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Reporting of Cancer Stage at Diagnosis Methodology

Reporting of Breast Cancer Stage at Diagnosis
Short description of Indicator ​Distribution of incident breast cancer cases by stage, cases diagnosed 2013 - 2017
Rationale for measurement Population-based staging data is critically important information that is used in cancer system surveillance, planning and healthcare system improvement. Knowing cancer stage allows cancer agencies and healthcare providers to better evaluate the appropriateness and effectiveness of cancer treatments delivered throughout the province.
Evidence/references for rationale “Cancer staging plays a pivotal role in the battle on cancer. It forms the basis for understanding the changes in population cancer incidence, extent of disease at initial presentation, and the overall impact of improvements in cancer treatment. Staging forms the base for defining groups for inclusion in clinical trials. Most importantly, staging provides those with cancer and their physicians the critical benchmark for defining prognosis and the likelihood of overcoming the cancer and for determining the best treatment approach for their cases.” (Preface from American Joint Committee on Cancer Staging Manual 7th edition
Calculations for the indicator ​(Stageable Breast incident cases in Ontario Cancer Registry with a valid stage by diagnosis year / Stageable Breast incident cases in Ontario Cancer Registry by diagnosis year) x 100

​Note: Breast cancer – females only
Standardized Rate Calculation N/A
Unit Percentage (%)
Data sources Ontario Health (Cancer Care Ontario), Ontario Cancer Registry (OCR EDW) and Best Stage Table
Time Frame 2013 - 2017 Calendar Years
Geographic Scale ​Provincial
Denominator description Stageable Breast incident cases in the Ontario Cancer Registry with a CS stage or TNM stage or No Stage by diagnosis year.
Numerator description Stageable Breast incident cases with CS or TNM stage in the Ontario Cancer Registry by diagnosis year.
Considerations Eligible cases include all cancers identifiable in the Ontario Cancer Registry except those cancers for which CS derived TNM staging is not appropriate. Cases assigned to “Unknown stage” are included in order to demonstrate an effort to stage all cases of a specific type so that meaningful inferences about that cancer can be made at the provincial level. SEER Multiple Primary and Histology Rules are used for case counting purposes.
Data availability & limitations The availability of population-based stage information relies in part on the timeliness of multiple data streams used to create cases in the Ontario Cancer Registry. It can take up to 18 months after diagnosis to ensure all cancer cases for a given year are identified. A data quality framework employing edits, productivity measures and specialized training and re-abstraction studies helps to ensure timeliness, validity and reliability of the stage data collection process.

 

Reporting of Colorectal Cancer Stage at Diagnosis
Short description of Indicator Distribution of incident colorectal cancer cases by stage, cases diagnosed 2013 - 2017
Rationale for measurement Population-based staging data is critically important information that is used in cancer system surveillance, planning and healthcare system improvement. Knowing cancer stage allows cancer agencies and healthcare providers to better evaluate the appropriateness and effectiveness of cancer treatments delivered throughout the province.
Evidence/references for rationale ​“Cancer staging plays a pivotal role in the battle on cancer. It forms the basis for understanding the changes in population cancer incidence, extent of disease at initial presentation, and the overall impact of improvements in cancer treatment. Staging forms the base for defining groups for inclusion in clinical trials. Most importantly, staging provides those with cancer and their physicians the critical benchmark for defining prognosis and the likelihood of overcoming the cancer and for determining the best treatment approach for their cases.” (Preface from American Joint Committee on Cancer Staging Manual 7th edition)
Calculations for the indicator (Stageable Colorectal incident cases in Ontario Cancer Registry with a valid stage by diagnosis year / Stageable Colorectal incident cases in Ontario Cancer Registry by diagnosis year) x 100
Standardized Rate Calculation N/A
Unit Percentage (%)
Data sources Ontario Health (Cancer Care Ontario), Ontario Cancer Registry (OCR EDW) and Best Stage Table
Time Frame 2013 - 2017 Calendar Years
Geographic Scale ​Provincial
Denominator description Stageable Colorectal incident cases in the Ontario Cancer Registry with a CS stage or TNM stage or No Stage by diagnosis year.
Numerator description ​Stageable Colorectal incident cases with CS or TNM stage in the Ontario Cancer Registry by diagnosis year.
Considerations Eligible cases include all cancers identifiable in the Ontario Cancer Registry except those cancers for which CS derived TNM staging is not appropriate. Cases assigned to “Unknown stage” are included in order to demonstrate an effort to stage all cases of a specific type so that meaningful inferences about that cancer can be made at the provincial level. SEER Multiple Primary and Histology Rules are used for case counting purposes.
Data availability & limitations The availability of population-based stage information relies in part on the timeliness of multiple data streams used to create cases in the Ontario Cancer Registry. It can take up to 18 months after diagnosis to ensure all cancer cases for a given year are identified. A data quality framework employing edits, productivity measures and specialized training and re-abstraction studies helps to ensure timeliness, validity and reliability of the stage data collection process.

