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INTRODUCTION AND AIMS This proposed study was to assess non-response bias in the 2004 Canadian Addictions Survey (CAS). DESIGN AND METHODS Two approaches were used to assess non-response bias in the CAS which had a response rate of only 47%. First, the CAS sample characteristics were compared with the 2002 Canadian Community Health Survey (CCHS, response(More)
BACKGROUND Glucocorticoids increase the risk of developing critical disease from viral infections. However, primary care practitioners in China use them as antipyretics, potentially exposing hundreds of millions to this risk. METHODS We enrolled all patients with confirmed pandemic influenza A (pH1N1) virus infection aged ≥3 years with available medical(More)
AIMS Minimum alcohol prices in British Columbia have been adjusted intermittently over the past 20 years. The present study estimates impacts of these adjustments on alcohol consumption. DESIGN Time-series and longitudinal models of aggregate alcohol consumption with price and other economic data as independent variables. SETTING British Columbia (BC),(More)
AIM To (i) compare the Yesterday method with other methods of assessing alcohol use applied in the 2004 Australian National Drug Strategy Household Survey (NDSHS) in terms of extent of under-reporting of actual consumption assessed from sales data; and (ii) illustrate applications of the Yesterday method as a means of variously measuring the size of an(More)
BACKGROUND AND AIMS Adjustments for under-reporting in alcohol surveys have been used in epidemiological and policy studies which assume that all drinkers underestimate their consumption equally. This study aims to describe a method of estimating how under-reporting of alcohol consumption might vary by age, gender and consumption level. METHOD The(More)
PROBLEM This study examines the relationships between collision involvement and several measures of cannabis use, including driving after using cannabis, among drivers, based on a population survey of Ontario adults in 2002 and 2003. METHOD Logistic regression analyses examined self-reported collision involvement in the last 12 months by lifetime use of(More)
INTRODUCTION AND AIMS Risk factors in older methadone maintenance treatment (MMT) patients may put them at a greater risk of acquiring chronic diseases; however, this group might experience barriers to treatment resulting in reduced recommended prescriptions. The research objective for this study was to assess whether MMT patients were significantly(More)
The paper introduces three texture analysis methods of ultrasonic images based on spatial domain method. Feature parameters, including mean, variance, contrast, homogeneity, angular second moment and entropy, are achieved from gray histogram statistic, gray level difference statistic (GLDS), gray level co-occurrence matrix (GLCM). Then the above statistical(More)
OBJECTIVES To assess the contribution of road rage victimization and perpetration to collision involvement. METHODS The relationship between self-reported collision involvement and road rage victimization and perpetration was examined, based on telephone interviews with a representative sample of 4897 Ontario adult drivers interviewed between 2002 and(More)
Several N-nitroso compounds (NOC) have been shown to be carcinogenic in a variety of laboratory animals, but evidence of their carcinogenicity in humans is lacking. We aimed to examine the association between NOC intake and colorectal cancer (CRC) risk and possible effect modification by vitamins C and E and protein in a large case-control study carried out(More)