PREVALENCE, PREDICTORS AND ASSOCIATIONS OF APATHY IN ADULT SURVIVORS OF AN EARLY CHILDHOOD POSTERIOR FOSSA BRAIN TUMOUR
Cliodhna Carroll, Peter Watson, Mike Hawkins, Helen Spoudeas, David Walker, Tony Holland and Howard Ring
Author Affiliation: University of Cambridge
INTRODUCTION: Apathy is a disorder of  diminished motivation defined as a deficiency in behavioural, emotional  and cognitive                         components of goal-directed behaviour. It occurs  in several neurological pathologies and is associated with pervasive  and                         disadvantageous effects on daily life. In this  study we examined prevalence, predictors and associations of apathy in  adult                         survivors of a childhood posterior fossa tumour.  METHODS: 118 adult survivors of early childhood (diagnosed before 5  years                         of age) posterior fossa tumours, and 62 of their  siblings, were assessed an average of 32 years after initial tumour  treatment,                         using the Weschler Abbreviated Scale of  Intelligence, the Marin apathy evaluation scale and the Composite  International Diagnostic                         Interview. 
RESULTS: Apathy scores reached or  exceeded clinical cut-off in 35% of survivors compared to 18% of the  comparison                         group. In the survivors this was associated with  decreased employment, decreased income and lower self-ratings of  physical                         and mental health. Apathy scores at or above  cut-off were associated with lower verbal IQ scores and with a current  or previous                         psychiatric diagnosis, but not with age at  tumour treatment (all were < 5 years), duration of follow-up, history  of radiotherapy                         or tumour type (astrocytoma or medulloblastoma).  Clinically significant apathy in the survivors was not associated with a                         diagnosis of depression or with performance IQ  measures. 
CONCLUSIONS: Clinically significant apathy occurs relatively  often                         in adult survivors of childhood brain tumours  and is associated with impaired social functioning and increased  psychopathology.                         Further research should determine whether any  tumour or treatment-related variables increase risk of apathy.                      
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