 

Reporting of Lung Cancer Stage at Diagnosis
Short description of Indicator Distribution of incident lung cancer cases by stage, cases diagnosed 2013 - 2017
Rationale for measurement Population-based staging data is critically important information that is used in cancer system surveillance, planning and healthcare system improvement. Knowing cancer stage allows cancer agencies and healthcare providers to better evaluate the appropriateness and effectiveness of cancer treatments delivered throughout the province.
Evidence/references for rationale “Cancer staging plays a pivotal role in the battle on cancer. It forms the basis for understanding the changes in population cancer incidence, extent of disease at initial presentation, and the overall impact of improvements in cancer treatment. Staging forms the base for defining groups for inclusion in clinical trials. Most importantly, staging provides those with cancer and their physicians the critical benchmark for defining prognosis and the likelihood of overcoming the cancer and for determining the best treatment approach for their cases.” (Preface from American Joint Committee on Cancer Staging Manual 7th edition)
Calculations for the indicator ​(Stageable Lung incident cases in Ontario Cancer Registry with a valid stage by diagnosis year / Stageable Lung incident cases in Ontario Cancer Registry by diagnosis year) x 100
Standardized Rate Calculation N/A
Unit Percentage(%)
Data sources Ontario Health (Cancer Care Ontario), Ontario Cancer Registry (OCR EDW) and Best Stage Table
Time Frame 2013 - 2017 Calendar Years
Geographic Scale ​Provincial
Denominator description Stageable Lung incident cases in the Ontario Cancer Registry with a CS stage or TNM stage or No Stage by diagnosis year.
Numerator description Stageable Lung incident cases with CS or TNM stage in the Ontario Cancer Registry by diagnosis year.
Considerations Eligible cases include all cancers identifiable in the Ontario Cancer Registry except those cancers for which CS derived TNM staging is not appropriate. Cases assigned to “Unknown stage” are included in order to demonstrate an effort to stage all cases of a specific type so that meaningful inferences about that cancer can be made at the provincial level. SEER Multiple Primary and Histology Rules are used for case counting purposes.
Data availability & limitations ​The availability of population-based stage information relies in part on the timeliness of multiple data streams used to create cases in the Ontario Cancer Registry. It can take up to 18 months after diagnosis to ensure all cancer cases for a given year are identified. A data quality framework employing edits, productivity measures and specialized training and re-abstraction studies helps to ensure timeliness, validity and reliability of the stage data collection process.

 

Reporting of Prostate Cancer Stage at Diagnosis
Short description of Indicator Distribution of incident prostate cancer cases by stage, cases diagnosed 2013 - 2017
Rationale for measurement Population-based staging data is critically important information that is used in cancer system surveillance, planning and healthcare system improvement. Knowing cancer stage allows cancer agencies and healthcare providers to better evaluate the appropriateness and effectiveness of cancer treatments delivered throughout the province
Evidence/references for rationale “Cancer staging plays a pivotal role in the battle on cancer. It forms the basis for understanding the changes in population cancer incidence, extent of disease at initial presentation, and the overall impact of improvements in cancer treatment. Staging forms the base for defining groups for inclusion in clinical trials. Most importantly, staging provides those with cancer and their physicians the critical benchmark for defining prognosis and the likelihood of overcoming the cancer and for determining the best treatment approach for their cases.” (Preface from American Joint Committee on Cancer Staging Manual 7th edition)
Calculations for the indicator ​(Stageable Prostate incident cases in Ontario Cancer Registry with a valid stage by diagnosis year /
Stageable Prostate incident cases in Ontario Cancer Registry by diagnosis year) x 100
Standardized Rate Calculation N/A
Unit Percentage(%)
Data sources Ontario Health (Cancer Care Ontario), Ontario Cancer Registry (OCR EDW) and Best Stage Table
Time Frame 2013 - 2017 Calendar Years
Geographic Scale Provincial
Denominator description ​Stageable Prostate incident cases in the Ontario Cancer Registry with a CS stage or TNM stage or No Stage by diagnosis year.
Numerator description Stageable Prostate incident cases with CS or TNM stage in the Ontario Cancer Registry by diagnosis year.
Considerations  ​Eligible cases include all cancers identifiable in the Ontario Cancer Registry except those cancers for which CS derived TNM staging is not appropriate. Cases assigned to “Unknown stage” are included in order to demonstrate an effort to stage all cases of a specific type so that meaningful inferences about that cancer can be made at the provincial level. SEER Multiple Primary and Histology Rules are used for case counting purposes.
Data availability & limitations ​The availability of population-based stage information relies in part on the timeliness of multiple data streams used to create cases in the Ontario Cancer Registry. It can take up to 18 months after diagnosis to ensure all cancer cases for a given year are identified. A data quality framework employing edits, productivity measures and specialized training and re-abstraction studies helps to ensure timeliness, validity and reliability of the stage data collection process.