Adaptation and validation of the On Your Own Feet - Transition Experiences Scale evaluating transitions to adult services among adolescent mental health service users in Europe.

PURPOSE: Experiences of young people transitioning from Child and Adolescent Mental Health Services (CAMHS) to Adult Mental Health Services (AMHS) have mostly been investigated qualitatively. This study adapts and validates the On Your Own Feet - Transition Experiences Scale (OYOF-TES) in a sample of CAMHS users in Europe and describes young people's and parents' experiences with transition and end of care at CAMHS. METHODS: The OYOF-TES was adapted to a mental health setting and translated. An End Of Care (OYOF-EOC) version (self- and parent-report) was developed. A total of 457 young people and 383 parents completed an OYOF-TES or OYOF-EOC. Psychometric properties and descriptives are presented. RESULTS: The Cronbach's alphas of the OYOF-TES and OYOF-EOC parent/self-report ranged from 0.92 to 0.94. The two-factor structure was confirmed. The mean overall satisfaction reported by young people was 6.15 (0-10; SD=2.92) for transition and 7.14 (0-10; SD=2.37) for care ending. However, 26.7%-36.4% of young people were unsatisfied. DISCUSSION: The OYOF-TES and OYOF-EOC can be used reliably in mental healthcare settings to capture young people's and parents' transition experiences. The majority of young people and parents was satisfied with the process of transition and care ending, yet a third of young people had negative experiences.

Pre-pulse inhibition and striatal dopamine in subjects at an ultra-high risk for psychosis.

Reduced prepulse inhibition (PPI) of the acoustic startle response is thought to represent a robust biomarker in schizophrenia. Reduced PPI has been demonstrated in subjects at ultra high risk (UHR) for developing psychosis. Imaging studies report disruption of striatal dopaminergic neurotransmission in patients with schizophrenia. First, we compared the PPI of the acoustic startle response in UHR subjects versus healthy controls, to see if we could replicate previous findings of reduced PPI; secondly, we investigated our hypothesis that PPI would be negatively correlated with striatal synaptic dopamine (DA) concentration. We measured the startle reactivity and PPI of the acoustic startle response in 14 UHR subjects, and 14 age- and gender-matched healthy controls. Imaging of 11 UHR subjects and 11 healthy controls was completed by an [(123)I]-IBZM (radiotracer for dopamine D2/3 receptors) SPECT, at baseline and again after DA depletion with alpha-methyl-para-tyrosine (AMPT). The percentage change in striatal [(123)I]-IBZM radiotracer binding potential is a proxy of striatal synaptic DA concentration. UHR subjects showed reduced PPI, compared to control subjects. In both UHR and control subjects, there were no significant correlations between striatal synaptic DA concentration and PPI. We provide further evidence for the hypothesis that these two biomarkers are measuring different aspects of pathophysiology.