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have one or more serious limitations, such as inconsistent
factor structures or poor discriminant validity. The goal of this
study was to overcome these limitations through the devel-
opment of a comprehensive multidimensional measure of
eating pathology.
Methods:
An initial item pool of 160 items
was developed to assess 20 dimensions of eating pathology.
The initial item pool was administered to a student sample
(
N
=433) and community sample (
N
=407) to determine the
preliminary structure of the measure using exploratory and
confirmatory factor analyses. The revised measure was ad-
ministered to independent samples of ED patients (
N
=161),
general psychiatric patients (
N
=307) and students (
N
=227).
Results:
Analyses revealed a 6-factor structure that showed
excellent convergent and discriminant validity; other analy-
ses demonstrated that the majority of scales were invariant
across sex and weight categories. The final measure was
internally consistent (median coefficient alphas ranged from
.84-.89) and reliable over a two- to four-week period (
r
’s
ranged from .70-.84).
Conclusions:
The current study rep-
resents one of the most comprehensive scale development
projects ever conducted in the field of EDs and is expected to
improve future basic and treatment research focused on EDs.
T25
Multisensory processing of auditory and visual stimuli in
patients with anorexia nervosa
Tone S Fuglset
1
, Øyvind Rø
1
, Tor Endestad
2
1
Regional Eating Disorder Service, Oslo University Hosptial,
Oslo, Norway,
2
Institute of Psychology, University of Oslo,
Oslo, Norway
Introduction:
Previous fMRI studies show that patients with
AN process visual stimuli different than controls. However
most studies have used AN specific stimuli such as images
of food, bodies in different shapes and sizes, and images of
self. Aim of this study was to investigate how patients with AN
process neutral visual and auditory stimuli, presented alone
and to manipulate attentional control presented simultane-
ously.
Methods:
16 female adolescent patients diagnosed
with AN and 10 healthy controls, underwent an fMRI scan-
ning while being presented with neutral visual and auditory
stimuli. Stimuli were presented in 3 conditions: i) visual, ii)
auditory, iii) visual and auditory simultaneously.
Results:
Compared to healthy controls, AN patients showed significant
hyperactivation (0.001 uncorr.) in the sub-gyral frontal lobe
when processing visual stimuli, and significant hypoactiva-
tion (0.001 uncorr.) in dorsolateral prefrontal cortex (DLPFC)
when processing visual and auditory stimuli simultaneously.
There were no significant differences during the processing
of auditory stimuli.
Conclusion:
The results demonstrate
that AN patients process visual information differently from
controls. In addtion our findings suggest that AN patients
have difficulties with processing stimuli that comes from two
different sources simultaneously. Further research should
investigate the perceptual system in AN with specific focus on
the relationship between perception and attentional load.
T26
PREVALENCE AND PREDICTORS OF RISKY BEHAVIORS
IN ADOLESCENCE: THE ROLE OF WEIGHT STATUS,
TREATMENT CONDITION AND PSYCHOLOGICAL CONDI-
TIONS
Sónia Gonçalves
1
, Marta Freitas-Rosa
1
, Antunes Henedina
2
1
University of Minho, Braga, Portugal,
2
Hospital of Braga,
School of Health Sciences, Braga, Portugal
Introduction:
The aim of this study was to examine the
prevalence of risk behaviors (self-injurious behaviors and
alcohol/tobacco consumption).
Methods:
370 adolescents
aged 14 to 19 years in three groups - 205 adolescents with
normal weight, 82 from the general population with over-
weight/obesity and 83 with overweight/obesity and in outpa-
tient treatment for weight control, and to examine the roles
of gender, weight, treatment condition, and psychosocial
variables (psychopathological symptoms, social support,
and emotional skills) in the presence of those risk behaviors.
Results
: The prevalence of risk behaviors was greatest in the
general population overweight group, whereas the overweight
clinical group was similar to or better than their healthy weight
peers. Male gender, non-treatment for weight control, higher
psychopathology, less ability to regulate emotions, lower
family support and higher intimate support are predictors for
at least one of the three studied risk behaviors.
