Table 2 Criteria for assessing the quality of reporting incidence methods
Criterion | Description |
|---|---|
Quality of cancer registry data | The extent to which each study reported details about the quality of the cancer registry data |
Definition of colorectal cancer | Report the following:   • The used classification system to define CRC   • CRC codes (including topography (anatomical site) and morphology (histology, behavior, and grade) codes)   • Conversion of ICD codes, if needed   • Type of cancer (primary/secondary) |
Definition of the numerator | Report any restrictions on included CRC cases |
Definition of the denominator (population at risk) | Report the following:   • The data source for the general population   • The used census years in estimating the at-risk population   • The methods used for obtaining postcensal and intercensal population estimates   • The estimation of annual mid-year population   • The calculation method for estimating average population size over several years of observation |
Age-standardized rates (ASRs) | Report the following:   • The standardization method used to calculate age-standardized rates (ASRs)   • The standard population used in the analysis and why this standard was chosen |
The time interval over which incidence is calculated | Report the time interval over which incidence is calculated (e.g., annual, overall average) |
Presentation of incidence rates | Incidence rates are expressed with a time unit (whole years or person-time) |
Age bands for measuring the incidence | Report the age bands used for measuring and documenting incidence |
Assessment of uncertainty | Report the 95% confidence intervals for the Incidence rate |
Assessment of missing data | Report missing data assessment and analysis |
Software information | Report Software information in the manuscript |