We followed up, after 3 1/2 years, a whole population cohort of 249 patients with Parkinson's disease (PD) 1st examined in 1983 to 1984. Of the survivors, 23.6% qualified for a DSM III-R diagnosis of dementia. In univariate tests, age, certain items of the Webster scale, the Hoehn and Yahr scale, a 10-question mental status questionnaire, and a history of smoking were associated with a diagnosis of dementia 3 1/2 years later. Logistic regression with DSM III-R diagnosis (demented versus nondemented) as the dependent variable, and age and symptom scales for PD as predictor variables, revealed that PD symptoms predicted dementia even after controlling for age. We conclude that dementia is probably more common in PD patients than would be expected in the general population and is associated with the severity of PD symptoms and signs independently of age.

This paper describes the use of simulated patients in medical education and how actors have been deployed with medical students in Aberdeen. The advantages and disadvantages of using actors for student education are summarised and we conclude with some possible future developments. At the outset, it may be helpful to outline some definitions, as in the review by Barrows (1993). A ‘standardised patient’ is an umbrella term for both an actual patient who is trained to present his or her own illness in a standardised way and also for a simulated patient who is a well person trained to portray an illness in a standardised way. This paper will use these terms but will relate mainly to the use of professional actors (not volunteers from the general public, who are often deployed by medical teachers) as simulated psychiatric patients.

Doctors perform poorly in identifying and in treating patients with alcohol misuse problems and this has been linked to inadequate undergraduate education. We compared three methods of teaching among Aberdeen medical students. In groups of eight or nine students, teaching was conducted with a simulated patient, with real patients or with a videotaped interview. The teachers were five consultant psychiatrists. At the end of each teaching session, students completed a measure of knowledge (multiple-choice questions), two measures of attitudes towards alcohol misusers and a questionnaire tailored to assessment of the teaching session. From the class of 176 students, 156 (89%) participated in the study. Two-way analyses of variance identified a significant difference between teaching methods; students rated the simulated patient sessions as more helpful in acquiring interview skills (F = 11.71, df 2, p < 0.001). We have since expanded our use of simulated patients in the undergraduate teaching programme.

SYNOPSISA whole population cohort of 157 patients with idiopathic Parkinsonism, most of whom had previously been clinically examined by Mutch (1986 a), were assessed to determine prevalence figures for dementia and examine the relationship between dementia, cognitive impairment and Parkinsonian signs. Dementia according to DSM-III-R criteria was diagnosed in 23·3% of all patients (95% confidence interval: 17·1 to 32·4%). Dementia and cognitive impairment were associated with overall measures of Parkinsonian impairment and rigidity, but not tremor, even after controlling for age, sex and education.

Two hundred and forty-nine patients with Parkinson's disease previously examined by Mutch et al 1,2 were followed up three and a half years after the original study. Cognitive impairment, age, some postural signs and symptoms of Parkinson's disease and high scores on the Hoehn and Yahr scale predicted premature death. Patients were more likely to die from respiratory infections than controls. Respiratory diseases as cause of death recorded on the death certificate were not related to kyphosis, posture scores or Hoehn and Yahr scores before death. The hypothesis is advanced that death of respiratory causes might be associated with signs of general autonomic dysregulation.