Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
History of the Canadian Heart Health Surveys www.chhsnet.ca Context in the 1980s: – The burden of cardiovascular disease (CVD) • 39% of deaths due to CVD • Increasing rates of hospitalization and procedures – Growing evidence base • Risk factors known – high blood pressure, smoking, dyslipidemia • CVD largely preventable • Community-based health promotion, as well as clinical interventions, have demonstrated benefit Promoting Heart Health in Canada – A report of the Federal Provincial Working Group on Cardiovascular Disease Prevention and Control 1987. – Recognized the importance of developing a comprehensive epidemiologic database for: • Goal-setting • Baseline for future program evaluation • Mobilization of the public health system – Established the foundation for the Canadian Heart Health Initiative Leadership – Department of Health and Welfare Canada • Dr. Andres Petrasovits • Dr. Sylvie Stachenko – Statistics Canada • Dr. M. Nargundkar • Dr. C. Nair – Provincial Ministries of Health • Dr. David MacLean, Nova Scotia • Dr. Brian O’Connor, British Columbia • Dr. Richard Lessard, Quebec – Heart and Stroke Foundation of Canada Canadian Heart Health Surveys – Standardized methodology • Developed for the 1986 Nova Scotia Heart Health Survey • Approved by REB in each province – Provincial heart health surveys conducted in all 10 provinces between 1986-92 – Compilation of the Canadian Heart Health Surveys database 1995, available on CDROM and housed at the Database Centre in Memorial University. Methodology • Stratified, two-stage probability sample survey • Target population – adults 18-74 years, not including people living in Indian reserves, military camps and institutions • Sampling frame – Provincial health insurance registration files • Contact mail/telephone and consent Methodology • Data collection in 2 phases: – Home interview by public health nurse • Demographics, lifestyle behaviors, self-reported diabetes and hypertension, knowledge and awareness of the causes and consequences of CVD and risk factors. Questionnaire comprised of previously validated components. • BP measured twice – Clinic visit to public health dept. within 2 weeks • Anthropometric measurements - Ht, Wt, (WC, HC), BP measure twice, fasting blood sample drawn Methodology • Blood samples – Kept cold, centrifuged within 3 hours, plasma shipped on ice, received within 24 hours and analyzed at the Lipid Research Lab, University of Toronto • Questionnaire – Identifying face sheets removed, stored securely. Data double-entered • Provincial dataset – De-identified – Prepared, cleaned and analyzed Canadian Heart Health Surveys Database • 10 provincial databases combined – Ms. Allison Edwards, Canadian Heart Health Database Centre, Memorial University • Two probability weights calculated for each subject to account for the survey design: – interview and clinic weight • Database (2) – Database Centre: includes PSU, Postal code – CD-ROM: includes only designation of province Canadian Heart Health Surveys Database Total Sample Sample selected Interview completed Clinic visit completed Fasting blood sample 29,855 23,129 (78%) 19,841 (66%) 19,401 (65%) Canadian Heart Health Surveys Database Province BC AB SK MA ON PQ NB PE NS NF 2394 2237 2158 2766 2538 2353 2093 2088 2108 2394 Canadian Heart Health Surveys Database Age-Sex Group Male Female TOTAL 18-34 5755 6041 11,796 35-64 3621 3741 7362 65-74 2000 1971 3971 TOTAL 11,376 11,753 23,129 Canadian Heart Health Surveys Database • CHHS Research Group • Publications: – Canadian Heart Health Surveys: a profile of cardiovascular risk. CMAJ 1992. – Canadians and heart health: reducing the risk. Health Canada 1995. – Obesity: a risk factor for cardiovascular disease. CMAJ monograph 1997. – Cardiovascular disease and socioeconomic status. CMAJ monograph 2000 – Cardiovascular disease in seniors. CMAJ monograph 2002 – Hypertension (2). J Hypertension, JAMA. – Metabolic syndrome (2). Obesity Research. The Canadian Heart Health Surveys Follow-up Study is a New Emerging Team, funded by the Canadian Institutes for Health Research and the Heart and Stroke Foundation of Canada www.chhsnet.ca