Conclusion:
This study discusses the theoretical and practical implications
of these findings.
T27
DYSREGULATED BEHAVIORS IN BULIMIA NERVOSA - A
CASE CONTROL STUDY
Sonia Gonçalves
1
, Barbara Machado
2
, Martins Carla
1
,
Brandão Isabel
3
, Torres António
3
, Machado, P,P Paulo
1
1
University of Minho, Braga, Portugal,
2
Portuguese Catholic
University, Porto, Portugal,
3
Hospital São João, Porto, Portu-
gal
Introduction:
A specific link between bulimia nervosa (BN)
and some impulsive behaviors like self-injurious behavior,
suicide attempts, and other behaviours’ related to lack of con-
trol has been observed
Aims
: This study aimed to evaluate
the frequency of these behaviors in a population diagnosed
with BN (
N
= 79), using two control groups, a healthy control
group (
N
= 86) and a control group with subjects with other
psychiatric disorders (
N
= 68). This study also evaluated the
possible association between sexual abuse and parasuicide
behaviors.
Method
: The subjects of the study were 233
women with ages between to 13 to 38 years (
M
= 20.82 and
SD
= 4.92). Subjects were evaluated using a semi-structured
interview designed to evaluate risk factors related to the
development of eating disorders (Oxford Risk Factor Inter-
view – RFI; Fairburn & Welch, 1990).
Results
: BN subjects
show higher frequency (at
p
<.001) of self-injurious behaviors
and suicide attempts by drug overdose compared with normal
control (NC) group and the psychiatric control (PC) group. No
association was found between history of sexual abuse and
self-injurious behaviors and/or suicide attempts. Compared
with the two control groups, women with BN reported poor
control in smoking and drugs use. BN group also presented
more spending behaviors’ compared with the PC group. Con-
clusion: The association of these behaviors’ with BN subjects
sustains, once again, the possible multi-impulsive nature of
bulimia nervosa.
T28
Seasonal differences in BMI between restrictive and
purging Anorexia Nervosa subtypes
Emilio Gutiérrez
1,2
, Veronica Caggianesse
1
, Angela Fraga
1
,
Olaia Carrera
2
, Monserrat Graell
3
, Gonzalo Morandé
3
1
Departamento de Psicología Clínica y Psicobiología, Facul-
tad de Psicología, Universidad de Santiago de Compostela,
Santiago de Compostela, Spain,
2
Unidad Venres Clínicos,
Facultad de Psicología, Universidad de Santiago de Compos-
tela, Santiago de Compostela, Spain,
3
Unidad de Trastornos
de Alimentación. Sección de Psiquiatría y Psicología. Hospi-
tal Infantil Universitario Niño Jesús, Madrid, Spain
Introduction.
Ambient temperature has been overlooked
in research on anorexia nervosa (AN). Recent clinical and
preclinical research involving both AN patients and semi-star-
vation animal models have revealed the importance of this
environmental factor. The aim of the study was to detect the
effect of environmental temperature on body mass index and
weight gain both at admission and during weight restoration
in hospital.
Methods.
Consecutive admissions to the Eating
Disorders Unit at the Hospital Niño Jesus in Madrid were ret-
rospectively classified according to the season of admission.
Patients were divided in two groups according to monthly
mean ambient temperature, Warm -May to October- vs. Cold
-November to April.
Results
. Results revealed differences in
BMI at admission between compulsive-purging (AN-P) and
restrictive (AN-R) anorexia nervosa subtypes that were due
to lower AN-R patients’ BMI during the colder months of the
year. This difference in BMI at admission resulted in both a
significantly longer hospital stay for AN-R patients during the
cold season, and higher extra calories received as nutritive
supplements to achieve target BMI for discharge.
Conclu-
sions
. Ambient temperature is a critical factor regarding body
POSTER SESSION 1 ABSTRACTS