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A statistical method allowing comparisons of populations that takes into account age-distribution differences between populations. Most incidence and death data in SEER are age-adjusted, although some tables, in contrast, present the crude rate. Age-adjusting takes the 2000 US population distribution and applies it to other time periods under consideration. This assures that such rates do not reflect any changes in the population age distribution. Rates can be adjusted for the distribution of other characteristics such as race/ethnicity.

Most data in SEER have been age-adjusted to the 2000 US standard population. This allows comparison across racial groups taking into account differences in age structure of the populations. For example, the average age of many Hispanic/Latino populations is less than that of other racial/ethnic groups. Therefore, it sometimes appears that these groups have lower cancer incidence rates than other groups. However, by adjusting for age, more accurate comparisons can be made. See Calculating Age-adjusted Rates for further information.

- Browse Related Terms: Age-Adjusted Rate, Age-Specific Rate, Crude Probability of Death, Crude Rate, Death Rate, Fast Stats, Life Tables, mortality, relative survival rate, standard error, Standard Million Population, Standard Population, Surveillance Data (Cancer), Survival, Cause-specific, Survival, Net, Survival, Observed, Survival, Period, Survival, Relative

All > Healthcare > Medicine > Cancer > Cancer Statistics

A term related to lifetime risk. The probability of developing cancer starting at a specific age and during a specified number of years.

- Browse Related Terms: Age-Conditional Risk, Annual Percent Change (APC), Confidence Interval, Incidence Rate, Joinpoint, Joinpoint Software, Lifetime Risk, Percent Change, Probability, Probability of Developing Cancer, Probability of Dying of Cancer, Spatial Correlation, statistically significant, Trends Over Time

All > Healthcare > Medicine > Cancer > Cancer Statistics

The rate of incidence or mortality of a specific age group, calculated per 100,000 people.

- Browse Related Terms: Age-Adjusted Rate, Age-Specific Rate, Crude Probability of Death, Crude Rate, Death Rate, Fast Stats, Life Tables, mortality, relative survival rate, standard error, Standard Million Population, Standard Population, Surveillance Data (Cancer), Survival, Cause-specific, Survival, Net, Survival, Observed, Survival, Period, Survival, Relative

All > Healthcare > Medicine > Cancer > Cancer Statistics

The average annual percent change over several years. The APC is used to measure trends or the change in rates over time. For information on how this is calculated, go to Trend Algortihms in the SEER*Stat Help system. The calculation involves fitting a straight line to the natural logarithm of the data when it is displayed by calendar year.

- Browse Related Terms: Age-Conditional Risk, Annual Percent Change (APC), Confidence Interval, Incidence Rate, Joinpoint, Joinpoint Software, Lifetime Risk, Percent Change, Probability, Probability of Developing Cancer, Probability of Dying of Cancer, Spatial Correlation, statistically significant, Trends Over Time

All > Healthcare > Medicine > Cancer > Cancer Statistics

An annual update of cancer death rates, incidence rates (new cases), and trends in the United States. The Centers for Disease Control and Prevention, the American Cancer Society, the National Cancer Institute, and the North American Association of Central Cancer Registries collaborate to create this report.

- Browse Related Terms: Annual Report to the Nation, Cancer Burden, Cancer Statistics Review (CSR), Delayed Reporting, Georeferenced Statistics, Incidence, Delay-Adjusted, Median Age at Diagnosis/Death, Reporting Delay, SEER Registries, Surveillance, Epidemiology, and End Results (SEER) Program

All > Healthcare > Medicine > Cancer > Cancer Statistics

An estimate of the financial, emotional, or social impact that cancer creates within the population. Different racial, ethnic, geographic, and age groups in the United States do not share the burden of disease equally.

- Browse Related Terms: Annual Report to the Nation, Cancer Burden, Cancer Statistics Review (CSR), Delayed Reporting, Georeferenced Statistics, Incidence, Delay-Adjusted, Median Age at Diagnosis/Death, Reporting Delay, SEER Registries, Surveillance, Epidemiology, and End Results (SEER) Program

All > Healthcare > Medicine > Cancer > Cancer Statistics

An annual report containing the most recent incidence, mortality, and survival statistics, published by the Cancer Statistics Branch of the NCI. It presents a broad profile of the cancer burden.

