Benjamin T. B. Chan

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OBJECTIVES To estimate the total costs of multiple sclerosis (MS) for all Canadians in 1994. METHODS Prevalence-based study estimating disease-related societal costs for Canadians with MS in 1994. The human capital approach was used to estimate the value of lost productivity due to illness. Two components were revealed: first, direct costs, in terms of(More)
OBJECTIVE This study estimated the total cost of musculoskeletal disorders for Canadians in 1994 and assessed the sensitivity of these cost estimates to variations in the definition of musculoskeletal disorders. METHODS Disease-related costs, from a societal perspective, were measured using a prevalence-based analysis. First, direct treatment costs,(More)
QUESTION ADDRESSED This population-based study examines the factors affecting referrals by primary care physicians (PCPs) to specialists. MATERIALS AND METHODS Multilevel Poisson models were used to test the impact of patient, physician and community-level variables on the referral rate (the number of office-based specialist referrals per patient by the(More)
OBJECTIVE To estimate the total cost of cardiovascular disease in Canada. DESIGN Prevalence-based study estimating disease-related costs generated by individuals with cardiovascular disease in 1994, from a societal viewpoint. The human capital approach was used to estimate the value of lost productivity due to illness. SETTING Canada. OUTCOME MEASURES(More)
BACKGROUND Socioeconomic status appears to be an important predictor of coronary angiography use after acute myocardial infarction. One potential explanation for this is that patients with lower socioeconomic status live in neighbourhoods near nonteaching hospitals that have no catheterization capacity, few specialists and lower volumes of patients with(More)
Patients who make multiple visits to emergency departments (EDs) have been called “heavy users,” “repeaters” and “frequent fliers.” Previous studies have reported that such patients comprise 0.2% to 11% of the ED population and account for 1.9% to 32% of total visits. Heavy users have a high prevalence of psychosocial problems and often have co-existing(More)
BACKGROUND Recent studies suggest that comprehensiveness of primary care has declined steadily over the past decade. This study tracks the participation rates of general practitioners and family physicians in 6 nonoffice settings across Ontario and examines among which types of physicians this decline in comprehensiveness has occurred. METHODS Billing(More)
CONTEXT Previous studies have identified methods of decreasing laboratory utilization. However, most were hospital-based, relatively small, single-centered, or of limited duration. OBJECTIVE To determine the effect of 3 population-based interventions (physician guidelines, laboratory requisition form modification, and changes to funding policy) on(More)
BACKGROUND Asthma accounts for considerable burden on health care, but in most cases, asthma can be controlled. Quality-of-care indicators would aid in monitoring asthma management. We describe the quality of asthma care using a set of proposed quality indicators. METHODS We performed a retrospective cross-sectional study using health databases in(More)