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Survey or statistical program
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All (4)
All (4) ((4 results))
- Articles and reports: 12-001-X20060029555Description:
Researchers and policy makers often use data from nationally representative probability sample surveys. The number of topics covered by such surveys, and hence the amount of interviewing time involved, have typically increased over the years, resulting in increased costs and respondent burden. A potential solution to this problem is to carefully form subsets of the items in a survey and administer one such subset to each respondent. Designs of this type are called "split-questionnaire" designs or "matrix sampling" designs. The administration of only a subset of the survey items to each respondent in a matrix sampling design creates what can be considered missing data. Multiple imputation (Rubin 1987), a general-purpose approach developed for handling data with missing values, is appealing for the analysis of data from a matrix sample, because once the multiple imputations are created, data analysts can apply standard methods for analyzing complete data from a sample survey. This paper develops and evaluates a method for creating matrix sampling forms, each form containing a subset of items to be administered to randomly selected respondents. The method can be applied in complex settings, including situations in which skip patterns are present. Forms are created in such a way that each form includes items that are predictive of the excluded items, so that subsequent analyses based on multiple imputation can recover some of the information about the excluded items that would have been collected had there been no matrix sampling. The matrix sampling and multiple-imputation methods are evaluated using data from the National Health and Nutrition Examination Survey, one of many nationally representative probability sample surveys conducted by the National Center for Health Statistics, Centers for Disease Control and Prevention. The study demonstrates the feasibility of the approach applied to a major national health survey with complex structure, and it provides practical advice about appropriate items to include in matrix sampling designs in future surveys.
Release date: 2006-12-21 - Articles and reports: 82-618-M2006005Geography: CanadaDescription:
This article examines changes in weight over two-year intervals from 1996/1997 to 2004/2005 among Canadians aged 18 to 64 years. Using data from the longitudinal National Population Health Survey (NPHS), average weight change over four two-year intervals was examined for men and women by age group and body mass index (BMI) group. This article is part of the NPHS release and provides links to tables, other research articles and information about the National Population Health Survey.
Release date: 2006-11-06 - 3. Access to Health Care Services in Canada ArchivedJournals and periodicals: 82-575-XGeography: Province or territoryDescription:
This report provides results of the Health Services Access Survey (HSAS), which is now part of the Canadian Community Health Survey. The HSAS gathers comprehensive and comparable information on the patterns of use of health care services and self-reported difficulties faced by Canadians aged 15 and over in accessing health care. Data are presented for Canada as a whole and by province when sample sizes are sufficient.
Data on waiting times for specialized services such as specialist visits for a new illness or condition, non-emergency surgeries and selected diagnostics tests are also presented.
Release date: 2006-07-11 - Journals and periodicals: 82-581-XDescription:
This report briefly describes over 100 long-term medical follow-up studies covering topics over the complete life cycle including most age groups and diseases. The research projects examine delayed health outcomes in relation to occupational, environmental, lifestyle, medical and socio-economic factors.
This inventory of projects carried out since 1978, searchable by themes, will aid in determining earlier research completed using record linkage plus national birth, cancer and death databases for Canada. It outlines the agencies involved, the main investigators at the time of the work, the size of the study population, and provides citations to published findings. This report will be useful for those who make or influence policies, regulations and medical guidelines, and carry out research that affects the health of the population at the industry, community, regional, national or international level.
Release date: 2006-02-14
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Analysis (4)
Analysis (4) ((4 results))
- Articles and reports: 12-001-X20060029555Description:
Researchers and policy makers often use data from nationally representative probability sample surveys. The number of topics covered by such surveys, and hence the amount of interviewing time involved, have typically increased over the years, resulting in increased costs and respondent burden. A potential solution to this problem is to carefully form subsets of the items in a survey and administer one such subset to each respondent. Designs of this type are called "split-questionnaire" designs or "matrix sampling" designs. The administration of only a subset of the survey items to each respondent in a matrix sampling design creates what can be considered missing data. Multiple imputation (Rubin 1987), a general-purpose approach developed for handling data with missing values, is appealing for the analysis of data from a matrix sample, because once the multiple imputations are created, data analysts can apply standard methods for analyzing complete data from a sample survey. This paper develops and evaluates a method for creating matrix sampling forms, each form containing a subset of items to be administered to randomly selected respondents. The method can be applied in complex settings, including situations in which skip patterns are present. Forms are created in such a way that each form includes items that are predictive of the excluded items, so that subsequent analyses based on multiple imputation can recover some of the information about the excluded items that would have been collected had there been no matrix sampling. The matrix sampling and multiple-imputation methods are evaluated using data from the National Health and Nutrition Examination Survey, one of many nationally representative probability sample surveys conducted by the National Center for Health Statistics, Centers for Disease Control and Prevention. The study demonstrates the feasibility of the approach applied to a major national health survey with complex structure, and it provides practical advice about appropriate items to include in matrix sampling designs in future surveys.
Release date: 2006-12-21 - Articles and reports: 82-618-M2006005Geography: CanadaDescription:
This article examines changes in weight over two-year intervals from 1996/1997 to 2004/2005 among Canadians aged 18 to 64 years. Using data from the longitudinal National Population Health Survey (NPHS), average weight change over four two-year intervals was examined for men and women by age group and body mass index (BMI) group. This article is part of the NPHS release and provides links to tables, other research articles and information about the National Population Health Survey.
Release date: 2006-11-06 - 3. Access to Health Care Services in Canada ArchivedJournals and periodicals: 82-575-XGeography: Province or territoryDescription:
This report provides results of the Health Services Access Survey (HSAS), which is now part of the Canadian Community Health Survey. The HSAS gathers comprehensive and comparable information on the patterns of use of health care services and self-reported difficulties faced by Canadians aged 15 and over in accessing health care. Data are presented for Canada as a whole and by province when sample sizes are sufficient.
Data on waiting times for specialized services such as specialist visits for a new illness or condition, non-emergency surgeries and selected diagnostics tests are also presented.
Release date: 2006-07-11 - Journals and periodicals: 82-581-XDescription:
This report briefly describes over 100 long-term medical follow-up studies covering topics over the complete life cycle including most age groups and diseases. The research projects examine delayed health outcomes in relation to occupational, environmental, lifestyle, medical and socio-economic factors.
This inventory of projects carried out since 1978, searchable by themes, will aid in determining earlier research completed using record linkage plus national birth, cancer and death databases for Canada. It outlines the agencies involved, the main investigators at the time of the work, the size of the study population, and provides citations to published findings. This report will be useful for those who make or influence policies, regulations and medical guidelines, and carry out research that affects the health of the population at the industry, community, regional, national or international level.
Release date: 2006-02-14
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