Publications by authors named "Ad Prins"
Background: In quality of care research, limited information is found on the relationship between quality of care and disease outcomes. This case-control study was conducted with the aim to assess the effect of guideline adherence for stroke prevention on the occurrence of stroke in general practice. We report on the problems related to a variant of confounding by indication, that may be common in quality of care studies.
View Article and Find Full Text PDFObjective: To investigate the relationship between elements of practice organization related to stroke prevention in general practice, and suboptimal preventive care preceding the occurrence of stroke.
Design: This study was conducted among 69 Dutch general practitioners in the Rotterdam region. Information on the implementation of elements of practice organization related to stroke prevention was collected by postal questionnaire.
We aimed to examine risk perceptions among patients at moderate to high cardiovascular risk. A questionnaire about perceived absolute risk of myocardial infarction and stroke was sent to 2424 patients with hypertension or diabetes. Response rate was 86.
View Article and Find Full Text PDFBackground: In identifying opportunities to improve the quality of stroke prevention in general practice, insight in areas of suboptimal care is essential. This study investigated the quality of care in stroke prevention in general practice and its relation to the occurrence of stroke.
Methods: Retrospective case-based audit with guideline-based review criteria and final judgment of suboptimal care by an expert panel.
Objectives: To perform a process evaluation of a multifaceted intervention to improve cardiovascular and diabetes care in general practice.
Methods: The feasibility of the intervention, carried out by outreach visitors in 62 practices, was addressed by evaluating whether the intervention programme was performed as planned and the extent to which it was accepted by the practice team. In addition, the costs of the programme were determined.
Background: To investigate differences in quality of preventive care provided by general practitioners (GPs) to patients at risk of stroke living in deprived and non-deprived neighbourhoods in the Rotterdam region.
Methods: A 'deprivation score' was used to categorize neighbourhoods according to their deprivation status. Data on the process of patient care were collected by means of chart review and interviews with GPs.
Objective: To assess organisational determinants in the prevention of cardiovascular disease.
Design: A cross-sectional study.
Setting And Subjects: 130 general practices in The Netherlands.
Background: Although outreach visitor interventions have proven to be effective, more detailed studies are needed to understand what elements of interventions work and why. In this study we investigate the determinants of success of an intervention for optimizing cardiovascular preventive care in general practice.
Methods: After baseline measurements and randomization, 62 general practices received a comprehensive intervention program, by means of outreach visitors, lasting 21 months.
Background: Adequate care for patients with cardiovascular risks requires an adequate practice organization. Educational outreach visits are a promising approach to modifying professional behavior. We aimed to assess whether the quality of cardiovascular preventive care in general practice can be improved through a comprehensive intervention implemented by an educational outreach visitor.
View Article and Find Full Text PDFThe aim of this study was to assess the provision of information and advice by general practitioners (GPs) with respect to patients with hypertension, hypercholesterolaemia, or cardiovascular disease. The study relied on the prospective recording of patient encounters by GPs. Performance indicators were selected from the Dutch national guidelines for general practice.
View Article and Find Full Text PDFObjectives: To describe the normal values for nocturnal urine production and its determinants, as well as the relation between nocturnal urine production and voiding frequency.
Methods: Data were collected from 1688 men aged 50 to 78 years without bladder or prostate cancer, radical prostatectomy, neurogenic bladder dysfunction, or negative advice from their general practitioner. Measurements included self-administered questionnaires, a 3-day frequency-volume chart, transrectal ultrasonography of the prostate, uroflowmetry, and postvoid residual urine volume measurement.
Purpose: We evaluated circadian urine production and its determinants in a large population based sample of older men.
Materials And Methods: We collected data on 1,688 men 50 to 78 years old, without radical prostatectomy, prostate or bladder cancer, neurogenic bladder disease or negative advice from their general practitioner, recruited from the population of Krimpen, the Netherlands. Measurements consisted of self-administered questionnaires, including the International Prostate Symptom Score, a 3-day frequency-volume chart, transrectal prostatic ultrasound, uroflowmetry and post-void residual volume.
Objective: To study health status and its correlates in older men with and without lower urogenital tract dysfunction.
Methods: Cross-sectional population-based study on 1688 men aged 50-78 years without bladder or prostate cancer, radical prostatectomy, neurogenic bladder dysfunction or a negative advice from their general practitioner. Data were collected through self-administered questionnaires, including Sickness Impact Profile (SIP, three domains), Inventory of Subjective Health (ISH), International Prostate Symptom Score (IPSS) and International Continence Society (ICS) Male Sex questionnaire, medication use, socio-economic and lifestyle factors.
High-pressure investigation of GaSb and Ga1-xInxSb/GaSb quantum wells.
Phys Rev B Condens Matter
February 1991