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OBJECTIVES Evidence is accumulating that positive mental states are more than the absence of symptoms, and may play an independent role in health outcomes. The aim of this study is to compare the characteristics and determinants of positive and negative mental states in a population sample. DESIGN A novel analysis of data was undertaken from the General(More)
In a population-based study of Prader Willi syndrome (PWS), we investigated the relation between genetic subtypes of the syndrome and psychiatric morbidity. Of 25 patients aged 18 years or older, seven (28%) had severe affective disorder with psychotic features, with a mean age of onset of 26 years (SD 5.9). The seven people affected, all aged 28 years or(More)
BACKGROUND Obsessive-compulsive disorder has been reported in association with Prader-Willi syndrome. AIMS To report the nature and prevalence of compulsive and similar symptoms associated with Prader-Willi syndrome in a population ascertained as completely as possible. METHOD Attempted complete ascertainment of people with Prader-Willi syndrome in(More)
BACKGROUND Psychotic illness is strongly associated with the maternal uniparental disomy (mUPD) genetic subtype of Prader-Willi syndrome (PWS), but not the deletion subtype (delPWS). This study investigates the clinical features of psychiatric illness associated with PWS. We consider possible genetic and other mechanisms that may be responsible for the(More)
The genetically determined neurodevelopmental disorder, Prader-Willi syndrome (PWS), has two main genetic subtypes: a 15q11-q13 deletion affecting the paternally inherited chromosome 15 and chromosome 15 maternal uniparental disomy (mUPD) in which two maternal copies of chromosome 15 are inherited but no paternal copy. It has been accepted that these(More)
BACKGROUND People with Prader-Willi syndrome (PWS) may have mild intellectual impairments but less is known about their social cognition. Most parents/carers report that people with PWS do not have normal peer relationships, although some have older or younger friends. Two specific aspects of social cognition are being able to recognise other people's(More)
The medical findings from a population-based study of Prader-Willi syndrome (PWS) are discussed (in which birth incidence of PWS was estimated at 1:22,000 and death rate at over 3% per annum). In this study the prevalence of specific medical disorders that might account for a shortened life expectancy were investigated. Of all people with a possible(More)
As part of the Health and Lifestyle Survey (HALS), 6096 adults from a representative sample of community residents completed a standardized questionnaire which elicited psychiatric symptoms--the General Health Questionnaire (GHQ-30) of Goldberg (1972). Their survival status at 7 years was determined, and 474 had died. Respondents whose GHQ score was above(More)
BACKGROUND This study is part of a larger UK-wide study investigating psychiatric illness in people with Prader-Willi syndrome (PWS), and describes the longitudinal aspect of psychiatric illness, in particular psychotic illness, and examines the use and role of psychotropic medication. METHOD A total of 119 individuals with genetically confirmed PWS were(More)