Use of medical services by methylphenidate-treated children in the general population.

Objectives: To examine selected medical services for children treated for attention-deficit/hyperactivity disorder (ADHD) in a general population setting with universal health insurance.

Design: Retrospective analysis of administrative prescription and health services databases spanning from 1990 to 1996.

Setting: British Columbia, Canada.

Beneath the calm surface: the changing face of physician-service use in British Columbia, 1985/86 versus 1996/97.

Background: Although expenditures on health care are continually increasing and often said to be unsustainable, few studies have examined these trends at the level of services delivered to individual patients. We analyzed trends in the various components that contributed to changes in overall expenditures for physician services in British Columbia from 1985/86 to 1996/97.

Methods: We obtained data on all fee-for-service payments to physicians in each study year using the British Columbia Linked Health Data set and analyzed these at the level of individual patients.

Influence of relatively low level of particulate ar pollution on hospitalization for COPD in elderly people.

To assess the association between relatively low levels of size-fractioned particulate matter (PM) and hospitalization for chronic obstructive pulmonary disease (COPD), we conducted a time-series analysis among elderly people 65 yr of age or more living in Vancouver between June 1995 and March 1999. Measures of thoracic PM (PM(10)), fine PM (PM(2.5)), coarse PM (PM(10-2.

Gaseous air pollutants and asthma hospitalization of children with low household income in Vancouver, British Columbia, Canada.

Associations of gaseous air pollutants (including carbon monoxide, sulfur dioxide, nitrogen dioxide, and ozone) with asthma hospitalization, stratified by sex and socioeconomic status, were examined among children 6-12 years of age in Vancouver, British Columbia, Canada, between 1987 and 1998. Relative risks for an exposure increment corresponding to the interquartile range for each gaseous air pollutant were estimated for asthma hospitalization after adjustment for weather conditions, including daily maximum and minimum temperatures as well as average relative humidity. Similar results were obtained by using locally weighted smoothing functions (LOESS) with default convergence criteria and by using natural cubic splines with a more stringent setting.

Conspicuous consumption: characterizing high users of physician services in one Canadian province.

Objectives: To examine medical care use and costs, patterns of morbidity and co-morbidity, and other patient characteristics of high users of physician services in British Columbia.

Methods: This population-based study uses physician claims, hospital discharge summaries and vital statistics data linked at the level of the individual to compare characteristics of high users, other users and non-users of physician services in the Province of British Columbia, Canada. The study included all enrolled adults in the universal health care plan during fiscal year 1996/97.

Association between ozone and respiratory admissions among children and the elderly in Vancouver, Canada.

In this study, we examine the impact of ozone on daily respiratory admissions in both young children and the elderly in greater Vancouver, British Columbia. Study subjects included children less than 3 yr of age and adults 65 yr of age or over living in greater Vancouver who had acute hospital admissions for any respiratory diseases (ICD-9 codes 460-519) during the 13-yr period 1986-1998. Bidirectional case-crossover analysis was used to investigate associations between ambient ozone and respiratory hospitalizations after adjustment for other pollutants, including carbon monoxide, nitrogen dioxide, sulfur dioxide, and coefficient of haze.

An integrated biopsychosocial approach to palliative care training of medical students.

In 1996 the University of Rochester School of Medicine, Rochester, New York, began a major curricular reform called the Double Helix Curriculum, integrating basic science and clinical training over 4 years of medical school. This transition provided a unique opportunity to develop and implement a fully integrated, comprehensive palliative care curriculum. In this three-part paper, we will describe: (1) our process of finding curricular time, setting priorities, and deciding on pedagogical strategies; (2) an overview of how palliative care teaching was integrated into the general curriculum, including examples of different teaching opportunities; and (3) our evaluation process, and some ongoing challenges.

The doctor is out: physician participation in the Rationed Access Day work stoppage in British Columbia, 1998/99.

Background: In 1998/99, the British Columbia Medical Association (BCMA) asked physicians to withdraw elective services on a series of 20 Rationed Access Days (RADs). This work stoppage was called to protest continued free proration triggered by total physician billings exceeding a fixed budget cap. This paper examines how physicians' practice activity changed on RADs, the rates of participation in this job action and characteristics of those physicians who participated.

Childhood behavior disorders and injuries among children and youth: a population-based study.

Context: While an association between pediatric behavioral disorders and injuries is generally acknowledged, no studies have measured the risk for injury in the context of a large, population-based study that is free of cohort biases.

Objectives: To examine the association between childhood behavior disorders ([CBDs] as indicated by prescription for methylphenidate [MPH]) and a variety of injury outcomes, and to evaluate the risk for injury among these children after controlling for known demographic correlates.

Design: Population-based database analysis of all children in British Columbia (BC) under the age of 19 as of December 31, 1996; comparison of those who had been prescribed MPH and therefore placed in the CBD group (n = 16, 806) and those who were not (n = 1,010,067).