- Browse Related Terms: Annual Report to the Nation, Cancer Burden, Cancer Statistics Review (CSR), Delayed Reporting, Georeferenced Statistics, Incidence, Delay-Adjusted, Median Age at Diagnosis/Death, Reporting Delay, SEER Registries, Surveillance, Epidemiology, and End Results (SEER) Program

All > Healthcare > Medicine > Cancer > Cancer Statistics

A joint effort by several organizations to develop standard computerized methods for determining the stage of cancer based on tumor size, extension of the primary tumor, lymph node involvement, and metastases. This algorithm allows one to obtain both the American Joint Committee on Cancer (AJCC) stage and the SEER historic stage. The AJCC stage is used clinically, but its definitions change over time. The definitions of the SEER historic stages have remained constant over time.

- Browse Related Terms: Collaborative Staging Algorithm, Extent of Disease, ICCC Classification, In situ cancer, Invasive Cancer, Malignant Cancer, primary tumor, Stage, Stage at Diagnosis

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An estimated range of values which is likely to include an unknown population parameter. The 95% (p-value = .05) and 99% (p-value = .01) confidence intervals are the most commonly used.

If an estimated annual percentage change (APC) is -2.44 with a 95% confidence interval of (-2.83, -2.05), then we are 95% confident that the actual APC is between a decrease of -2.83% and a decrease of 2.05%. Inversely, there is still a 5% chance that the actual APC is not in the confidence interval (between the upper and lower confidence limits).

- Browse Related Terms: Age-Conditional Risk, Annual Percent Change (APC), Confidence Interval, Incidence Rate, Joinpoint, Joinpoint Software, Lifetime Risk, Percent Change, Probability, Probability of Developing Cancer, Probability of Dying of Cancer, Spatial Correlation, statistically significant, Trends Over Time

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The crude probability of death measures the mortality patterns actually experienced in a cohort of cancer patients on which many possible causes of death are acting simultaneously.

- Browse Related Terms: Age-Adjusted Rate, Age-Specific Rate, Crude Probability of Death, Crude Rate, Death Rate, Fast Stats, Life Tables, mortality, relative survival rate, standard error, Standard Million Population, Standard Population, Surveillance Data (Cancer), Survival, Cause-specific, Survival, Net, Survival, Observed, Survival, Period, Survival, Relative

All > Healthcare > Medicine > Cancer > Cancer Statistics

A crude rate is the ratio of the number of people in which the event of interest happens in a specified time period to the size of the population who may experience this event during the same time period. There are no adjustments made when a crude rate is given.

All > Healthcare > Medicine > Cancer > Cancer Statistics

- See Mortality.

All > Healthcare > Medicine > Cancer > Cancer Statistics

- See Reporting delay.

All > Healthcare > Medicine > Cancer > Cancer Statistics

- See Stage.
- Browse Related Terms: Collaborative Staging Algorithm, Extent of Disease, ICCC Classification, In situ cancer, Invasive Cancer, Malignant Cancer, primary tumor, Stage, Stage at Diagnosis

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Fast Stats is designed to allow quick and easy access to key statistics for all major cancer sites by age, sex, race, and geographic area. The statistics include incidence, mortality, prevalence, and the probability of developing or dying from cancer.

All > Healthcare > Medicine > Cancer > Cancer Statistics

The percentage of people in a study or treatment group who are alive five years after they were diagnosed with or treated for a disease, such as cancer. The disease may or may not have come back.

- Browse Related Terms: Five-Year Survival Rate, incidence, Prevalence, Complete, Prevalence, Limited Duration, Survival, Survival, Progression-Free

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All > Healthcare > Medicine > Cancer > Cancer Statistics

Statistics reported by geographic location of the events (e.g., residence of the cancer case)

All > Healthcare > Medicine > Cancer > Cancer Statistics

At the time the World Health Organization's (WHO) International Agency for Research on Cancer (IARC) published their first monograph on Childhood Cancer in 1988, Dr. R. Marsden published an annex giving a classification scheme for childhood cancer that consisted of 12 groups based chiefly on histologic type. The classification by Marsden has been modified and is now called the International Classification of Childhood Cancers.

- Browse Related Terms: Collaborative Staging Algorithm, Extent of Disease, ICCC Classification, In situ cancer, Invasive Cancer, Malignant Cancer, primary tumor, Stage, Stage at Diagnosis

All > Healthcare > Medicine > Cancer > Cancer Statistics

- See Stage.

All > Healthcare > Medicine > Cancer > Cancer Statistics

The number of newly diagnosed cases of cancer during a specific time period.

The American Cancer Society estimated that there would be approximately 1,399,790 people first diagnosed with cancer in 2006.

- Browse Related Terms: Five-Year Survival Rate, incidence, Prevalence, Complete, Prevalence, Limited Duration, Survival, Survival, Progression-Free

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