecto Positivo, y la Congruencia entre cuerpo y comida elegida. Por su parte, la Ortorexia Nerviosa correlacionó de manera positiva y significativa con el índice de masa corporal, la Congruencia entre cuerpo y comida elegida, el Afecto Negativo, y de manera negativa con el Permiso incondicional para comer y el Comer por razones físicas y no emocionales. Se concluye que la escala TOS cuenta con adecuadas propiedades psicométricas en la muestra de estudio. / The aim of the current study is to examine the psychometric properties of the Teruel Orthorexia Scale (TOS) in a sample of university students from an academic program of nutrition in Lima (Perú). Participants were 220 university students aged 18 to 30 years old (77.27% women, M = 22.57 years; D.E. = 2.78), who completed an online survey. We used the 17-item TOS scale that uses a Likert scale of four points. The internal structure of the scale was examined through a Confirmatory Factor Analysis. We found support for the bidimensional structure of the scale, but removing the items 7, 9, 13, 15. Internal reliability was acceptable, being the Cronbach's alpha values of .72 for Healthy Orthorexia and .73 for Orthorexia Nervosa. Regarding the convergent validity, we used the Positive and Negative Affect Scale (PANAS), and the Intuitive Eating Scale (IES-2). We found positive and significant correlations between Healthy Orthorexia and Positive Affect, and Body-Food Choice Congruence. On the other hand, Orthorexia Nervosa correlated positively and significantly with body mass index, Body-Food Choice Congruence, Negative Affect, and negatively with Unconditional Permission to Eat, and Eating for Physical Rather Than Emotional Reasons. It is concluded that the TOS has appropriate psychometric properties in the current sample. / Tesis

The diploma thesis is focusing on the topic of eating disorders in young men. The literature review summarizes the current information concerning eating disorders in this population. Eating and feeding disorders included in DSM - 5 are described. The thesis also focuses on orthorexia nervosa and muscle dysmorphia. A separate chapter deals with body image in men and its connection to eating disorders. The final chapter of the literary review section is focused on the possibilities of diagnostics and therapy. The empirical part of the work consists of a quantitative research conducted on a sample of 164 men aged 18-30 years. A questionnaire survey was carried out. Using Spearman's correlation coefficient, a significant correlation was found between the symptomatology of eating disorders and muscle dysmorphia. There was also a significant correlation between Body Mass Index and the symptoms of eating disorders and also between BMI and muscular dysmorphia. Data analysis revealed a positive correlation between the higher symptomatology of eating disorders and dissatisfaction with the amout of body fat. No significant relationship was found between the symptomatology of eating disorders and dissatisfaction with muscle mass. There was a significant correlation between Body Mass Index and dissatisfaction...