Prescription of methylphenidate to children and youth, 1990-1996.

Background: There are concerns about the frequency and appropriateness of psychostimulant drug prescription to children. In order to identify unusual or unexpected patterns of use or prescribing, we reviewed prescription of methylphenidate (Ritalin) to children and adolescents aged 19 years or less in British Columbia between 1990 and 1996.

Methods: We obtained information about patients, physicians and prescriptions from British Columbia's Triplicate Prescription Program database for controlled drugs.

The quick and the dead: "managing" inpatient care in British Columbia hospitals, 1969-1995/96.

Objective: To examine changes in hospital use in British Columbia during a decade of capacity reductions.

Data Sources/study Setting: The data used are all separation records for British Columbia hospitals for the years 1969, 1978, 1985/86, 1993/94, and 1995/96. Separation records include acute care, rehabilitation, extended care, and surgical day care hospital encounters in British Columbia that were concluded during the years of interest.

Hospital downsizing and trends in health care use among elderly people in British Columbia.

Background: There has been considerable downsizing of acute care services in British Columbia over the past 2 decades. In this population-based study we examined changes in the proportion of elderly people who used acute care, long-term care and home care services between 1986-1988 and 1993-1995 to explore whether the downsizing has influenced use. Changes in death rates were also examined.

Age, costs of acute and long-term care and proximity to death: evidence for 1987-88 and 1994-95 in British Columbia.

Background: the consequences of ageing populations for health care costs have become a concern for governments and health care funders in most countries. However, there is increasing evidence that costs are more closely related to proximity to death than to age. This means that projections using age-specific costs will exaggerate the impact of ageing.

Mortality rates after cataract extraction.

Senile cataract may be a marker of generalized tissue aging. We examined this hypothesis using population-based linked health data. We hypothesized that any such association would diminish with increased use of cataract surgery.

Lung carcinoma presenting as metastasis to intracranial meningioma: case report and review of the literature.

Tumor-to-tumor metastasis is rare. The authors report a case of a 52-year-old man with a 1-year history of a right parasaggital meningioma, whose clinical signs were consistent with enlarging meningioma. In preparation for surgery, the routine preoperative chest radiograph revealed a lung mass.

Saphenous vein interposition graft for recurrent carotid stenosis after prior endarterectomy and stent placement. Case report.

Although the use of carotid artery stents is increasing, the management of recurrent stenosis after their placement is undefined. The authors report on a patient who underwent two left carotid endarterectomies followed by left carotid angioplasty and stent placement for recurrent stenosis. A third symptomatic recurrence was subsequently managed by placement of a saphenous vein interposition graft from the common carotid artery to the distal cervical internal carotid artery.

Socioeconomic status, mortality, and the development of cataract at a young age.

It has been hypothesized that senile cataract may serve as a marker for generalised tissue aging, since structural changes occurring in the proteins of the lens during cataract formation are similar to those which occur elsewhere as part of the aging process. An earlier analysis we carried out to test this hypothesis revealed a strong age-dependent relationship between undergoing cataract surgery and subsequent mortality. Relative risks for dying over 9 yr of follow-up were particularly increased for individuals who had developed cataract requiring operation between the ages of 50-65.

Intraoperative use of electroencephalography as an assessment of cerebral blood flow.

The electroencephalogram (EEG) is exquisitely sensitive to decreases in cerebral blood flow (CBF). The EEG can detect cerebral ischemia in the awake and generally anesthetized patient. EEG monitoring of CBF during carotid endarterectomy alerts the surgeon to the need for a shunt.

Reduction cranioplasty.

Reduction cranioplasty can greatly improve the quality of life for selected patients with severe macrocephaly and can significantly diminish some of the difficulties in the long-term chronic care of others. Because of differences in age, cranial morphology and surgical goals, the surgical plan must be tailored to the individual patient. Three techniques for reduction cranioplasty, with the advantages and disadvantages of each, are described.

The surgical management of benign intracranial meningiomas and acoustic neuromas in patients 70 years of age and older.

Over a 22-year-period (1967-1989) 80 patients 70 years of age and older underwent surgery for resection of a benign intracranial tumor. This group included 56 meningiomas and 24 acoustic neuromas. Forty-five of the tumors were completely excised, whereas 35 were partially removed.

Intracranial dissection of the distal middle cerebral artery as an uncommon cause of distal cerebral artery aneurysm. Case report.

An aneurysmal dissection of a right middle cerebral artery (MCA) branch is described in a 56-year-old woman. The abnormality was an incidental finding on computerized tomography and subsequently appeared on magnetic resonance imaging performed to evaluate the patient for subjective pulsatile tinnitus. The intracranial aneurysm was documented to have enlarged on serial angiography over a 6-week interval.