Methods used for immunization coverage assessment in Canada, a Canadian Immunization Research Network (CIRN) study
Accurate and complete immunization data are necessary to assess vaccine coverage, safety and effectiveness. Across Canada, different methods and data sources are used to assess vaccine coverage, but these have not been systematically described. Our primary objective was to examine and describe the m...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2017-08-01
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| Series: | Human Vaccines & Immunotherapeutics |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/21645515.2017.1319022 |
| _version_ | 1797677577084600320 |
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| author | Sarah E. Wilson Susan Quach Shannon E. MacDonald Monika Naus Shelley L. Deeks Natasha S. Crowcroft Salaheddin M. Mahmud Dat Tran Jeff Kwong Karen Tu Nicolas L. Gilbert Caitlin Johnson Shalini Desai |
| author_facet | Sarah E. Wilson Susan Quach Shannon E. MacDonald Monika Naus Shelley L. Deeks Natasha S. Crowcroft Salaheddin M. Mahmud Dat Tran Jeff Kwong Karen Tu Nicolas L. Gilbert Caitlin Johnson Shalini Desai |
| author_sort | Sarah E. Wilson |
| collection | DOAJ |
| description | Accurate and complete immunization data are necessary to assess vaccine coverage, safety and effectiveness. Across Canada, different methods and data sources are used to assess vaccine coverage, but these have not been systematically described. Our primary objective was to examine and describe the methods used to determine immunization coverage in Canada. The secondary objective was to compare routine infant and childhood coverage estimates derived from the Canadian 2013 Childhood National Immunization Coverage Survey (cNICS) with estimates collected from provinces and territories (P/Ts). We collected information from key informants regarding their provincial, territorial or federal methods for assessing immunization coverage. We also collected P/T coverage estimates for select antigens and birth cohorts to determine absolute differences between these and estimates from cNICS. Twenty-six individuals across 16 public health organizations participated between April and August 2015. Coverage surveys are conducted regularly for toddlers in Quebec and in one health authority in British Columbia. Across P/Ts, different methodologies for measuring coverage are used (e.g., valid doses, grace periods). Most P/Ts, except Ontario, measure up-to-date (UTD) coverage and 4 P/Ts also assess on-time coverage. The degree of concordance between P/T and cNICS coverage estimates varied by jurisdiction, antigen and age group. In addition to differences in the data sources and processes used for coverage assessment, there are also differences between Canadian P/Ts in the methods used for calculating immunization coverage. Comparisons between P/T and cNICS estimates leave remaining questions about the proportion of children fully vaccinated in Canada. |
| first_indexed | 2024-03-11T22:47:17Z |
| format | Article |
| id | doaj.art-d877b3d322fb4f428d7e22ae628bdf3e |
| institution | Directory Open Access Journal |
| issn | 2164-5515 2164-554X |
| language | English |
| last_indexed | 2024-03-11T22:47:17Z |
| publishDate | 2017-08-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Human Vaccines & Immunotherapeutics |
| spelling | doaj.art-d877b3d322fb4f428d7e22ae628bdf3e2023-09-22T08:17:50ZengTaylor & Francis GroupHuman Vaccines & Immunotherapeutics2164-55152164-554X2017-08-011381928193610.1080/21645515.2017.13190221319022Methods used for immunization coverage assessment in Canada, a Canadian Immunization Research Network (CIRN) studySarah E. Wilson0Susan Quach1Shannon E. MacDonald2Monika Naus3Shelley L. Deeks4Natasha S. Crowcroft5Salaheddin M. Mahmud6Dat Tran7Jeff Kwong8Karen Tu9Nicolas L. Gilbert10Caitlin Johnson11Shalini Desai12Public Health OntarioPublic Health OntarioUniversity of AlbertaBC Centre for Disease ControlPublic Health OntarioPublic Health OntarioUniversity of ManitobaThe Hospital for Sick Children, University of TorontoPublic Health OntarioInstitute for Clinical Evaluative ServicesPublic Health Agency of CanadaPublic Health OntarioPublic Health Agency of CanadaAccurate and complete immunization data are necessary to assess vaccine coverage, safety and effectiveness. Across Canada, different methods and data sources are used to assess vaccine coverage, but these have not been systematically described. Our primary objective was to examine and describe the methods used to determine immunization coverage in Canada. The secondary objective was to compare routine infant and childhood coverage estimates derived from the Canadian 2013 Childhood National Immunization Coverage Survey (cNICS) with estimates collected from provinces and territories (P/Ts). We collected information from key informants regarding their provincial, territorial or federal methods for assessing immunization coverage. We also collected P/T coverage estimates for select antigens and birth cohorts to determine absolute differences between these and estimates from cNICS. Twenty-six individuals across 16 public health organizations participated between April and August 2015. Coverage surveys are conducted regularly for toddlers in Quebec and in one health authority in British Columbia. Across P/Ts, different methodologies for measuring coverage are used (e.g., valid doses, grace periods). Most P/Ts, except Ontario, measure up-to-date (UTD) coverage and 4 P/Ts also assess on-time coverage. The degree of concordance between P/T and cNICS coverage estimates varied by jurisdiction, antigen and age group. In addition to differences in the data sources and processes used for coverage assessment, there are also differences between Canadian P/Ts in the methods used for calculating immunization coverage. Comparisons between P/T and cNICS estimates leave remaining questions about the proportion of children fully vaccinated in Canada.http://dx.doi.org/10.1080/21645515.2017.1319022canadaimmunization coverageimmunization registriesimmunization registersvaccine-preventable diseases |
| spellingShingle | Sarah E. Wilson Susan Quach Shannon E. MacDonald Monika Naus Shelley L. Deeks Natasha S. Crowcroft Salaheddin M. Mahmud Dat Tran Jeff Kwong Karen Tu Nicolas L. Gilbert Caitlin Johnson Shalini Desai Methods used for immunization coverage assessment in Canada, a Canadian Immunization Research Network (CIRN) study Human Vaccines & Immunotherapeutics canada immunization coverage immunization registries immunization registers vaccine-preventable diseases |
| title | Methods used for immunization coverage assessment in Canada, a Canadian Immunization Research Network (CIRN) study |
| title_full | Methods used for immunization coverage assessment in Canada, a Canadian Immunization Research Network (CIRN) study |
| title_fullStr | Methods used for immunization coverage assessment in Canada, a Canadian Immunization Research Network (CIRN) study |
| title_full_unstemmed | Methods used for immunization coverage assessment in Canada, a Canadian Immunization Research Network (CIRN) study |
| title_short | Methods used for immunization coverage assessment in Canada, a Canadian Immunization Research Network (CIRN) study |
| title_sort | methods used for immunization coverage assessment in canada a canadian immunization research network cirn study |
| topic | canada immunization coverage immunization registries immunization registers vaccine-preventable diseases |
| url | http://dx.doi.org/10.1080/21645515.2017.1319022 |
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