Heightened sensitivity to somatosensory stimuli in anorexia nervosa: an exploratory study with the SASTCA scale.
OBJECTIVE
To analyse the presence of heightened sensory sensitivity in patients with anorexia nervosa, which seems similar but not identical to that described in patients with unexplained somatic symptoms or body dysmorphic disorder.


METHODS
We developed a sensory sensitivity scale in eating disorders (SASTCA), which measures the intensity of the response to specific somatosensory stimuli. The scale was completed by 48 patients with anorexia and a control group of 31 participants matched in age, sex and social and educational level. The results were compared with those obtained with the Barsky Somatosensory Amplification Scale (SSAS).


RESULTS
The reliability (Cronbach's/alpha, 0.946; Guttman/ split-half, 0.936) and validity (ROC, 0.933) of the SASTCA scale are indicative of its high sensitivity and specificity. The anorexia group had a significantly higher mean score on the SASTCA scale than the control group (p<.001). Similarly, the patients with anorexia had a significantly higher mean value on the SSAS than the participants in the control group (p<.01), although the difference was less extreme. The 2 scales correlated positively (r=.634).


CONCLUSIONS
These preliminary results suggest the presence in Anorexia of heightened sensory sensitivity which differs from the sensitivity of the control group. This sensitivity has a significant relationship with that described in patients with somatic complaints about health (SSD) or appearance (BDD). Could this heightened sensory sensitivity help us to explain the process of forming the distorted body self-concept (I'm fat, sick, ugly) in all these patients? Once its presence has been confirmed in other patients with anorexia, their relatives and other patients with somatic disorders this heightened sensitivity could constitute the somatic endophenotype of anorexia?
PhD in Psychology. Chairman Eating Disorders Unit. Hospital La Paz. Madrid, Spain.. rosa.calvo@salud.madrid.org.
Rosa
R
Calvo Sagardoy
PhD in Psychology. Clinical Psychologist. Hospital La Paz. Madrid, Spain.. rosa.calvo@salud.madrid.org.
Luis T
LT
Gallego Morales
Clinical Psychologist. Hospital La Paz. Madrid, Spain.. rosa.calvo@salud.madrid.org.
Soledad
S
Kassem García
Psychiatrist. Hospital of Valdemoro. Madrid, Spain.. rosa.calvo@salud.madrid.org.
Rosana
R
Codesal Julián
PhD in Psychology. Teacher at the European University of Madrid, Spain.. rosa.calvo@salud.madrid.org.
Ascensión
A
Blanco Fernández
Nutrition Degree. Inyda Centre. Madrid, Spain.. rosa.calvo@salud.madrid.org.
Gloria
G
Solórzano Ostolaza
Nutritionist Degree. Inyda Centre. Madrid, Spain.. rosa.calvo@salud.madrid.org.
Carmen
C
Morales Martínez
D000328:Adult; D000856:Anorexia Nervosa / Q000150:complications* / Q000523:psychology; D019540:Area Under Curve; D001828:Body Image; D016022:Case-Control Studies; D003430:Cross-Sectional Studies; D004198:Disease Susceptibility; D004644:Emotions; D058068:Endophenotypes; D005260:Female; D006801:Humans; D006941:Hyperesthesia / Q000150:complications* / Q000175:diagnosis / Q000523:psychology; D008297:Male; D009460:Neurologic Examination; D062072:Patient Acuity; D010812:Physical Stimulation; D011237:Predictive Value of Tests; D011594:Psychometrics; D012372:ROC Curve; D015203:Reproducibility of Results; D012649:Self Concept; D013001:Somatoform Disorders / Q000175:diagnosis; D011795:Surveys and Questionnaires; D055815:Young Adult