An official website of the United States government
Surveillance Research Program

Example 3

An example of U.S. Male Child Cancer for All Races by Age at Prevalence.

Objective

Calculate U.S. male child complete prevalence for all cancer sites and all races combined on January 1, 2015 using ComPrev. 

Steps

  1. Before we get started, please download and save the following .dic and .txt files to your computer. These files will be needed in a later step.

  2. Start the ComPrev application. 

  3. Select File, New Session from the menu. 

  4. For Type of Session, select Child Prevalence. Then press the Next button at the bottom of the window. 

  5. Since you are using the built in data file for ComPrev, just press the Next button on the Inc\Surv Parameters tab. 

  6. On the LDP tab, you will need to select your LDP data dictionary. Under step 1, where it says DIC File, press the Browse button. In the Open File dialog that is displayed, navigate to where you downloaded the file us.40yearldp.male.allsites.childshood.by.age.dic, and select the file, and press the Open button. Steps to create the U.S. limited-duration prevalence using SEER*Stat and Projprev are available with the Projprev software.

  7. You will now see a messagebox that is warning you that the data file (.TXT) could not be found at the specified location, but a file with the same name was found in the same directory, and that will be the file used. This is just fine, so press OK. 

  8. Next press the Mapping... button under Step 2. The Data Mapping window will be displayed. This window lets you tell ComPrev how to map your data file to its internal data. At the top of the window, you will see 2 combo boxes. For the ComPrev Field "Site", press the combo box arrow button under the LDP Field and select "All Sites". Finally, for the field "Sex" select "Male". Press the OK button. 

  9. Back on the Session Setup window - LDP tab, press the Next button. On the Selection tab, you will see that the values for "All Sites" and "Male" are already selected for you. These values were determined from your selections in the Mapping window. Press the Next button. 

  10. On the Settings tab, you can see that most of the information is already filled in for you from the LDP data file. The Prevalence Date is 2015, the Initial Data of Diagnosis is 1975, and the Age Groups is set to "Single Ages". Press the Finish button at the bottom of the window. 

  11. A Progress Window will be briefly displayed while ComPrev is calculating the complete prevalence statistics. When they are done, the Main window will be displayed. 

  12. On the left side of the Main Window, the list of cohorts to view are displayed. Since we only had data for one cohort, we just have the All Sites  \ Male cohort available. 

  13. On the right side of the Main Window, 5 tabs are displayed. 

    • Incidence: You can view the incidence parameters used by ComPrev as a table or graph. 

    • Survival: You can view the survival parameters used by ComPrev as a table or graph. 

    • Completeness Index: Contains a table with completeness index and standard error (if requested) by age at prevalence as well as a graph of the completeness index.

    • Prevalence Estimates: You can view the results as a table or graph. The table includes the completeness index (percents), the limited-duration and complete prevalence (percents and counts), and the U.S. population by age. SE's (Standard Errors) are included if requested. The first graph, Limited Duration Prevalence vs. Complete Prevalence, allows you to view the Counts and Percents of the Limited Duration overlapping that of the Complete Prevalence. The second graph, Complete Prevalence Count, allows you to view the counts for each age group. 

    • Settings: Displays all of the information you specified to create this session.