Lawrence W. Svenson

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BACKGROUND:Previously, we have demonstrated a high incidence and prevalence of Crohn's disease (CD) and ulcerative colitis (UC) in the Canadian province of Manitoba. However, the epidemiology of inflammatory bowel disease (IBD) in other regions of Canada has not been defined. The aim of this study was to estimate the incidence and prevalence of CD and UC in(More)
INTRODUCTION Severe acute renal failure (sARF) is associated with considerable morbidity, mortality and use of healthcare resources; however, its precise epidemiology and long-term outcomes have not been well described in a non-specified population. METHODS Population-based surveillance was conducted among all adult residents of the Calgary Health Region(More)
BACKGROUND In 2000, Ontario, Canada, initiated a universal influenza immunization program (UIIP) to provide free influenza vaccines for the entire population aged 6 mo or older. Influenza immunization increased more rapidly in younger age groups in Ontario compared to other Canadian provinces, which all maintained targeted immunization programs. We(More)
OBJECTIVE This study quantified the impact of delayed childbearing (maternal age greater-than-or-equal to 35 years) on population rate changes in low birth weight (LBW; < 2500 g), preterm delivery (< 37 weeks), multiple births, and small for gestational age (SGA; < 10th percentile) in Alberta, Canada, between 1990 (N = 42 930) and 1996 (N = 37 710). (More)
Study design: Cohort study with 6-years follow-up.Objective: To describe the utilization of health services by persons with spinal cord injury (SCI) and compare it with that of the general population.Setting: Alberta, Canada.Methods: All persons who sustained an SCI in Alberta between April 1992 and March 1994 were followed from date of injury to 6 years(More)
BACKGROUND The objective was to quantify direct health care costs attributable to traumatic spinal cord injury (SCI). METHODS This population-based cohort study followed individuals with SCI from date of injury to 6 years postinjury. SCI cases were matched to a comparison group randomly selected from the general population. Administrative data from a(More)
BACKGROUND The association between injurious falls requiring a visit to the emergency department and various classes of medications was examined in a case-control study of community living persons aged 66 years and older. METHODS Administrative databases from an urban health region provided the information used. Five controls for each case were randomly(More)
BACKGROUND Low income appears to be associated with a higher prevalence of diabetes and diabetes related complications, however, little is known about how income influences access to diabetes care. The objective of the present study was to determine whether income is associated with referral to a diabetes centre within a universal health care system. (More)
We obtained a list of all reported cases of Escherichia coli O157 in Alberta during the 2000-2002 period, and using scan statistics we identified yearly temporal and spatial clusters of reported cases of E. coli O157 during the summer and in southern Alberta. However, the location of the spatial cluster in the south was variable among years. The impact of(More)
OBJECTIVES To describe the incidence and pattern of traumatic spinal cord injury and cauda equina injury (SCI) in a geographically defined region of Canada. METHODS The study period was April 1, 1997 to March 31, 2000. Data were gathered from three provincial sources: administrative data from the Alberta Ministry of Health and Wellness, records from the(More)